These plants are known to be native
to south of Lake Pontchartrain:

This list is for research and inspiration.  Since so many of us are still learning about our unique regional ecosystems, we thought we'd share this comprehensive resource. Delta Flora couldn't possibly carry every LA native plant...  But if there is a plant on this list that you'd like to buy from us at the nursery, we'd be happy to know what you're interested in! You can send us an email at deltaflora504@gmail.com.

  Scientific Name Common Name   Family Common Name Growth Habit Parish
  Abutilon Indian mallow   Mallow family   LA(Orleans, St. Charles, Terrebonne)
  Acalypha copperleaf   Spurge family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Acalypha gracilens slender threeseed mercury   Spurge family Forb/herb LA(Jefferson, Orleans, St. Charles, Terrebonne)
  Acalypha ostryifolia pineland threeseed mercury   Spurge family Forb/herb LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Acalypha rhomboidea common threeseed mercury   Spurge family Forb/herb LA(Jefferson, Lafourche, Orleans, St. Charles)
  Acalypha setosa Cuban copperleaf   Spurge family Forb/herb LA(Lafourche, Orleans, St. Charles)
  Acalypha virginica Virginia threeseed mercury   Spurge family Forb/herb LA(Orleans, St. Charles)
  Acer maple   Maple family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Acer negundo boxelder   Maple family Tree LA(Jefferson, Lafourche, Orleans, St. Charles, Terrebonne)
  Acer rubrum red maple   Maple family Tree LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Acer rubrum var. drummondii Drummond's maple   Maple family Tree LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Acer rubrum var. rubrum red maple   Maple family Tree LA(Lafourche, St. Bernard, St. Charles)
  Acer rubrum var. trilobum red maple   Maple family Tree LA(Orleans)
  Achillea yarrow   Aster family   LA(Orleans, St. Bernard, Terrebonne)
  Achillea millefolium common yarrow   Aster family Forb/herb LA(Orleans, St. Bernard, Terrebonne)
  Achillea millefolium var. occidentalis western yarrow   Aster family Forb/herb LA(Orleans, St. Bernard, Terrebonne)
  Acmella spotflower   Aster family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Acmella oppositifolia oppositeleaf spotflower   Aster family Forb/herb LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Acmella oppositifolia var. repens oppositeleaf spotflower   Aster family Forb/herb LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Acorus sweetflag   Calamus family   LA(Orleans)
  Adiantum maidenhair fern   Maidenhair Fern family   LA(Lafourche, Orleans, St. Charles)
  Adiantum capillus-veneris common maidenhair   Maidenhair Fern family Forb/herb LA(Lafourche, Orleans, St. Charles)
  Aeschynomene jointvetch   Pea family   LA(Jefferson, Lafourche, Orleans, St. Charles, Terrebonne)
  Aeschynomene americana shyleaf   Pea family Forb/herb, Subshrub LA(Jefferson, Lafourche, St. Charles, Terrebonne)
  Aeschynomene indica Indian jointvetch   Pea family Forb/herb LA(Jefferson, Lafourche, Orleans, St. Charles, Terrebonne)
  Aesculus buckeye   Horse-chestnut family   LA(Orleans)
  Aesculus pavia red buckeye   Horse-chestnut family Tree, Shrub LA(Orleans)
  Aesculus pavia var. pavia red buckeye   Horse-chestnut family Shrub, Tree LA(Orleans)
  Agalinis false foxglove   Figwort family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Agalinis fasciculata beach false foxglove   Figwort family Forb/herb LA(Jefferson)
  Agalinis heterophylla prairie false foxglove   Figwort family Forb/herb LA(Jefferson, St. Charles)
  Agalinis linifolia flaxleaf false foxglove   Figwort family Forb/herb LA(Orleans)
  Agalinis maritima saltmarsh false foxglove   Figwort family Forb/herb LA(Jefferson, Lafourche, St. Bernard, Terrebonne)
  Agalinis maritima var. grandiflora saltmarsh false foxglove   Figwort family Forb/herb LA(Jefferson, Lafourche, St. Bernard, Terrebonne)
  Agalinis obtusifolia tenlobe false foxglove   Figwort family Forb/herb LA(St. Charles)
  Agalinis purpurea purple false foxglove   Figwort family Forb/herb LA(Jefferson, St. Bernard, St. Charles)
  Ageratina snakeroot   Aster family   LA(Jefferson, Lafourche, Orleans, St. Charles, Terrebonne)
  Ageratina altissima white snakeroot   Aster family Forb/herb LA(Jefferson, Lafourche, Orleans, St. Charles, Terrebonne)
  Ageratina aromatica lesser snakeroot   Aster family Forb/herb LA(Orleans)
  Ageratina aromatica var. aromatica lesser snakeroot   Aster family Forb/herb LA(Orleans)
  Agrostis bentgrass   Grass family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Agrostis hyemalis winter bentgrass   Grass family Graminoid LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Allium onion   Lily family   LA(Jefferson, Orleans, St. Bernard, St. Charles, Terrebonne)
  Allium canadense meadow garlic   Lily family Forb/herb LA(Jefferson, Orleans, St. Bernard, St. Charles, Terrebonne)
  Allium canadense var. canadense meadow garlic   Lily family Forb/herb LA(Jefferson, Orleans, St. Bernard, St. Charles, Terrebonne)
  Alopecurus foxtail   Grass family   LA(Jefferson, Lafourche, Orleans, St. Charles, Terrebonne)
  Alopecurus carolinianus Carolina foxtail   Grass family Graminoid LA(Jefferson, Lafourche, Orleans, St. Charles, Terrebonne)
  Alternanthera joyweed   Amaranth family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Alternanthera paronychioides smooth joyweed   Amaranth family Forb/herb LA(Jefferson, Orleans, Terrebonne)
  Alternanthera paronychioides var. paronychioides smooth joyweed   Amaranth family Forb/herb LA(Jefferson, Orleans, Terrebonne)
