The Vascular Flora of Madison County, Texas


Browsing the flora by genus:

A-C     D-H     I-P     Q-S     T-Z


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

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Genus Specific epithet Family Division Common name Abundance var./ ssp. Sub-specific tax. division
Ilex decidua Aquifoliaceae Magnoliopsida Possum-haw C

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

Ilex vomitoria Aquifoliaceae Magnoliopsida Yaupon Holly C

Ipomoea cordatotriloba Convolvulaceae Magnoliopsida Bindweed F

Ipomoea cordatotriloba Convolvulaceae Magnoliopsida Bindweed F var. cordatotriloba
Ipomoea lacunosa Convolvulaceae Magnoliopsida Pitted Morning-glory F

Ipomoea pandurata Convolvulaceae Magnoliopsida Bigroot Morning-glory I

Ipomopsis rubra Polemoniaceae Magnoliopsida Standing Cypress R

Iresine rhizomatosa Amaranthaceae Magnoliopsida Rootstock Bloodleaf I

Iris hexagona Iridaceae Liliopsida Dixie Iris I var. flexicaulis
Iris pallida Iridaceae Liliopsida Bearded Iris I

Isoetes melanopoda Isoetaceae Pteridophyta Quillwort I

Isolepis carinata Cyperaceae Liliopsida Small Bulrush F

Isolepis molesta Cyperaceae Liliopsida Small Bulrush I

Iva angustifolia Asteraceae Magnoliopsida Narrowleaf Marshelder C

Iva annua Asteraceae Magnoliopsida Marshelder C

Jacquemontia tamnifolia Convolvulaceae Magnoliopsida Hairy Clustervine -

Juglans nigra Juglandaceae Magnoliopsida Black Walnut I

Juncus acuminatus Juncaceae Liliopsida Knotleaf Rush F

Juncus acuminatus Juncaceae Liliopsida Knotleaf Rush F f. sphaerocephalus
Juncus brachycarpus Juncaceae Liliopsida Whiteroot Rush I

Juncus bufonius Juncaceae Liliopsida Toad Rush -

Juncus capitatus Juncaceae Liliopsida Capped Rush I

Juncus debilis Juncaceae Liliopsida Weak Rush I

Juncus dichotomous Juncaceae Liliopsida Forked Rush F

Juncus diffusissimus Juncaceae Liliopsida Slimpod Rush I

Juncus dudleyi Juncaceae Liliopsida Dudley Rush I

Juncus effusus Juncaceae Liliopsida Common Rush C var. solutus
Juncus interior Juncaceae Liliopsida Inland Rush I

Juncus marginatus Juncaceae Liliopsida Grassleaf Rush F

Juncus repens Juncaceae Liliopsida Creeping Rush R

Juncus scirpoides Juncaceae Liliopsida Needlepod Rush I

Juncus tenuis Juncaceae Liliopsida Slender Rush I

Juncus validus Juncaceae Liliopsida Roundhead Rush C

Juncus validus Juncaceae Liliopsida Roundhead Rush C var. validus
Juniperus virginiana Cupressaceae Pinophyta Eastern Red Cedar F

Justicia americana Acanthaceae Magnoliopsida American Water-willow I

Justicia ovata Acanthaceae Magnoliopsida Lanceleaved Water-willow F var. lanceolata
Krameria lanceolata Krameriaceae Magnoliopsida Rattany-vine I

