The Vascular Flora of Madison County, Texas


Browsing the flora by family:

A-B    C-H    I-O    P-Q    R-Z


County Abundance :  R= rare      I= infrequently encountered     F= frequently encountered    C= common
blank= no data, past collectors

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Family Division Genus Specific epithet Common name Abundance var./ ssp. Sub-specific tax. division
Acanthaceae Magnoliopsida Dicliptera brachiata - I

Acanthaceae Magnoliopsida Hygrophila lacustris Lake Acanthus R

Acanthaceae Magnoliopsida Justicia americana American Water-willow I

Acanthaceae Magnoliopsida Justicia ovata Lanceleaved Water-willow F var. lanceolata
Acanthaceae Magnoliopsida Ruellia humilis Low Ruellia C

Acanthaceae Magnoliopsida Ruellia nudiflora Violet Ruellia I

Acanthaceae Magnoliopsida Ruellia strepens Limestone Ruellia I

Aceraceae Magnoliopsida Acer negundo Boxelder F

Agavaceae Liliopsida Manfreda variegata Rattlesnake Master R

Agavaceae Liliopsida Yucca arkansana Arkansas Yucca I

Agavaceae Liliopsida Yucca louisianensis Louisiana Yucca I

Agavaceae Liliopsida Yucca treculeana Spanish Dagger R

Alismataceae Liliopsida Echinodorus cordifolius Burhead I

Alismataceae Liliopsida Sagittaria graminea Grassy Arrowhead F

Alismataceae Liliopsida Sagittaria graminea Grassy Arrowhead F ssp. graminea
Alismataceae Liliopsida Sagittaria platyphylla Delta Arrowhead I

Amaranthaceae Magnoliopsida Alternanthera philoxeroides Alligator-weed R

Amaranthaceae Magnoliopsida Amaranthus albus Tumbleweed Amaranth R

Amaranthaceae Magnoliopsida Amaranthus palmeri Palmer Amaranth I

Amaranthaceae Magnoliopsida Amaranthus polygonoides Tropical Amaranth I

Amaranthaceae Magnoliopsida Amaranthus rudis Weedy Amaranth F

Amaranthaceae Magnoliopsida Amaranthus spinosus Spiny Amaranth I

Amaranthaceae Magnoliopsida Amaranthus viridis Green Amaranth I

Amaranthaceae Magnoliopsida Froelichia drummondii Drummond Snakecotton -

Amaranthaceae Magnoliopsida Froelichia floridana Florida Snakecotton F

Amaranthaceae Magnoliopsida Froelichia floridana Florida Snakecotton F var. campestris
Amaranthaceae Magnoliopsida Gossypianthus lanuginosus Woolly Cottonflower R var. lanuginosus
Amaranthaceae Magnoliopsida Iresine rhizomatosa Rootstock Bloodleaf I

Anacardiaceae Magnoliopsida Rhus aromatica Fragrant Sumac I var. serotina
Anacardiaceae Magnoliopsida Rhus copallina Flameleaf Sumac F

Anacardiaceae Magnoliopsida Rhus glabra Smooth Sumac I

Anacardiaceae Magnoliopsida Toxicodendron radicans Poison Ivy C ssp. radicans
Apiaceae Magnoliopsida Bowlesia incana Hoary Bowlesia R

Apiaceae Magnoliopsida Chaerophyllum tainturieri Hairyfruit Chervil C var. dasycarpum
Apiaceae Magnoliopsida Chaerophyllum tainturieri Chervil C var. tainturieri
Apiaceae Magnoliopsida Cicuta maculata Spotted Water-hemlock I

Apiaceae Magnoliopsida Cicuta maculata Spotted Water-hemlock I var. maculata
Apiaceae Magnoliopsida Cyclospermum leptophyllum Slimlobe Celery I

Apiaceae Magnoliopsida Cynosciadum digitatum Finger Dogshade I

Apiaceae Magnoliopsida Daucus pusillus Rattlesnake Weed C

Apiaceae Magnoliopsida Eryngium hookeri Hooker Eryngo F

Apiaceae Magnoliopsida Eryngium prostratum Creeping Eryngo I

Apiaceae Magnoliopsida Eryngium yuccifolium Button Snakeroot I var. yuccifolium
Apiaceae Magnoliopsida Hydrocotyle ranunculoides Floating Water-pennywort I

Apiaceae Magnoliopsida Hydrocotyle umbellata Umbrella Water-pennywort R

Apiaceae Magnoliopsida Hydrocotyle verticillata Whorled Water-pennywort I var. triradiata
Apiaceae Magnoliopsida Hydrocotyle verticillata Whorled Water-pennywort I var. verticillata
Apiaceae Magnoliopsida Limnosciadum pinnatum Arkansas Dogshade I