  Amaranthus arenicola sandhill amaranth   Amaranth family Forb/herb LA(Jefferson, Orleans, St. Bernard)
  Amaranthus australis southern amaranth   Amaranth family Subshrub, Forb/herb LA(Jefferson, Orleans, St. Bernard, St. Charles, Terrebonne)
  Amaranthus cannabinus tidalmarsh amaranth   Amaranth family Forb/herb LA(Terrebonne)
  Amaranthus greggii Gregg's amaranth   Amaranth family Forb/herb LA(Jefferson)
  Amaranthus hybridus slim amaranth   Amaranth family Forb/herb LA(Jefferson, Lafourche, Orleans, St. Charles, Terrebonne)
  Amaranthus palmeri carelessweed   Amaranth family Forb/herb LA(Jefferson, Orleans)
  Amaranthus retroflexus redroot amaranth   Amaranth family Forb/herb LA(Orleans, St. Charles, Terrebonne)
  Amaranthus spinosus spiny amaranth   Amaranth family Forb/herb LA(Jefferson, Orleans, St. Charles, Terrebonne)
  Amaranthus tuberculatus roughfruit amaranth   Amaranth family Forb/herb LA(Jefferson, Orleans, St. Bernard, St. Charles, Terrebonne)
  Amaranthus viridis slender amaranth   Amaranth family Forb/herb LA(Jefferson, Lafourche, Orleans, St. Charles, Terrebonne)
  Ambrosia ragweed   Aster family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Ambrosia artemisiifolia annual ragweed   Aster family Forb/herb LA(Jefferson, Lafourche, Orleans, St. Charles, Terrebonne)
  Ambrosia artemisiifolia var. paniculata annual ragweed   Aster family Forb/herb LA(Jefferson, Lafourche, Orleans, St. Charles, Terrebonne)
  Ambrosia psilostachya Cuman ragweed   Aster family Forb/herb LA(Jefferson, Lafourche, Orleans, Terrebonne)
  Ambrosia trifida great ragweed   Aster family Subshrub, Forb/herb LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Amianthium amianthium   Lily family   LA(Orleans)
  Amianthium muscitoxicum flypoison   Lily family Forb/herb LA(Orleans)
  Ammannia redstem   Loosestrife family   LA(Jefferson, Orleans, St. Bernard, St. Charles, Terrebonne)
  Ammannia auriculata eared redstem   Loosestrife family Forb/herb LA(Terrebonne)
  Ammannia coccinea valley redstem   Loosestrife family Subshrub, Forb/herb LA(Jefferson, Orleans, St. Charles, Terrebonne)
  Ammannia latifolia pink redstem   Loosestrife family Forb/herb, Subshrub LA(St. Bernard)
  Amorpha false indigo   Pea family   LA(Jefferson, Orleans, St. Charles)
  Amorpha fruticosa false indigo bush   Pea family Shrub LA(Jefferson, Orleans, St. Charles)
  Ampelopsis peppervine   Grape family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Ampelopsis cordata heartleaf peppervine   Grape family Vine LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Amphicarpaea hogpeanut   Pea family   LA(Orleans, St. Bernard, St. Charles, Terrebonne)
  Amphicarpaea bracteata American hogpeanut   Pea family Vine, Forb/herb LA(Orleans, St. Bernard, St. Charles, Terrebonne)
  Anagallis pimpernel   Primrose family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Anagallis minima chaffweed   Primrose family Forb/herb LA(Jefferson, Lafourche, Orleans, St. Bernard, Terrebonne)
  Andropogon bluestem   Grass family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Andropogon glomeratus bushy bluestem   Grass family Graminoid LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Andropogon gyrans Elliott's bluestem   Grass family Graminoid LA(Orleans, St. Bernard)
  Andropogon gyrans var. gyrans Elliott's bluestem   Grass family Graminoid LA(Orleans, St. Bernard)
  Andropogon ternarius splitbeard bluestem   Grass family Graminoid LA(Jefferson)
  Andropogon ternarius var. ternarius splitbeard bluestem   Grass family Graminoid LA(Jefferson)
  Andropogon virginicus broomsedge bluestem   Grass family Graminoid LA(Jefferson, Orleans, St. Bernard, St. Charles, Terrebonne)
  Andropogon virginicus var. virginicus broomsedge bluestem   Grass family Graminoid LA(Jefferson, Orleans, St. Bernard, St. Charles, Terrebonne)
  Anredera madieravine   Basella family   LA(Jefferson, Orleans, Terrebonne)
  Apios groundnut   Pea family   LA(St. Charles, Terrebonne)
  Apios americana groundnut   Pea family Vine, Forb/herb LA(St. Charles, Terrebonne)
  Apocynum dogbane   Dogbane family   LA(St. Charles)
  Apocynum cannabinum Indianhemp   Dogbane family Forb/herb LA(St. Charles)
  Aralia spikenard   Ginseng family   LA(Terrebonne)
  Aralia spinosa devil's walkingstick   Ginseng family Tree, Shrub LA(Terrebonne)
  Ardisia marlberry   Myrsine family   LA(Terrebonne)
  Arenaria sandwort   Pink family   LA(Jefferson, Lafourche, Orleans)
  Arenaria lanuginosa spreading sandwort   Pink family Forb/herb LA(Orleans)
  Arenaria lanuginosa ssp. lanuginosa spreading sandwort   Pink family Forb/herb LA(Orleans)
  Arenaria lanuginosa ssp. lanuginosa var. lanuginosa spreading sandwort   Pink family Forb/herb LA(Orleans)
  Argemone pricklypoppy   Poppy family   LA(Jefferson, Orleans, Terrebonne)
  Argemone albiflora bluestem pricklypoppy   Poppy family Forb/herb LA(Jefferson, Orleans, Terrebonne)
  Argemone mexicana Mexican pricklypoppy   Poppy family Forb/herb LA(Orleans)
  Arisaema Jack in the pulpit   Arum family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Arisaema dracontium green dragon   Arum family Forb/herb LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Aristida threeawn   Grass family   LA(Lafourche, Orleans)
  Aristida longespica slimspike threeawn   Grass family Graminoid LA(Lafourche, Orleans)
  Aristida longespica var. geniculata slimspike threeawn   Grass family Graminoid LA(Lafourche, Orleans)
  Artemisia sagebrush   Aster family   LA(Orleans, St. Charles, Terrebonne)
  Artemisia ludoviciana ssp. ludoviciana white sagebrush   Aster family Subshrub, Forb/herb LA(Terrebonne)