Krigia cespitosa Asteraceae Magnoliopsida Weedy Dwarf Dandelion F

Krigia dandelion Asteraceae Magnoliopsida Tuber Dwarf Dandelion I

Krigia gracilis Asteraceae Magnoliopsida Dwarf Dandelion C

Krigia occidentalis Asteraceae Magnoliopsida Western Dwarf Dandelion I

Krigia virginica Asteraceae Magnoliopsida Virginia Dwarf Dandelion I

Kyllinga odorata Cyperaceae Liliopsida Fragrant Flatsedge I

Lactuca canadensis Asteraceae Magnoliopsida Wild Lettuce F

Lactuca floridana Asteraceae Magnoliopsida Florida Lettuce I

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

Lactuca serriola Asteraceae Magnoliopsida Prickly Lettuce I

Lagerstroemia indica Lythraceae Magnoliopsida Crepe Myrtle I

Lamium amplexicaule Lamiaceae Magnoliopsida Henbit F

Lantana camara Verbenaceae Magnoliopsida West-Indian Lantana I

Lantana urticoides Verbenaceae Magnoliopsida Lantana I

Lathryus hirsutus Fabaceae Magnoliopsida Singletary Pea F

Lathyrus pusillus Fabaceae Magnoliopsida Low Pea I

Lechea mucronata Cistaceae Magnoliopsida Hairy Pinweed F

Lechea san-sabeana Cistaceae Magnoliopsida San Saba Pinweed I

Lechea tenuifolia Cistaceae Magnoliopsida Narrowleaf Pinweed F

Leersia lenticularis Poaceae Liliopsida Catchfly Grass I

Leersia virginica Poaceae Liliopsida Whitegrass I

Lemna minima Lemnaceae Liliopsida Duckweed I

Lepidium densiflorum Brassicaceae Magnoliopsida Prairie Pepperweed I

Lepidium virginicum Brassicaceae Magnoliopsida Virginia Pepperweed F var. medium
Lepidium virginicum Brassicaceae Magnoliopsida Virginia Pepperweed F var. virginicum
Lepuropetalon spathulatum Saxifragacae Magnoliopsida Petite-plant I

Lespedeza cuneata Fabaceae Magnoliopsida Sericea Bushclover I

Lespedeza hirta Fabaceae Magnoliopsida Hairy Bushclover I

Lespedeza repens Fabaceae Magnoliopsida Creeping Bushclover I

Lespedeza striata Fabaceae Magnoliopsida Japanese Bushclover I

Lespedeza stuevei Fabaceae Magnoliopsida Stueve Bushclover F

Lespedeza virginica Fabaceae Magnoliopsida Slender Bushclover I

Leucospora multifida Scrophulariaceae Magnoliopsida Narrowleaf Conobea I

Liatris cymosa Asteraceae Magnoliopsida Branched Gayfeather R

Liatris elegans Asteraceae Magnoliopsida Pinkscale Gayfeather R

Liatris mucronata Asteraceae Magnoliopsida Gayfeather I

Liatris squarrosa Asteraceae Magnoliopsida Gayfeather F

Liatris squarrosa Asteraceae Magnoliopsida Gayfeather F var. alabamensis
Ligustrum lucidum Oleaceae Magnoliopsida Wax-leaf Ligustrum R

Ligustrum sinense Oleaceae Magnoliopsida Chinese Privet C

Limnosciadum pinnatum Apiaceae Magnoliopsida Arkansas Dogshade I

Limnosciadum pumilum Apiaceae Magnoliopsida Prairie Dogshade I

Linaria canadensis Scrophulariaceae Magnoliopsida Oldfield Toadflax C var. canadensis
Linaria canadensis Scrophulariaceae Magnoliopsida Texas Toadflax C var. texana
Lindernia dubia Scrophulariaceae Magnoliopsida Clasping False Pimpernel I var. anagallidea
Linum medium Linaceae Magnoliopsida Texas Flax C var. texanum
Liquidambar styraciflua Hamamelidaceae Magnoliopsida Sweet Gum I

Liriope spicata Liliaceae Liliopsida Creeping Lilyturf R

Lithospermum incisum Boraginaceae Magnoliopsida Narrowleaf Puccoon I

Lobelia appendiculata Campanulaceae Magnoliopsida Earflower Lobelia F

Lobelia cardinalis Campanulaceae Magnoliopsida Cardinal Flower R

Lobelia puberula Campanulaceae Magnoliopsida Downy Lobelia I var. pauciflora
Lobelia puberula Campanulaceae Magnoliopsida Downy Lobelia I var. puberula
Loeflingia squarrosa Caryophyllaceae Magnoliopsida Spreading Loeflingia R