Apiaceae Magnoliopsida Limnosciadum pumilum Prairie Dogshade I

Apiaceae Magnoliopsida Polytaenia nuttallii Prairie Parsley F

Apiaceae Magnoliopsida Polytaenia texana Texas Prairie Parsley I

Apiaceae Magnoliopsida Ptilimnium nuttallii Nuttall Mock Bishops Weed C

Apiaceae Magnoliopsida Sanicula canadensis Canada Snakeroot I

Apiaceae Magnoliopsida Spermolepis divaricata Forked Scaleseed I

Apiaceae Magnoliopsida Spermolepis inermis Spreading Scaleseed I

Apiaceae Magnoliopsida Torilis arvensis Hedgeparsley I

Apiaceae Magnoliopsida Trepocarpus aethusae - I

Apocynaceae Magnoliopsida Amsonia illustris Blue Star F

Apocynaceae Magnoliopsida Apocynum cannabinum Dogbane I

Apocynaceae Magnoliopsida Trachelospermum difforme Climbing Dogbane F

Aquifoliaceae Magnoliopsida Ilex decidua Possum-haw C

Aquifoliaceae Magnoliopsida Ilex longipes Georgia Holly - var. hirsuta
Aquifoliaceae Magnoliopsida Ilex opaca American Holly I

Aquifoliaceae Magnoliopsida Ilex vomitoria Yaupon Holly C

Araceae Liliopsida Arisaema dracontium Green Dragon I

Araliaceae Magnoliopsida Aralia spinosa Devil's Walking Stick R

Araliaceae Magnoliopsida Hedera helix English Ivy R

Arecaceae Liliopsida Sabal minor Small Palmetto I

Aristolochiaceae Magnoliopsida Aristolochia serpentaria Virginia Dutchman's Pipe R var. hastata
Aristolochiaceae Magnoliopsida Aristolochia tomentosa Woolly Pipe-vine I

Asclepiadaceae Magnoliopsida Asclepias amplexicaulis Blunt-leaf Milkweed I

Asclepiadaceae Magnoliopsida Asclepias obovata Milkweed R

Asclepiadaceae Magnoliopsida Asclepias onotherioides Primrose Milkweed F

Asclepiadaceae Magnoliopsida Asclepias tuberosa Butterfly Milkweed I

Asclepiadaceae Magnoliopsida Asclepias verticillata Whorled Milkweed I

Asclepiadaceae Magnoliopsida Asclepias viridiflora Green Antelope Horn R

Asclepiadaceae Magnoliopsida Asclepias viridis Antelope Horn C

Asclepiadaceae Magnoliopsida Cynanchum laeve Smooth Swallow-wort R

Asclepiadaceae Magnoliopsida Matelea cyanchoides Sand Milkvine I

Asclepiadaceae Magnoliopsida Matelea gonocarpos Milkvine F

Aspleniaceae Pteridophyta Asplenium platyneuron Ebony Spleenwort F

Asteraceae Magnoliopsida Achillea millefolium Yarrow R var. occidentalis
Asteraceae Magnoliopsida Ambrosia artemisiifolia Common Ragweed I

Asteraceae Magnoliopsida Ambrosia psilostachya Western Ragweed F

Asteraceae Magnoliopsida Ambrosia trifida Giant Ragweed C

Asteraceae Magnoliopsida Amphiachyris dracunculoides Annual Broomweed F

Asteraceae Magnoliopsida Arnoglossum plantagineum Indian Plantain I

Asteraceae Magnoliopsida Artemesia ludoviciana Louisiana Sagewort I

Asteraceae Magnoliopsida Aster drummondii Texas Aster I var. texanus
Asteraceae Magnoliopsida Aster ericoides Heath Aster F

Asteraceae Magnoliopsida Aster fragilis Aster I

Asteraceae Magnoliopsida Aster lanceolatus Aster I

Asteraceae Magnoliopsida Aster lateriflorus California Aster I

Asteraceae Magnoliopsida Aster ootlentangiensis Azure Aster I

Asteraceae Magnoliopsida Aster patens Skydrop Aster C

Asteraceae Magnoliopsida Aster patens Skydrop Aster C var. gracilis
Asteraceae Magnoliopsida Aster patens Skydrop Aster C var. patens
Asteraceae Magnoliopsida Aster patens Skydrop Aster C var. patentissimus
Asteraceae Magnoliopsida Aster praealtus Tall Aster I