  Arundinaria cane   Grass family   LA(Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Arundinaria gigantea giant cane   Grass family Subshrub, Shrub, Graminoid LA(Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Asclepias milkweed   Milkweed family   LA(Jefferson, Lafourche, Orleans, St. Charles, Terrebonne)
  Asclepias incarnata swamp milkweed   Milkweed family Forb/herb LA(Jefferson, Lafourche, St. Charles, Terrebonne)
  Asclepias incarnata ssp. incarnata swamp milkweed   Milkweed family Forb/herb LA(Jefferson, Lafourche, St. Charles, Terrebonne)
  Asclepias lanceolata fewflower milkweed   Milkweed family Forb/herb LA(St. Charles)
  Asclepias perennis aquatic milkweed   Milkweed family Forb/herb LA(Jefferson, Lafourche, Orleans, St. Charles, Terrebonne)
  Asplenium spleenwort   Spleenwort family   LA(Jefferson, Orleans, St. Bernard, St. Charles, Terrebonne)
  Asplenium platyneuron ebony spleenwort   Spleenwort family Forb/herb LA(Jefferson, Orleans, St. Bernard, St. Charles, Terrebonne)
  Athyrium ladyfern   Wood Fern family   LA(Orleans)
  Athyrium filix-femina common ladyfern   Wood Fern family Forb/herb LA(Orleans)
  Athyrium filix-femina ssp. asplenioides asplenium ladyfern   Wood Fern family Forb/herb LA(Orleans)
  Atriplex saltbush   Goosefoot family   LA(Jefferson, Lafourche, St. Bernard, Terrebonne)
  Atriplex cristata crested saltbush   Goosefoot family Forb/herb, Shrub, Subshrub LA(Jefferson, Lafourche, St. Bernard, Terrebonne)
  Avicennia mangrove   Verbena family   LA(Jefferson, Lafourche, St. Bernard, Terrebonne)
  Avicennia germinans black mangrove   Verbena family Tree, Shrub LA(Jefferson, Lafourche, St. Bernard, Terrebonne)
  Axonopus carpetgrass   Grass family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Axonopus compressus broadleaf carpetgrass   Grass family Graminoid LA(Orleans)
  Axonopus fissifolius common carpetgrass   Grass family Graminoid LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Axonopus furcatus big carpetgrass   Grass family Graminoid LA(Orleans, St. Charles)
  Azolla mosquitofern   Azolla family   LA(Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Azolla caroliniana Carolina mosquitofern   Azolla family Forb/herb LA(Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Baccharis baccharis   Aster family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Baccharis angustifolia saltwater false willow   Aster family Shrub LA(Orleans, St. Bernard, Terrebonne)
  Baccharis halimifolia eastern baccharis   Aster family Tree, Shrub LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Bacopa waterhyssop   Figwort family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Bacopa monnieri herb of grace   Figwort family Forb/herb LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Bacopa repens creeping waterhyssop   Figwort family Forb/herb LA(Orleans)
  Bacopa rotundifolia disk waterhyssop   Figwort family Forb/herb LA(Orleans)
  Batis turtleweed   Saltwort family   LA(Jefferson, Lafourche, St. Bernard, Terrebonne)
  Batis maritima turtleweed   Saltwort family Subshrub LA(Jefferson, Lafourche, St. Bernard, Terrebonne)
  Berchemia supplejack   Buckthorn family   LA(Jefferson, Lafourche, St. Bernard, St. Charles, Terrebonne)
  Berchemia scandens Alabama supplejack   Buckthorn family Vine LA(Jefferson, Lafourche, St. Bernard, St. Charles, Terrebonne)
  Betula birch   Birch family   LA(Orleans)
  Betula nigra river birch   Birch family Tree LA(Orleans)
  Bidens beggarticks   Aster family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Bidens bipinnata Spanish needles   Aster family Forb/herb LA(Jefferson, St. Charles, Terrebonne)
  Bidens cernua nodding beggartick   Aster family Forb/herb LA(St. Charles, Terrebonne)
  Bidens discoidea small beggarticks   Aster family Forb/herb LA(Orleans)
  Bidens frondosa devil's beggartick   Aster family Forb/herb LA(St. Charles)
  Bidens laevis smooth beggartick   Aster family Forb/herb LA(Jefferson, Lafourche, Orleans, St. Charles, Terrebonne)
  Bidens tripartita threelobe beggarticks   Aster family Forb/herb LA(Orleans)
  Bignonia bignonia   Trumpet-creeper family   LA(Jefferson, Orleans, St. Bernard, St. Charles, Terrebonne)
  Bignonia capreolata crossvine   Trumpet-creeper family Vine LA(Jefferson, Orleans, St. Bernard, St. Charles, Terrebonne)
  Blutaparon blutaparon   Amaranth family   LA(Jefferson, Lafourche, Terrebonne)
  Blutaparon vermiculare silverhead   Amaranth family Forb/herb LA(Jefferson, Lafourche, Terrebonne)
  Boehmeria false nettle   Nettle family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Boehmeria cylindrica smallspike false nettle   Nettle family Forb/herb LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Boerhavia spiderling   Four o'clock family   LA(Jefferson, Lafourche, Orleans, St. Charles)
  Boerhavia diffusa red spiderling   Four o'clock family Forb/herb LA(Jefferson, Orleans)
  Boerhavia erecta erect spiderling   Four o'clock family Forb/herb LA(Jefferson, Lafourche, Orleans, St. Charles)
  Bolboschoenus robustus sturdy bulrush   Sedge family Graminoid LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Boltonia doll's daisy   Aster family   LA(Jefferson, St. Bernard, St. Charles, Terrebonne)
  Boltonia asteroides white doll's daisy   Aster family Forb/herb LA(Terrebonne)
  Boltonia asteroides var. asteroides white doll's daisy   Aster family Forb/herb LA(Terrebonne)
  Boltonia diffusa smallhead doll's daisy   Aster family Forb/herb LA(Jefferson, St. Bernard, St. Charles)
  Boltonia diffusa var. diffusa smallhead doll's daisy   Aster family Forb/herb LA(Jefferson, St. Bernard, St. Charles)