Lolium perenne Poaceae Liliopsida Perennial Ryegrass C

Lonicera japonica Caprifoliaceae Magnoliopsida Japanese Honeysuckle C

Lonicera sempervirens Caprifoliaceae Magnoliopsida Scarlet Honeysuckle I

Lotus  unifoliatus Fabaceae Magnoliopsida Pursh Deervetch R var. unifoliatus
Ludwigia alternifolia Onagraceae Magnoliopsida Bushy Seedbox I

Ludwigia decurrens Onagraceae Magnoliopsida Primrose-willow I

Ludwigia glandulosa Onagraceae Magnoliopsida Torrey Seedbox I ssp. brachycarpa
Ludwigia glandulosa Onagraceae Magnoliopsida Torrey Seedbox I ssp. glandulosa
Ludwigia palustris Onagraceae Magnoliopsida American Seedbox C

Ludwigia peploides Onagraceae Magnoliopsida Smooth Water-primrose C

Lupinus subcarnosus Fabaceae Magnoliopsida Texas Bluebonnet C

Lupinus texensis Fabaceae Magnoliopsida Texas Bluebonnet F

Luzula bulbosa Juncaceae Liliopsida Bulb Woodrush I

Lycopus rubellus Lamiaceae Magnoliopsida Arkansas Bugleweed I

Lygodium japonicum Schizaeaceae Pteridophyta Japanese Climbing Fern R

Lythrum alatum Lythraceae Magnoliopsida Lanceleaf Loosestrife I var. lanceolatum
Maclura pomifera Moraceae Magnoliopsida Bois D'Arc I

Malvaviscus arboreus Malvaceae Magnoliopsida Drummond Turk's-cap F var. drummondii
Manfreda variegata Agavaceae Liliopsida Rattlesnake Master R

Marsilea macropoda Marsileaceae Pteridophyta Water-clover R

Matelea cyanchoides Asclepiadaceae Magnoliopsida Sand Milkvine I

Matelea gonocarpos Asclepiadaceae Magnoliopsida Milkvine F

Mecardonia acuminata Scrophulariaceae Magnoliopsida Sawtooth Water-hyssop I

Mecardonia procumbens Scrophulariaceae Magnoliopsida Prostrate Water-hyssop I

Medicago arabica Fabaceae Magnoliopsida Spotted Medic I

Medicago lupulina Fabaceae Magnoliopsida Black Medic I

Medicago orbicularis Fabaceae Magnoliopsida Button Clover F

Medicago polymorpha Fabaceae Magnoliopsida Medic F

Medicago sativa Fabaceae Magnoliopsida Alfalfa I

Melia azedarach Meliaceae Magnoliopsida Chinaberry F

Melica mutica Poaceae Liliopsida Twoflower Melic F

Melilotus indicus Fabaceae Magnoliopsida Yellow Sweetclover C

Melilotus officinalis Fabaceae Magnoliopsida Yellow Sweetclover -

Melothria pendula Cucurbitaceae Magnoliopsida Melonette F

Mikania scandens Asteraceae Magnoliopsida Climbing Hemp I

Mimosa nuttallii Mimosaceae Magnoliopsida Catclaw Sensitive-briar F

Mimosa strigillosa Mimosaceae Magnoliopsida Herbaceous Mimosa I

Mirabilis albida Nyctaginaceae Magnoliopsida White Four-O'Clock F

Mirabilis jalapa Nyctaginaceae Magnoliopsida Four-O'Clock R

Mirabilis linearis Nyctaginaceae Magnoliopsida Linearleaf Four-O'Clock I

Mirabilis nyctaginea Nyctaginaceae Magnoliopsida Wild Four-O'Clock I

Mitchella repens Rubiaceae Magnoliopsida Partridge-berry I

Modiola caroliniana Malvaceae Magnoliopsida Carolina Modiola C

Mollugo verticillata Molluginaceae Magnoliopsida Green Carpetweed F

Monarda citriodora Lamiaceae Magnoliopsida Lemon Beebalm F ssp. citriodora
Monarda clinopodioides Lamiaceae Magnoliopsida Basil Beebalm I

