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| scientific name | common name(s) | image gallery |
| Liatris mucronata | Cusp gayfeather Gayfeather Blazing star Narrow-leaf gayfeather Texas gayfeather Cusp blazing star | |
| Lindheimera texana | Texas yellowstar Texas star Lindheimer daisy Texas yellow star | |
| Lonicera albiflora | Western white honeysuckle Texas honeysuckle White honeysuckle White shrub honeysuckle White limestone honeysuckle | |
| Lobelia cardinalis | Cardinal flower | |
| Lonicera sempervirens | Coral honeysuckle Trumpet honeysuckle Woodbine | |
| Lupinus texensis | Texas bluebonnet Bluebonnet Texas lupine Buffalo clover Wolf-flower | |
| Matelea biflora | Purple Milkweed Vine Star milkvine | |
| Marshallia caespitosa | Barbara's-buttons Puffballs White Barbara’s-buttons | |
| Matelea reticulata | Green milkweed vine Net vein milkvine Netted milkvine Pearl milkweed Vine | |
| Mahonia trifoliolata | Agarita Agarito Algerita Laredo mahonia Laredo Oregon-grape Trifoliate barberry | |
| Manfreda virginica | False aloe Rattlesnake master | |
| Merremia dissecta | Alamo Vine Noyau vine Correhuela de las Doce | |
| Morella cerifera | Wax myrtle Southern bayberry Candleberry | |
| Monarda citriodora | Lemon beebalm Horsemint Purple horsemint Lemon mint Plains horsemint Lemon horsemint | |
| Monarda fistulosa | Wild bergamot Beebalm | |
| Muhlenbergia capillaris | Gulf muhly Hair-awn muhly Hairy-awn muhly Hair grass Pink muhly | |
| Muhlenbergia lindheimeri | Lindheimer's muhly Big muhly Lindheimer muhly | |
| Nassella tenuissima | Mexican Feathergrass Mexican Wiregrass Finestem needlegrass Ponytail grass Texas tussock | |
| Nolina lindheimeriana | Devil's shoestring Devil’s-shoestring Ribbon grass | |
| Nolina texana | Texas sacahuista Texas beargrass Basket grass Sacahuista Bunchgrass | |
| Oenothera speciosa | Pink evening primrose Showy evening primrose Mexican evening primrose Showy primrose Pink ladies Buttercups Pink buttercups | |
| Passiflora affinis | Bracted passionflower Passion flower | |
| Palafoxia callosa | Small palafox Small palafoxia | |
| Passiflora foetida | Corona de Cristo Scarlet-fruit passion flower Fetid passionflower | |
| Parthenocissus heptaphylla | Sevenleaf creeper Seven-leaf Creeper | |
| Passiflora incarnata | Purple passionflower Purple passion vine Maypop Apricot vine | |
| Passiflora lutea | Yellow passion vine Yellow passion-flower Yellow passionflower | |
| Packera obovata | Golden groundsel Roundleaf groundsel Roundleaf ragwort Squawweed | |
| Parthenocissus quinquefolia | Virginia creeper | |
| Passiflora tenuiloba | Bird Wing Passionflower Birdwing passionflower Slender-lobe Passionflower Spread Lobe Passionflower | |
| Panicum virgatum | Switchgrass Wand panic grass | |
| Penstemon baccharifolius | Rock penstemon Cut-Leaf Penstemon Baccharis-leaf beardtongue Beard Tongue | |
| Penstemon cobaea | Wild foxglove Prairie penstemon Foxglove penstemon False foxglove Large-flowered beardtongue Large-flowered penstemon Prairie beardtongue Cobaea penstemon | |
| Penstemon tenuis | Brazos Penstemon Gulf Coast Penstemon Sharpsepal beardtongue | |
| Penstemon triflorus | Hill Country Penstemon Scarlet Penstemon Heller's beardtongue | |
| Phytolacca americana | American pokeweed Pokeweed Pokeberry Red Ink Plant | |
| Physostegia angustifolia | False Dragon-head Narrowleaf false dragonhead | |
| Phacelia congesta | Blue curls Caterpillars Fiddleneck | |
| Phlox cuspidata | Pointed phlox | |
| Phlox drummondii | Annual phlox Phlox Drummond phlox | |
| Physostegia intermedia | Intermediate false dragonhead Marsh obedient-plant Obedient-plant Slender false dragonhead Spring obedient plant | |
| Phyla nodiflora | Texas frogfruit Turkey tangle fogfruit Frogfruit | |
| Phacelia patuliflora var. patuliflora | Sand phacelia | |
| Phlox pilosa | Downy phlox Prairie phlox Fragrant phlox | |
| Phlox roemeriana | Goldeneye phlox Golden-eye Phlox | |
| Polytaenia nuttallii | Nuttall's prairie parsley Prairie parsley Wild dill Prairie parsnip | |
| Prunus mexicana | Mexican plum Bigtree plum | |
| Ptelea trifoliata | Wafer ash Common hoptree Hop tree | |
| Ratibida columnifera | Mexican hat Prairie coneflower Upright prairie coneflower Red-spike mexican-hat Long-headed coneflower Thimbleflower | |
| Rhynchospora corniculata | Shortbristle horned beaksedge Horned Beakrush | |
| scientific name | common name(s) | image gallery |