  Borrichia seaside tansy   Aster family   LA(Jefferson, Lafourche, St. Bernard)
  Borrichia frutescens bushy seaside tansy   Aster family Subshrub LA(Jefferson, Lafourche, St. Bernard)
  Bothriochloa beardgrass   Grass family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Bothriochloa hybrida hybrid beardgrass   Grass family Graminoid LA(Jefferson, Orleans)
  Bothriochloa laguroides silver beardgrass   Grass family Graminoid LA(Lafourche, Orleans)
  Bothriochloa laguroides ssp. torreyana silver beardgrass   Grass family Graminoid LA(Lafourche, Orleans)
  Bothriochloa longipaniculata longspike beardgrass   Grass family Graminoid LA(Lafourche, Orleans, St. Charles, Terrebonne)
  Botrychium grapefern   Adder's-tongue family   LA(St. Bernard, Terrebonne)
  Botrychium biternatum sparselobe grapefern   Adder's-tongue family Forb/herb LA(St. Bernard, Terrebonne)
  Bowlesia bowlesia   Carrot family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles)
  Bowlesia incana hoary bowlesia   Carrot family Forb/herb LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles)
  Brasenia brasenia   Water-shield family   LA(Lafourche)
  Brasenia schreberi watershield   Water-shield family Forb/herb LA(Lafourche)
  Bromus brome   Grass family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Bromus pubescens hairy woodland brome   Grass family Graminoid LA(Orleans)
  Brunnichia buckwheat vine   Buckwheat family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Brunnichia ovata American buckwheat vine   Buckwheat family Vine LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Buchnera bluehearts   Figwort family   LA(Jefferson)
  Buchnera americana American bluehearts   Figwort family Forb/herb LA(Jefferson)
  Bulbostylis hairsedge   Sedge family   LA(Orleans, St. Charles)
  Bulbostylis ciliatifolia capillary hairsedge   Sedge family Graminoid LA(Orleans)
  Bupleurum bupleurum   Carrot family   LA(Orleans)
  Cabomba fanwort   Water-shield family   LA(Jefferson, Lafourche, Orleans, St. Charles, Terrebonne)
  Cabomba caroliniana Carolina fanwort   Water-shield family Forb/herb LA(Jefferson, Lafourche, Orleans, St. Charles, Terrebonne)
  Cabomba caroliniana var. caroliniana Carolina fanwort   Water-shield family Forb/herb LA(Jefferson, Lafourche, Orleans, St. Charles, Terrebonne)
  Caesalpinia nicker   Pea family   LA(Lafourche)
  Caesalpinia bonduc yellow nicker   Pea family Shrub, Vine LA(Lafourche)
  Cakile searocket   Mustard family   LA(Jefferson, Lafourche, St. Bernard, Terrebonne)
  Cakile constricta Gulf Coast searocket   Mustard family Forb/herb LA(Jefferson, Lafourche, St. Bernard, Terrebonne)
  Cakile geniculata gulf searocket   Mustard family Subshrub, Forb/herb LA(Jefferson, Lafourche, St. Bernard, Terrebonne)
  Cakile lanceolata coastal searocket   Mustard family Subshrub, Forb/herb LA(St. Bernard)
  Cakile lanceolata ssp. fusiformis coastal searocket   Mustard family Subshrub, Forb/herb LA(St. Bernard)
  Callicarpa beautyberry   Verbena family   LA(Jefferson, Orleans, St. Bernard, Terrebonne)
  Callicarpa americana American beautyberry   Verbena family Shrub LA(Jefferson, Orleans, St. Bernard, Terrebonne)
  Callisia roseling   Spiderwort family   LA(Orleans)
  Callitriche water-starwort   Water-starwort family   LA(Orleans, Terrebonne)
  Callitriche pedunculosa Nuttall's water-starwort   Water-starwort family Forb/herb LA(Orleans)
  Callitriche peploides matted water-starwort   Water-starwort family Forb/herb LA(Orleans, Terrebonne)
  Calopogon grasspink   Orchid family   LA(Lafourche)
  Calopogon tuberosus tuberous grasspink   Orchid family Forb/herb LA(Lafourche)
  Calopogon tuberosus var. tuberosus tuberous grasspink   Orchid family Forb/herb LA(Lafourche)
  Calystegia false bindweed   Morning-glory family   LA(Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Calystegia sepium hedge false bindweed   Morning-glory family Forb/herb, Vine LA(Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Campsis campsis   Trumpet-creeper family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Campsis radicans trumpet creeper   Trumpet-creeper family Vine LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Canna canna   Canna family   LA(Jefferson, Lafourche, Orleans, St. Charles)
  Canna flaccida bandanna of the Everglades   Canna family Forb/herb LA(Jefferson, Lafourche, Orleans, St. Charles)
  Canna glauca maraca amarilla   Canna family Forb/herb LA(Lafourche, St. Charles)
  Capsicum pepper   Potato family   LA(St. Charles)
  Capsicum annuum cayenne pepper   Potato family Subshrub, Forb/herb LA(St. Charles)
  Capsicum annuum var. glabriusculum cayenne pepper   Potato family Subshrub, Forb/herb LA(St. Charles)
  Cardamine bittercress   Mustard family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Cardamine bulbosa bulbous bittercress   Mustard family Forb/herb LA(Orleans)
  Cardamine parviflora sand bittercress   Mustard family Forb/herb LA(Orleans, St. Bernard, St. Charles)
  Cardamine parviflora var. arenicola sand bittercress   Mustard family Forb/herb LA(Orleans, St. Bernard, St. Charles)
  Cardamine pensylvanica Pennsylvania bittercress   Mustard family Forb/herb LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Cardiospermum balloonvine   Soapberry family   LA(Jefferson, Orleans, St. Bernard, St. Charles, Terrebonne)
  Carex sedge   Sedge family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Carex alata broadwing sedge   Sedge family Graminoid LA(Jefferson, St. Charles)
  Carex albolutescens greenwhite sedge   Sedge family Graminoid LA(St. Bernard, St. Charles)
  Carex amphibola eastern narrowleaf sedge   Sedge family Graminoid LA(Jefferson, Orleans, St. Charles)