Asteraceae Magnoliopsida Aster sericeus Silky Aster F var. microphyllus
Asteraceae Magnoliopsida Aster subulatus Lawn Aster I var. ligulatus
Asteraceae Magnoliopsida Astranthium integrifolium Western Daisy I

Asteraceae Magnoliopsida Astranthium integrifolium Western Daisy I ssp. ciliatum
Asteraceae Magnoliopsida Baccharis halmifolia Eastern Baccharis I

Asteraceae Magnoliopsida Baccharis neglecta Roosevelt-weed I

Asteraceae Magnoliopsida Berlandiera pumila Soft Greeneyes I

Asteraceae Magnoliopsida Bidens bipinnata Spanish Needles I

Asteraceae Magnoliopsida Bigelowia nuttallii Slender Bigelowia R

Asteraceae Magnoliopsida Boltonia asteroides White Boltonia I

Asteraceae Magnoliopsida Boltonia diffusa Small Boltonia F

Asteraceae Magnoliopsida Calyptocarpus vialis Horseherb I

Asteraceae Magnoliopsida Centaurea americana American Basketflower I

Asteraceae Magnoliopsida Chaetopappa asteroides Common Least Daisy I

Asteraceae Magnoliopsida Chrysopsis pilosa Soft Goldaster C

Asteraceae Magnoliopsida Cirsium altissimum Iowa Thistle -

Asteraceae Magnoliopsida Cirsium engelmannii Engelman Thistle I

Asteraceae Magnoliopsida Cirsium horridulum Bull Thistle F

Asteraceae Magnoliopsida Cirsium texanum Southern Thistle I

Asteraceae Magnoliopsida Conyza canadensis Horsetail I

Asteraceae Magnoliopsida Conyza canadensis Horsetail I var. canadensis
Asteraceae Magnoliopsida Conyza canadensis Horsetail I var. glabrata
Asteraceae Magnoliopsida Coreopsis basalis Goldenmane Tickseed F

Asteraceae Magnoliopsida Coreopsis grandiflora Bigflower Tickseed F var. longipes
Asteraceae Magnoliopsida Croptilon divariticum Slender Scratch Daisy I

Asteraceae Magnoliopsida Croptilon rigidifolium Scratch Daisy I

Asteraceae Magnoliopsida Dracopsis amplexicaulis Clasping Coneflower I

Asteraceae Magnoliopsida Echinacea angustifolia Black Sampson R var. angustifolia
Asteraceae Magnoliopsida Echinacea sanguinea Purple Coneflower R

Asteraceae Magnoliopsida Eclipta prostrata Yerba de Tago I

Asteraceae Magnoliopsida Elephantopus carolinianus Leafy Elephantfoot F

Asteraceae Magnoliopsida Engelmannia pinnatifida Engelmann Daisy F

Asteraceae Magnoliopsida Erigeron modestus Plains Fleabane I

Asteraceae Magnoliopsida Erigeron strigosus Prairie Fleabane C

Asteraceae Magnoliopsida Erigeron strigosus Prairie Fleabane C var. beyrichii
Asteraceae Magnoliopsida Erigeron strigosus Prairie Fleabane C var. strigosus
Asteraceae Magnoliopsida Erigeron tenuis Slender Fleabane F

Asteraceae Magnoliopsida Eupatorium capillifolium Dog-fennel I

Asteraceae Magnoliopsida Eupatorium coelestinum Mistflower I

Asteraceae Magnoliopsida Eupatorium compositifolium Yankeeweed F

Asteraceae Magnoliopsida Eupatorium incarnatum Pink Boneset I

Asteraceae Magnoliopsida Eupatorium semiserratum Boneset I

Asteraceae Magnoliopsida Eupatorium serotinum Late Boneset C

Asteraceae Magnoliopsida Eurybia hemispherica Low Aster I

Asteraceae Magnoliopsida Euthamia leptocephala - I

Asteraceae Magnoliopsida Evax candida Silver Rabbit-tobacco F

Asteraceae Magnoliopsida Evax prolifera Bighead Rabbit-tobacco I

Asteraceae Magnoliopsida Evax verna Manystem Rabbit-tobacco I

Asteraceae Magnoliopsida Facelis retusa - I

Asteraceae Magnoliopsida Gaillardia pulchella Indian Blanket I

Asteraceae Magnoliopsida Gnaphalium falcatum Cudweed I

Asteraceae Magnoliopsida Gnaphalium obtusifolium Fragrant Cudweed F

Asteraceae Magnoliopsida Gnaphalium pensylvanicum Pennsylvania Cudweed F

Asteraceae Magnoliopsida Gnaphalium purpureum Purple Cudweed I

Asteraceae Magnoliopsida Helenium amarum Sneezeweed F

Asteraceae Magnoliopsida Helenium amarum Sneezeweed F var. amarum
Asteraceae Magnoliopsida Helenium flexuosum Purplehead Sneezeweed R