Monarda fistulosa Lamiaceae Magnoliopsida Wild Bergamot F

Monarda lindheimeri Lamiaceae Magnoliopsida Lindheimer Bergamot I

Monarda punctata Lamiaceae Magnoliopsida Spotted Beebalm F var. intermedia
Monarda punctata Lamiaceae Magnoliopsida Spotted Beebalm F var. lasiodonta
Morus rubra Moraceae Magnoliopsida Red Mulberry F

Muhlenbergia capillaris Poaceae Liliopsida Hairyawn Muhly I

Muhlenbergia schreiberi Poaceae Liliopsida Nimblewill -

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

Myosurus minimus Ranunculaceae Magnoliopsida Tiny Mousetail I

Myrica cerifera Myricaceae Magnoliopsida Southern Wax-myrtle I

Myriophyllum heterophyllum Haloragaceae Magnoliopsida Changeleaf Parrot's Feather F

Myriophyllum pinnatum Haloragaceae Magnoliopsida Green Parrot's Feather I

Najas guadalupensis Najadaceae Liliopsida Southern Naiad R

Nandina domestica Berberidaceae Magnoliopsida Heavenly Bamboo R

Narcissus jonquilla Liliaceae Liliopsida Jonquil I

Nasella leucotricha Poaceae Liliopsida Texas Wintergrass F

Nelumbo lutea Nelumbonaceae Magnoliopsida Yellow Lotus R

Nemophila aphylla Hydrophyllaceae Magnoliopsida Smallflower Nemophila I

Neobeckia aquatica Brassicaceae Magnoliopsida Water Horseradish R

Neptunia lutea Mimosaceae Magnoliopsida Yellow Neptunia I

Neptunia pubescens Mimosaceae Magnoliopsida Prairie Neptunia I var. pubescens
Nothoscordum bivalve Liliaceae Liliopsida Crow-poison C

Nuphar lutea Nymphaeaceae Magnoliopsida Spatterdock I ssp. advena
Nymphaea odorata Nymphaeaceae Magnoliopsida American Waterlily R ssp. odorata
Nyssa sylvatica Nyssaceae Magnoliopsida Black Tupelo I var. sylvatica
Oenothera heterophylla Onagraceae Magnoliopsida Varileaf Evening Primrose I ssp. heterophylla
Oenothera laciniata Onagraceae Magnoliopsida Cutleaf Evening Primrose C

Oenothera linifolia Onagraceae Magnoliopsida Threadleaf Sundrops I

Oenothera spachiana Onagraceae Magnoliopsida Spach Evening Primrose I

Oenothera speciosa Onagraceae Magnoliopsida Showy Evening Primrose F

Oldenlandia boscii Rubiaceae Magnoliopsida - I

Oldenlandia uniflora Rubiaceae Magnoliopsida - R

Oligoneuron nitidum Asteraceae Magnoliopsida Flat-top Goldenrod I

Onoclea sensibilis Dryopteridaceae Pteridophyta Sensitive Fern I

Onosmodium molle Boraginaceae Magnoliopsida Western Marbleseed R ssp. occidentale
Ophioglossum crotalophoroides Ophioglossaceae Pteridophyta Heartleaf Adder's Tongue -

Oplismenus hirtellus Poaceae Liliopsida Basketgrass I

Opuntia humifusa Cactaceae Magnoliopsida Eastern Prickly-pear I var. humifusa
Opuntia lindheimeri Cactaceae Magnoliopsida Cowtongue Prickly-pear R var. linguiformis
Opuntia macrorhiza Cactaceae Magnoliopsida Plains Prickly-pear I var. macrorhiza
Orbexilum pedunculatum Fabaceae Magnoliopsida Sampson's Snakeroot R var. pedunculatum
Orbexilum simplex Fabaceae Magnoliopsida Singlestem Snakeroot I