  Carex basiantha Willdenow's sedge   Sedge family Graminoid LA(Orleans)
  Carex blanda eastern woodland sedge   Sedge family Graminoid LA(Jefferson, Orleans, St. Charles)
  Carex cephalophora oval-leaf sedge   Sedge family Graminoid LA(Jefferson, Orleans, St. Bernard, St. Charles)
  Carex cherokeensis Cherokee sedge   Sedge family Graminoid LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Carex comosa longhair sedge   Sedge family Graminoid LA(Lafourche, St. Charles, Terrebonne)
  Carex complanata hirsute sedge   Sedge family Graminoid LA(St. Charles)
  Carex crinita fringed sedge   Sedge family Graminoid LA(Orleans)
  Carex crinita var. brevicrinis fringed sedge   Sedge family Graminoid LA(Orleans)
  Carex crus-corvi ravenfoot sedge   Sedge family Graminoid LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Carex debilis white edge sedge   Sedge family Graminoid LA(Orleans)
  Carex debilis var. debilis white edge sedge   Sedge family Graminoid LA(Orleans)
  Carex festucacea fescue sedge   Sedge family Graminoid LA(Jefferson, Orleans, St. Charles)
  Carex flaccosperma thinfruit sedge   Sedge family Graminoid LA(Jefferson)
  Carex frankii Frank's sedge   Sedge family Graminoid LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Carex gigantea giant sedge   Sedge family Graminoid LA(Lafourche, Orleans, Terrebonne)
  Carex glaucescens southern waxy sedge   Sedge family Graminoid LA(St. Charles)
  Carex hyalinolepis shoreline sedge   Sedge family Graminoid LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles)
  Carex leavenworthii Leavenworth's sedge   Sedge family Graminoid LA(Jefferson, Orleans, St. Charles)
  Carex longii Long's sedge   Sedge family Graminoid LA(Jefferson, Orleans)
  Carex louisianica Louisiana sedge   Sedge family Graminoid LA(Orleans, St. Charles)
  Carex lupulina hop sedge   Sedge family Graminoid LA(Jefferson, Lafourche, Orleans, St. Charles, Terrebonne)
  Carex lurida shallow sedge   Sedge family Graminoid LA(Jefferson)
  Carex muehlenbergii Muhlenberg's sedge   Sedge family Graminoid LA(St. Charles)
  Carex muehlenbergii var. muehlenbergii Muhlenberg's sedge   Sedge family Graminoid LA(St. Charles)
  Carex oxylepis sharpscale sedge   Sedge family Graminoid LA(Terrebonne)
  Carex oxylepis var. oxylepis sharpscale sedge   Sedge family Graminoid LA(Terrebonne)
  Carex reniformis kidneyshape sedge   Sedge family Graminoid LA(Lafourche)
  Carex triangularis eastern fox sedge   Sedge family Graminoid LA(Jefferson)
  Carex tribuloides blunt broom sedge   Sedge family Graminoid LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Carex vulpinoidea fox sedge   Sedge family Graminoid LA(St. Bernard, St. Charles)
  Carex vulpinoidea var. vulpinoidea fox sedge   Sedge family Graminoid LA(St. Bernard, St. Charles)
  Carpinus hornbeam   Birch family   LA(Orleans, Terrebonne)
  Carpinus caroliniana American hornbeam   Birch family Tree, Shrub LA(Orleans, Terrebonne)
  Carpinus caroliniana ssp. caroliniana American hornbeam   Birch family Tree, Shrub LA(Orleans, Terrebonne)
  Carya hybrid hickory   Walnut family   LA(Jefferson, Orleans, St. Bernard, St. Charles, Terrebonne)
  Carya aquatica water hickory   Walnut family Tree LA(Jefferson, Orleans, St. Bernard, St. Charles)
  Carya illinoinensis pecan   Walnut family Tree LA(Jefferson, Orleans, St. Bernard, St. Charles, Terrebonne)
  Castilleja Indian paintbrush   Figwort family   LA(Jefferson)
  Castilleja indivisa entireleaf Indian paintbrush   Figwort family Forb/herb LA(Jefferson)
  Catalpa catalpa   Trumpet-creeper family   LA(Lafourche, Orleans, Terrebonne)
  Catalpa bignonioides southern catalpa   Trumpet-creeper family Tree LA(Lafourche, Orleans, Terrebonne)
  Celosia cock's comb   Amaranth family   LA(Lafourche)
  Celtis hackberry   Elm family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Celtis laevigata sugarberry   Elm family Tree, Shrub LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Celtis laevigata var. laevigata sugarberry   Elm family Shrub, Tree LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Cenchrus sandbur   Grass family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Cenchrus echinatus southern sandbur   Grass family Graminoid LA(Jefferson, Orleans, Terrebonne)
  Cenchrus myosuroides big sandbur   Grass family Graminoid LA(Jefferson, Terrebonne)
  Cenchrus spinifex coastal sandbur   Grass family Graminoid LA(Jefferson, Lafourche, Orleans, St. Charles, Terrebonne)
  Cenchrus tribuloides sanddune sandbur   Grass family Graminoid LA(Jefferson, St. Bernard, Terrebonne)
  Centaurea knapweed   Aster family   LA(Jefferson, Orleans, St. Charles, Terrebonne)
  Centella centella   Carrot family   LA(Jefferson, Orleans, Terrebonne)
  Centella erecta erect centella   Carrot family Forb/herb LA(Jefferson, Orleans, Terrebonne)
  Centrosema butterfly pea   Pea family   LA(Jefferson, Orleans, St. Charles, Terrebonne)
  Centrosema virginianum spurred butterfly pea   Pea family Vine, Forb/herb LA(Jefferson, Orleans, St. Charles, Terrebonne)
  Cephalanthus buttonbush   Madder family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Cephalanthus occidentalis common buttonbush   Madder family Shrub, Tree LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Cerastium mouse-ear chickweed   Pink family   LA(Jefferson, Orleans, St. Bernard, St. Charles, Terrebonne)
  Ceratophyllum hornwort   Hornwort family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Ceratophyllum demersum coon's tail   Hornwort family Forb/herb LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Ceratophyllum echinatum spineless hornwort   Hornwort family Forb/herb LA(St. Charles, Terrebonne)