Asteraceae Magnoliopsida Helenium microcephalum Smallhead Sneezeweed R

Asteraceae Magnoliopsida Helianthus annuus Sunflower I

Asteraceae Magnoliopsida Helianthus debilis Cucumberleaf Sunflower I ssp. cucumerifolius
Asteraceae Magnoliopsida Helianthus grosseserratus Sawtooth Sunflower I

Asteraceae Magnoliopsida Helianthus hirsutus Hairy Sunflower I

Asteraceae Magnoliopsida Heterotheca mariana Maryland Camphorweed I

Asteraceae Magnoliopsida Heterotheca subaxillaris Camphorweed C var. latifolia
Asteraceae Magnoliopsida Heterotheca subaxillaris Camphorweed C var. subaxillaris
Asteraceae Magnoliopsida Hieracium gronovii Hawkweed R

Asteraceae Magnoliopsida Hymenopappus scabiosaeus Ragweed Woolly-white C var. artemisiifolius
Asteraceae Magnoliopsida Hymenopappus scabiosaeus Flattop Woolly-white C var. scabiosaeus
Asteraceae Magnoliopsida Iva angustifolia Narrowleaf Marshelder C

Asteraceae Magnoliopsida Iva annua Marshelder C

Asteraceae Magnoliopsida Krigia cespitosa Weedy Dwarf Dandelion F

Asteraceae Magnoliopsida Krigia dandelion Tuber Dwarf Dandelion I

Asteraceae Magnoliopsida Krigia gracilis Dwarf Dandelion C

Asteraceae Magnoliopsida Krigia occidentalis Western Dwarf Dandelion I

Asteraceae Magnoliopsida Krigia virginica Virginia Dwarf Dandelion I

Asteraceae Magnoliopsida Lactuca canadensis Wild Lettuce F

Asteraceae Magnoliopsida Lactuca floridana Florida Lettuce I

Asteraceae Magnoliopsida Lactuca hirsuta Hairy Lettuce I var. albiflora
Asteraceae Magnoliopsida Lactuca ludoviciana Wild Lettuce I

Asteraceae Magnoliopsida Lactuca serriola Prickly Lettuce I

Asteraceae Magnoliopsida Liatris cymosa Branched Gayfeather R

Asteraceae Magnoliopsida Liatris elegans Pinkscale Gayfeather R

Asteraceae Magnoliopsida Liatris mucronata Gayfeather I

Asteraceae Magnoliopsida Liatris squarrosa Gayfeather F

Asteraceae Magnoliopsida Liatris squarrosa Gayfeather F var. alabamensis
Asteraceae Magnoliopsida Mikania scandens Climbing Hemp I

Asteraceae Magnoliopsida Oligoneuron nitidum Flat-top Goldenrod I

Asteraceae Magnoliopsida Packera obovata Golden Groundsel R

Asteraceae Magnoliopsida Packera tampicana Butterweed F

Asteraceae Magnoliopsida Palafoxia rosea Rose Palafoxia F

Asteraceae Magnoliopsida Palafoxia rosea Rose Palafoxia F var. rosea
Asteraceae Magnoliopsida Palafoxia texana Texas Palafoxia I var. ambigua
Asteraceae Magnoliopsida Palafoxia texana Texas Palafoxia I var. texana
Asteraceae Magnoliopsida Pluchea camphorata Camphor Marsh-fleabane F

Asteraceae Magnoliopsida Pluchea foetida Stinking Marsh-fleabane R

Asteraceae Magnoliopsida Pluchea odorata Purple Marsh-fleabane I

Asteraceae Magnoliopsida Pterocaulon virgatum Wand Blackroot I

Asteraceae Magnoliopsida Pyrrhopappus carolinianus Carolina False Dandelion F

Asteraceae Magnoliopsida Pyrrhopappus multicaulis Manystem False Dandelion I

Asteraceae Magnoliopsida Ratibida columnifera Mexican-hat R

Asteraceae Magnoliopsida Rudbeckia grandiflora Rough Coneflower I

Asteraceae Magnoliopsida Rudbeckia grandiflora Rough Coneflower I var. alismifolia
Asteraceae Magnoliopsida Rudbeckia hirta Black-eyed Susan C

Asteraceae Magnoliopsida Rudbeckia hirta Black-eyed Susan C var. angustifolia
Asteraceae Magnoliopsida Rudbeckia hirta Black-eyed Susan C var. pulcherrima
Asteraceae Magnoliopsida Rudbeckia maxima Great Coneflower I