Orobanche multiflora Orobanchaceae Magnoliopsida Largeflower Broomrape I

Osmunda cinnamomea Osmundaceae Pteridophyta Cinnamon Fern R

Oxalis corniculata Oxalidaceae Magnoliopsida Creeping Woodsorrel I

Oxalis dillenii Oxalidaceae Magnoliopsida Dillen Woodsorrel F

Oxalis rubra Oxalidaceae Magnoliopsida Pink Shamrock R

Oxalis stricta Oxalidaceae Magnoliopsida Yellow Woodsorrel C

Oxalis violacea Oxalidaceae Magnoliopsida Violet Woodsorrel I

Packera obovata Asteraceae Magnoliopsida Golden Groundsel R

Packera tampicana Asteraceae Magnoliopsida Butterweed F

Palafoxia rosea Asteraceae Magnoliopsida Rose Palafoxia F

Palafoxia rosea Asteraceae Magnoliopsida Rose Palafoxia F var. rosea
Palafoxia texana Asteraceae Magnoliopsida Texas Palafoxia I var. ambigua
Palafoxia texana Asteraceae Magnoliopsida Texas Palafoxia I var. texana
Panicum anceps Poaceae Liliopsida Beaked Panicum I

Panicum brachyanthum Poaceae Liliopsida Pimple Panicum I

Panicum dichotomiflorum Poaceae Liliopsida Fall Panicum F

Panicum diffusum Poaceae Liliopsida Spreading Panicum -

Panicum gymnocarpon Poaceae Liliopsida Savannah Panicum I

Panicum hallii Poaceae Liliopsida Halls Panicum - var. hallii
Panicum hians Poaceae Liliopsida Gaping Panicum C

Panicum rigidulum Poaceae Liliopsida Redtop Panicum C

Panicum virgatum Poaceae Liliopsida Switchgrass I

Parietaria obtusa Urticaceae Magnoliopsida Pellitory I

Parietaria pensylvanica Urticaceae Magnoliopsida Pennsylvania Pellitory F

Parkinsonia aculeata Caesalpiniaceae Magnoliopsida Retama R

Paronychia lindheimeri Caryophyllaceae Magnoliopsida Lindheimer Nailwort R

Parthenocissus quinquefolia Vitaceae Magnoliopsida Virginia Creeper I

Paspalidium geminatum Poaceae Liliopsida Paspalidium I var. geminatum
Paspalum dilatatum Poaceae Liliopsida Dallisgrass F

Paspalum floridanum Poaceae Liliopsida Florida Paspalum F var. glabratum
Paspalum fluitans Poaceae Liliopsida Water Paspalum I

Paspalum laeve Poaceae Liliopsida Field Paspalum -

Paspalum notatum Poaceae Liliopsida Bahiagrass F var. notatum
Paspalum notatum Poaceae Liliopsida Bahiagrass F var. saurae
Paspalum plicatulum Poaceae Liliopsida Brownseed Paspalum C

Paspalum pubiflorum Poaceae Liliopsida Hairyseed Paspalum -

Paspalum setaceum Poaceae Liliopsida Thin Paspalum I var. setaceum
Paspalum setaceum Poaceae Liliopsida Thin Paspalum I var. stramineum
Paspalum urvillei Poaceae Liliopsida Vaseygrass I

Passiflora incarnata Passifloraceae Magnoliopsida Maypop F

Passiflora lutea Passifloraceae Magnoliopsida Yellow Passionflower F

Pediomelum hypogaeum Fabaceae Magnoliopsida Edible Scurfpea I var. subulatum
Pediomelum rhombifolium Fabaceae Magnoliopsida Roundleaf Scurfpea I