  Ceratopteris antlerfern   Water Fern family   LA(Jefferson, Lafourche, Orleans, St. Charles, Terrebonne)
  Ceratopteris pteridoides floating antlerfern   Water Fern family Forb/herb LA(Jefferson, Lafourche, St. Charles, Terrebonne)
  Ceratopteris richardii triangle waterfern   Water Fern family Forb/herb LA(Lafourche, Orleans)
  Ceratopteris thalictroides watersprite   Water Fern family Forb/herb LA(Jefferson, Terrebonne)
  Cercis redbud   Pea family   LA(Orleans, St. Charles)
  Cercis canadensis eastern redbud   Pea family Tree, Shrub LA(Orleans, St. Charles)
  Cercis canadensis var. canadensis eastern redbud   Pea family Tree, Shrub LA(Orleans, St. Charles)
  Chaerophyllum chervil   Carrot family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Chaerophyllum tainturieri hairyfruit chervil   Carrot family Forb/herb LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Chamaecrista sensitive pea   Pea family   LA(Jefferson, Orleans, St. Charles, Terrebonne)
  Chamaecrista fasciculata partridge pea   Pea family Forb/herb LA(Jefferson, Orleans, St. Charles, Terrebonne)
  Chamaecrista fasciculata var. fasciculata partridge pea   Pea family Forb/herb LA(Jefferson, Orleans, St. Charles, Terrebonne)
  Chamaecrista nictitans sensitive partridge pea   Pea family Subshrub, Forb/herb LA(Orleans)
  Chamaecrista nictitans ssp. nictitans sensitive partridge pea   Pea family Subshrub, Forb/herb LA(Orleans)
  Chamaecrista nictitans ssp. nictitans var. nictitans sensitive partridge pea   Pea family Forb/herb, Subshrub LA(Orleans)
  Chamaesyce sandmat   Spurge family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Chamaesyce bombensis dixie sandmat   Spurge family Forb/herb LA(Jefferson, St. Bernard, Terrebonne)
  Chamaesyce cordifolia heartleaf sandmat   Spurge family Forb/herb LA(Jefferson)
  Chamaesyce glyptosperma ribseed sandmat   Spurge family Forb/herb LA(Jefferson, Terrebonne)
  Chamaesyce hirta pillpod sandmat   Spurge family Forb/herb LA(Orleans, St. Charles, Terrebonne)
  Chamaesyce humistrata spreading sandmat   Spurge family Forb/herb LA(Lafourche, Orleans, St. Charles, Terrebonne)
  Chamaesyce hypericifolia graceful sandmat   Spurge family Forb/herb, Subshrub LA(Jefferson, Orleans)
  Chamaesyce hyssopifolia hyssopleaf sandmat   Spurge family Forb/herb LA(Jefferson, Orleans, St. Charles)
  Chamaesyce maculata spotted sandmat   Spurge family Forb/herb LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles)
  Chamaesyce nutans eyebane   Spurge family Forb/herb LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Chamaesyce ophthalmica Florida hammock sandmat   Spurge family Forb/herb LA(Terrebonne)
  Chamaesyce prostrata prostrate sandmat   Spurge family Forb/herb LA(Jefferson, Orleans, St. Bernard, St. Charles, Terrebonne)
  Chamaesyce serpens matted sandmat   Spurge family Forb/herb LA(Jefferson)
  Chamaesyce thymifolia gulf sandmat   Spurge family Forb/herb LA(St. Bernard)
  Chaptalia sunbonnetts   Aster family   LA(Orleans)
  Chaptalia tomentosa woolly sunbonnets   Aster family Forb/herb LA(Orleans)
  Chasmanthium woodoats   Grass family   LA(Lafourche)
  Chasmanthium latifolium Indian woodoats   Grass family Graminoid LA(Lafourche)
  Chasmanthium laxum slender woodoats   Grass family Graminoid LA(Lafourche)
  Chenopodium goosefoot   Goosefoot family   LA(Jefferson, Lafourche, Orleans, St. Bernard, Terrebonne)
  Chenopodium album lambsquarters   Goosefoot family Forb/herb LA(Jefferson, Orleans, Terrebonne)
  Chenopodium berlandieri pitseed goosefoot   Goosefoot family Forb/herb LA(Jefferson, Lafourche, St. Bernard, Terrebonne)
  Chenopodium berlandieri var. boscianum pitseed goosefoot   Goosefoot family Forb/herb LA(Jefferson, Lafourche, St. Bernard, Terrebonne)
  Chionanthus fringetree   Olive family   LA(Orleans)
  Chionanthus virginicus white fringetree   Olive family Tree, Shrub LA(Orleans)
  Chloris windmill grass   Grass family   LA(Jefferson, Orleans)
  Chloris virgata feather fingergrass   Grass family Graminoid LA(Orleans)
  Chromolaena thoroughwort   Aster family   LA(Lafourche, Terrebonne)
  Chromolaena ivifolia ivyleaf thoroughwort   Aster family Forb/herb, Subshrub LA(Lafourche, Terrebonne)
  Chrysopsis goldenaster   Aster family   LA(Terrebonne)
  Chrysopsis texana Texas chrysopsis   Aster family Forb/herb LA(Terrebonne)
  Cicuta water hemlock   Carrot family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Cicuta maculata spotted water hemlock   Carrot family Forb/herb LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Cirsium thistle   Aster family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Cirsium discolor field thistle   Aster family Forb/herb LA(Terrebonne)
  Cirsium horridulum yellow thistle   Aster family Forb/herb LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Cirsium horridulum var. horridulum yellow thistle   Aster family Forb/herb LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Cissus treebine   Grape family   LA(Jefferson, Orleans, St. Charles, Terrebonne)
  Cissus trifoliata sorrelvine   Grape family Vine LA(Jefferson, Orleans, St. Charles, Terrebonne)
  Cladium sawgrass   Sedge family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Cladium mariscus swamp sawgrass   Sedge family Graminoid LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Cladium mariscus ssp. jamaicense Jamaica swamp sawgrass   Sedge family Graminoid LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Clematis leather flower   Buttercup family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Clematis crispa swamp leather flower   Buttercup family Vine LA(Jefferson, Lafourche, Orleans, St. Bernard, Terrebonne)