Asteraceae Magnoliopsida Senecio ampullaceus Texas Groundsel C

Asteraceae Magnoliopsida Silphium gracile Simpson Rosinweed F

Asteraceae Magnoliopsida Silphium radula Roughstem Rosinweed F

Asteraceae Magnoliopsida Solidago canadensis Common Goldenrod I var. gilvocanescens
Asteraceae Magnoliopsida Solidago canadensis Common Goldenrod I var. scabra
Asteraceae Magnoliopsida Solidago gigantea Giant Goldenrod I var. serotina
Asteraceae Magnoliopsida Solidago nemoralis Oldfield Goldenrod I var. nemoralis
Asteraceae Magnoliopsida Solidago radula Rough Goldenrod F

Asteraceae Magnoliopsida Solidago rugosa Wrinkled Goldenrod I

Asteraceae Magnoliopsida Solidago salicina Willowleaf Goldenrod F

Asteraceae Magnoliopsida Solidago speciosa Noble Goldenrod I var. rigidiuscula
Asteraceae Magnoliopsida Solidago ulmifolia Elmleaf Goldenrod C

Asteraceae Magnoliopsida Solidago ulmifolia Elmleaf Goldenrod C var. microphylla
Asteraceae Magnoliopsida Soliva pterosperma Burweed -

Asteraceae Magnoliopsida Soliva sessilis Burweed I

Asteraceae Magnoliopsida Soliva stolonifera Burweed I

Asteraceae Magnoliopsida Sonchus asper Prickly Sowthistle F

Asteraceae Magnoliopsida Taraxacum officinale Dandelion I

Asteraceae Magnoliopsida Tetraneuris scaposa Bitterweed -

Asteraceae Magnoliopsida Verbesina encelioides Cowpen Daisy I

Asteraceae Magnoliopsida Verbesina virginica Frostweed F

Asteraceae Magnoliopsida Vernonia baldwinii Baldwin Ironweed I

Asteraceae Magnoliopsida Vernonia missurica Missouri Ironweed -

Asteraceae Magnoliopsida Vernonia texana Texas Ironweed F

Asteraceae Magnoliopsida Xanthium strumarium Cocklebur I

Azollaceae Pteridophyta Azolla caroliniana Water Fern I

Berberidaceae Magnoliopsida Nandina domestica Heavenly Bamboo R

Betulaceae Magnoliopsida Betula nigra River Birch I

Bignoniaceae Magnoliopsida Campsis radicans Trumpet-creeper C

Bignoniaceae Magnoliopsida Catalpa bignonioides Southern Cigar-tree I

Blechnaceae Pteridophyta Woodwardia areolata Chain Fern I

Boraginaceae Magnoliopsida Buglossoides arvensis Bugloss I

Boraginaceae Magnoliopsida Heliotropium indicum Turnsole F

Boraginaceae Magnoliopsida Heliotropium procumbens Fourspike Heliotrope I

Boraginaceae Magnoliopsida Lithospermum incisum Narrowleaf Puccoon I

Boraginaceae Magnoliopsida Myosotis macrosperma Spring Forget-me-not F var. macrosperma
Boraginaceae Magnoliopsida Myosotis verna Early Scorpion-grass I

Boraginaceae Magnoliopsida Onosmodium molle Western Marbleseed R ssp. occidentale
Brassicaceae Magnoliopsida Brassica rapa Turnip R

Brassicaceae Magnoliopsida Capsella bursa-pastoris Shephard's Purse C

Brassicaceae Magnoliopsida Cardamine hirsuta Hairy Bittercress I

Brassicaceae Magnoliopsida Cardamine parviflora Sand Bittercress C var. arenicola
Brassicaceae Magnoliopsida Draba brachycarpa Shortpod Draba I

Brassicaceae Magnoliopsida Lepidium densiflorum Prairie Pepperweed I

Brassicaceae Magnoliopsida Lepidium virginicum Virginia Pepperweed F var. medium
Brassicaceae Magnoliopsida Lepidium virginicum Virginia Pepperweed F var. virginicum
Brassicaceae Magnoliopsida Neobeckia aquatica Water Horseradish R

Brassicaceae Magnoliopsida Rapistrum rugosum - I

Brassicaceae Magnoliopsida Rorippa sessiliflora Stalkless Yellowcress I

Bromeliaceae Liliopsida Tillandsia recurvata Ball-moss R

Bromeliaceae Liliopsida Tillandsia usneoides Spanish-moss I

Buddlejaceae Magnoliopsida Polypremum procumbens Juniperleaf F