Penstemon australis Scrophulariaceae Magnoliopsida Southern Beardtongue I ssp. laxiflorus
Penthorum sedoides Saxifragaceae Magnoliopsida Ditch-Stonecrop I

Perilla frutescens Lamiaceae Magnoliopsida Beefsteak Plant I

Petrorhagia dubia Caryophyllaceae Magnoliopsida Childling Pink I

Phacelia glabra Hydrophyllaceae Magnoliopsida Smooth Phacelia I

Phacelia hirsuta Hydrophyllaceae Magnoliopsida Hairy Phacelia I

Phacelia patuliflora Hydrophyllaceae Magnoliopsida Sand Phacelia I

Phalaris caroliniana Poaceae Liliopsida Carolina Canarygrass F

Phlox cuspidata Polemoniaceae Magnoliopsida Pointed Phlox C

Phlox cuspidata Polemoniaceae Magnoliopsida Pointed Phlox C var. cuspidata
Phlox drummondii Polemoniaceae Magnoliopsida Drummond Phlox I var. peregrina
Phlox pilosa Polemoniaceae Magnoliopsida Downy Phlox R

Phoradendron tomentosum Viscaceae Magnoliopsida Mistletoe C

Phyla lanceolata Verbenaceae Magnoliopsida Lanceleaf Frogfruit C

Phyla nodiflora Verbenaceae Magnoliopsida Common Frogfruit F

Phyla nodiflora Verbenaceae Magnoliopsida Common Frogfruit F var. nodiflora
Phyllanthus abnormis Euphorbiaceae Magnoliopsida Drummond Leaf-flower I var. abnormis
Phyllanthus caroliniensis Euphorbiaceae Magnoliopsida Carolina Leaf-flower I ssp. carolinIensis
Phyllanthus pudens Euphorbiaceae Magnoliopsida Birdseed Leaf-flower I

Physalis cinerascens Solanaceae Magnoliopsida Beach Groundcherry F var. cinerascens
Physalis heterophylla Solanaceae Magnoliopsida Clammy Groundcherry I var. heterophylla
Physalis pubescens Solanaceae Magnoliopsida Downy Groundcherry C

Physalis pubescens Solanaceae Magnoliopsida Downy Groundcherry C var. integrifolia
Physostegia angustifolia Lamiaceae Magnoliopsida Obedient-plant I

Physostegia intermedia Lamiaceae Magnoliopsida Intermediate Obedient-plant F

Physostegia pulchella Lamiaceae Magnoliopsida Obedient-plant C

Phytolacca americana Phytolaccaceae Magnoliopsida Pokeweed I

Pinus echinata Pinaceae Pinophyta Shortleaf Pine R

Pinus taeda Pinaceae Pinophyta Loblolly Pine I

Piptochaetium avenaceum Poaceae Liliopsida Blackseed Needlegrass F

Planera aquatica Ulmaceae Magnoliopsida Water Elm F

Plantago aristata Plantaginaceae Magnoliopsida Bottlebrush Plantain C

Plantago heterophylla Plantaginaceae Magnoliopsida Simplespike Plantain I

Plantago hookeriana Plantaginaceae Magnoliopsida Hooker Plantain I

Plantago patagonica Plantaginaceae Magnoliopsida Bristlebract Plantain I

Plantago rhodosperma Plantaginaceae Magnoliopsida Redseed Plantain F

Plantago virginica Plantaginaceae Magnoliopsida Paleseed Plantain C

Plantago wrightiana Plantaginaceae Magnoliopsida Wright Plantain F

Platanus occidentalis Platanaceae Magnoliopsida American Sycamore I

Platycladus orientalis Cupressaceae Pinophyta Arborvitae R

Pleopeltis polypodioides Polypodiaceae Pteridophyta Resurrection Fern F ssp. michauxiana
Pluchea camphorata Asteraceae Magnoliopsida Camphor Marsh-fleabane F