  Clematis virginiana devil's darning needles   Buttercup family Vine LA(Jefferson, Lafourche, Orleans, St. Charles, Terrebonne)
  Cleome spiderflower   Caper family   LA(Orleans, St. Charles, Terrebonne)
  Clinopodium clinopodium   Mint family   LA(Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Clinopodium brownei Browne's savory   Mint family Forb/herb LA(Lafourche, Orleans, St. Bernard, Terrebonne)
  Clitoria pigeonwings   Pea family   LA(Orleans)
  Clitoria mariana Atlantic pigeonwings   Pea family Vine, Forb/herb LA(Orleans)
  Cocculus coralbead   Moonseed family   LA(Jefferson, Lafourche, Orleans, St. Charles, Terrebonne)
  Cocculus carolinus Carolina coralbead   Moonseed family Vine LA(Jefferson, Lafourche, Orleans, St. Charles, Terrebonne)
  Commelina dayflower   Spiderwort family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Commelina diffusa climbing dayflower   Spiderwort family Forb/herb LA(Jefferson, Orleans, St. Bernard, St. Charles, Terrebonne)
  Commelina diffusa var. diffusa climbing dayflower   Spiderwort family Forb/herb LA(Jefferson, Orleans, St. Bernard, St. Charles, Terrebonne)
  Commelina erecta whitemouth dayflower   Spiderwort family Forb/herb LA(Jefferson, Orleans)
  Commelina virginica Virginia dayflower   Spiderwort family Forb/herb LA(Jefferson, Orleans, St. Bernard, Terrebonne)
  Conioselinum hemlockparsley   Carrot family   LA(Orleans)
  Conioselinum chinense eastern hemlockparsley   Carrot family Forb/herb LA(Orleans)
  Conoclinium thoroughwort   Aster family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Conoclinium coelestinum blue mistflower   Aster family Forb/herb LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Convolvulus bindweed   Morning-glory family   LA(Orleans)
  Conyza horseweed   Aster family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Conyza canadensis Canadian horseweed   Aster family Forb/herb LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Conyza canadensis var. canadensis Canadian horseweed   Aster family Forb/herb LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Conyza canadensis var. pusilla Canadian horseweed   Aster family Forb/herb LA(St. Bernard)
  Corchorus corchorus   Linden family   LA(Lafourche, Orleans)
  Coreopsis tickseed   Aster family   LA(Jefferson, Orleans, St. Charles)
  Coreopsis grandiflora largeflower tickseed   Aster family Forb/herb LA(St. Charles)
  Coreopsis grandiflora var. grandiflora largeflower tickseed   Aster family Forb/herb LA(St. Charles)
  Coreopsis tinctoria golden tickseed   Aster family Forb/herb LA(Jefferson, Orleans, St. Charles)
  Coreopsis tinctoria var. tinctoria golden tickseed   Aster family Forb/herb LA(Jefferson, Orleans, St. Charles)
  Cornus dogwood   Dogwood family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Cornus drummondii roughleaf dogwood   Dogwood family Tree, Shrub LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Cornus florida flowering dogwood   Dogwood family Tree, Shrub LA(Orleans)
  Cornus foemina stiff dogwood   Dogwood family Tree, Shrub LA(Jefferson, Lafourche, St. Charles)
  Corydalis fumewort   Fumitory family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Corydalis micrantha smallflower fumewort   Fumitory family Forb/herb LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Corydalis micrantha ssp. australis smallflower fumewort   Fumitory family Forb/herb LA(Jefferson, Lafourche, Orleans, St. Charles)
  Corydalis micrantha ssp. micrantha smallflower fumewort   Fumitory family Forb/herb LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Crassula pygmyweed   Stonecrop family   LA(Jefferson)
  Crassula aquatica water pygmyweed   Stonecrop family Forb/herb LA(Jefferson)
  Crataegus hawthorn   Rose family   LA(Jefferson, Lafourche, Orleans, St. Charles)
  Crataegus marshallii parsley hawthorn   Rose family Tree, Shrub LA(Orleans)
  Crataegus spathulata littlehip hawthorn   Rose family Tree, Shrub LA(Orleans)
  Crataegus viridis green hawthorn   Rose family Tree, Shrub LA(Jefferson, Lafourche, Orleans, St. Charles)
  Crataegus viridis var. viridis green hawthorn   Rose family Tree, Shrub LA(Jefferson, Lafourche, Orleans, St. Charles)
  Crepis hawksbeard   Aster family   LA(Orleans)
  Crinum swamplily   Lily family   LA(Orleans, St. Bernard, St. Charles, Terrebonne)
  Crinum americanum seven sisters   Lily family Forb/herb LA(Orleans, St. Bernard, St. Charles, Terrebonne)
  Crotalaria rattlebox   Pea family   LA(Jefferson)
  Croton croton   Spurge family   LA(Jefferson, Lafourche, St. Bernard, St. Charles, Terrebonne)
  Croton capitatus hogwort   Spurge family Forb/herb LA(St. Charles, Terrebonne)
  Croton capitatus var. lindheimeri Lindheimer's hogwort   Spurge family Forb/herb LA(St. Charles, Terrebonne)
  Croton glandulosus vente conmigo   Spurge family Subshrub, Forb/herb LA(Jefferson, St. Charles, Terrebonne)
  Croton lindheimerianus threeseed croton   Spurge family Forb/herb LA(Terrebonne)
  Croton lindheimerianus var. lindheimerianus threeseed croton   Spurge family Forb/herb LA(Terrebonne)
  Croton punctatus gulf croton   Spurge family Subshrub, Forb/herb LA(Jefferson, Lafourche, St. Bernard, Terrebonne)
  Ctenitis lacefern   Wood Fern family   LA(Terrebonne)
  Ctenitis submarginalis brownhair lacefern   Wood Fern family Forb/herb LA(Terrebonne)
  Cucurbita gourd   Cucumber family   LA(Jefferson)
  Cucurbita pepo field pumpkin   Cucumber family Vine, Forb/herb LA(Jefferson)