Pluchea foetida Asteraceae Magnoliopsida Stinking Marsh-fleabane R

Pluchea odorata Asteraceae Magnoliopsida Purple Marsh-fleabane I

Poa annua Poaceae Liliopsida Annual Bluegrass I

Poa autumnalis Poaceae Liliopsida Autumn Bluegrass I

Poa chapmaniana Poaceae Liliopsida Chapman Bluegrass I

Polanisia erosa Capparaceae Magnoliopsida Large Clammyweed R ssp. erosa
Polygala incarnata Polygalaceae Magnoliopsida Pink Milkwort R

Polygala polygama Polygalaceae Magnoliopsida Bitter Milkwort I

Polygala verticillata Polygalaceae Magnoliopsida Whorled Milkwort I

Polygonum hydropiperoides Polygonaceae Magnoliopsida Swamp Smartweed C

Polygonum lapathifolium Polygonaceae Magnoliopsida Curltop Smartweed I

Polygonum pensylvanicum Polygonaceae Magnoliopsida Pennsylvania Smartweed F

Polygonum persicaria Polygonaceae Magnoliopsida Lady's Thumb I

Polygonum punctatum Polygonaceae Magnoliopsida Water Smartweed C

Polygonum ramosissimum Polygonaceae Magnoliopsida Bushy Knotweed I

Polygonum setaceum Polygonaceae Magnoliopsida Smartweed I

Polypogon monspeliensis Poaceae Liliopsida Rabbitfoot Polypogon R

Polypremum procumbens Buddlejaceae Magnoliopsida Juniperleaf F

Polytaenia nuttallii Apiaceae Magnoliopsida Prairie Parsley F

Polytaenia texana Apiaceae Magnoliopsida Texas Prairie Parsley I

Poncirus trifoliolata Rutaceae Magnoliopsida Bitter Orange R

Pontederia cordata Pontederiaceae Liliopsida Pickerelweed R var. lanceolata
Populus deltoides Salicaceae Magnoliopsida Eastern Cottonwood I

Portulaca oleracea Portulacaceae Magnoliopsida Common Purslane I

Portulaca pilosa Portulacaceae Magnoliopsida Chisme I

Portulaca umbraticola Portulacaceae Magnoliopsida Wingpod Portulaca I

Potamogeton diversifolius Potamogetonaceae Liliopsida Waterthread Pondweed I

Potamogeton diversifolius Potamogetonaceae Liliopsida Waterthread Pondweed I var. diversifolius
Prosopis glandulosa Mimosaceae Magnoliopsida Honey Mesquite C var. glandulosa
Prunella vulgaris Lamiaceae Magnoliopsida Self-heal F

Prunella vulgaris Lamiaceae Magnoliopsida Self-heal F var. hispida
Prunus angustifolia Rosaceae Magnoliopsida Chickasaw Plum I

Prunus caroliniana Rosaceae Magnoliopsida Cherry-laurel I

Prunus gracilis Rosaceae Magnoliopsida Oklahoma Plum F

Prunus mexicana Rosaceae Magnoliopsida Mexican Plum F

Prunus persica Rosaceae Magnoliopsida Peach R

Prunus serotina Rosaceae Magnoliopsida Black Cherry I var. serotina
Psoralidium tenuiflorum Fabaceae Magnoliopsida Slimleaf Scurfpea -

Pterocaulon virgatum Asteraceae Magnoliopsida Wand Blackroot I

Ptilimnium nuttallii Apiaceae Magnoliopsida Nuttall Mock Bishops Weed C

Pueraria lobata Fabaceae Magnoliopsida Kudzu R

Pyracantha coccinea Rosaceae Magnoliopsida Scarlet Firethorn I

Pyrrhopappus carolinianus Asteraceae Magnoliopsida Carolina False Dandelion F

Pyrrhopappus multicaulis Asteraceae Magnoliopsida Manystem False Dandelion I

Pyrus calleryana Rosaceae Magnoliopsida Callery Pear I

Pyrus communis Rosaceae Magnoliopsida Common Pear I