  Cuphea waxweed   Loosestrife family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Cuscuta dodder   Dodder family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Cuscuta compacta compact dodder   Dodder family Forb/herb, Vine LA(Orleans)
  Cuscuta compacta var. compacta compact dodder   Dodder family Vine, Forb/herb LA(Orleans)
  Cuscuta gronovii scaldweed   Dodder family Forb/herb, Vine LA(Orleans, St. Charles, Terrebonne)
  Cuscuta indecora bigseed alfalfa dodder   Dodder family Vine, Forb/herb LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Cuscuta indecora var. neuropetala bigseed dodder   Dodder family Vine, Forb/herb LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Cuscuta pentagona fiveangled dodder   Dodder family Forb/herb, Vine LA(Jefferson, Orleans, Terrebonne)
  Cuscuta pentagona var. pentagona fiveangled dodder   Dodder family Forb/herb, Vine LA(Jefferson, Orleans, Terrebonne)
  Cymodocea cymodocea   Manatee-grass family   LA(St. Bernard)
  Cymodocea filiformis manatee grass   Manatee-grass family Forb/herb LA(St. Bernard)
  Cynanchum swallow-wort   Milkweed family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Cynanchum angustifolium gulf coast swallow-wort   Milkweed family Forb/herb, Vine LA(Jefferson, Lafourche, St. Bernard, Terrebonne)
  Cynanchum laeve honeyvine   Milkweed family Vine, Forb/herb LA(Orleans, St. Charles)
  Cyperus flatsedge   Sedge family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Cyperus acuminatus tapertip flatsedge   Sedge family Graminoid LA(St. Bernard)
  Cyperus articulatus jointed flatsedge   Sedge family Graminoid LA(Jefferson, Lafourche, Orleans, St. Charles)
  Cyperus compressus poorland flatsedge   Sedge family Graminoid LA(Jefferson, Orleans, St. Charles, Terrebonne)
  Cyperus croceus Baldwin's flatsedge   Sedge family Graminoid LA(Jefferson, Orleans, St. Bernard, St. Charles)
  Cyperus distinctus swamp flatsedge   Sedge family Graminoid LA(Orleans, St. Charles)
  Cyperus echinatus globe flatsedge   Sedge family Graminoid LA(Jefferson, Orleans, St. Charles)
  Cyperus elegans royal flatsedge   Sedge family Graminoid LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Cyperus erythrorhizos redroot flatsedge   Sedge family Graminoid LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Cyperus esculentus yellow nutsedge   Sedge family Graminoid LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Cyperus filicinus fern flatsedge   Sedge family Graminoid LA(Jefferson)
  Cyperus flavescens yellow flatsedge   Sedge family Graminoid LA(Orleans)
  Cyperus haspan haspan flatsedge   Sedge family Graminoid LA(Orleans, St. Bernard, Terrebonne)
  Cyperus lecontei Le Conte's flatsedge   Sedge family Graminoid LA(Orleans)
  Cyperus lupulinus Great Plains flatsedge   Sedge family Graminoid LA(Jefferson, Lafourche, Orleans, St. Bernard, Terrebonne)
  Cyperus lupulinus ssp. lupulinus Great Plains flatsedge   Sedge family Graminoid LA(Jefferson, Lafourche, Orleans, St. Bernard, Terrebonne)
  Cyperus ochraceus pond flatsedge   Sedge family Graminoid LA(Jefferson, Lafourche, Orleans, St. Bernard)
  Cyperus odoratus fragrant flatsedge   Sedge family Graminoid LA(Jefferson, Orleans, St. Bernard, St. Charles, Terrebonne)
  Cyperus oxylepis sharpscale flatsedge   Sedge family Graminoid LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Cyperus polystachyos manyspike flatsedge   Sedge family Graminoid LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles)
  Cyperus polystachyos var. texensis Texan flatsedge   Sedge family Graminoid LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles)
  Cyperus pseudovegetus marsh flatsedge   Sedge family Graminoid LA(Jefferson, Lafourche, Orleans, St. Charles, Terrebonne)
  Cyperus retrofractus rough flatsedge   Sedge family Graminoid LA(Orleans)
  Cyperus retrorsus pine barren flatsedge   Sedge family Graminoid LA(Jefferson, St. Charles, Terrebonne)
  Cyperus retrorsus var. retrorsus pine barren flatsedge   Sedge family Graminoid LA(Jefferson, St. Charles, Terrebonne)
  Cyperus squarrosus bearded flatsedge   Sedge family Graminoid LA(Orleans, St. Charles)
  Cyperus strigosus strawcolored flatsedge   Sedge family Graminoid LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Cyperus surinamensis tropical flatsedge   Sedge family Graminoid LA(Jefferson, Orleans, St. Bernard, St. Charles)
  Cyperus thyrsiflorus southern flatsedge   Sedge family Graminoid LA(Jefferson, Orleans, St. Bernard, Terrebonne)
  Cyperus virens green flatsedge   Sedge family Graminoid LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Cyrtomium netvein hollyfern   Wood Fern family   LA(Orleans, St. Charles)
  Datura jimsonweed   Potato family   LA(St. Charles, Terrebonne)
  Daucus wild carrot   Carrot family   LA(Orleans, St. Charles, Terrebonne)
  Daucus pusillus American wild carrot   Carrot family Forb/herb LA(Orleans, Terrebonne)
  Decodon decodon   Loosestrife family   LA(Lafourche, St. Charles, Terrebonne)
  Decodon verticillatus swamp loosestrife   Loosestrife family Subshrub, Shrub LA(Lafourche, St. Charles, Terrebonne)
  Decumaria decumaria   Hydrangea family   LA(Terrebonne)
  Decumaria barbara woodvamp   Hydrangea family Vine LA(Terrebonne)
  Desmanthus bundleflower   Pea family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Desmanthus illinoensis Illinois bundleflower   Pea family Subshrub, Forb/herb LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Desmodium ticktrefoil   Pea family   LA(Jefferson, Lafourche, Orleans, St. Bernard, St. Charles, Terrebonne)
  Desmodium canescens hoary ticktrefoil   Pea family Forb/herb LA(Jefferson, Orleans, St. Charles, Terrebonne)
  Desmodium fernaldii Fernald's ticktrefoil   Pea family