| Haplopappus spinulosa |
Goldenweed |
| § Hechtia texensis |
 False Agave |
| § Hedeoma costatum |
Ribbed Hedeoma |
| § Hedyotis acerosa |
Needleleaf Bluet |
| § Helianthus annuus |
Plains Sunflower |
| § Helianthus maximiliani |
Maximilian Sunflower |
| § Helianthus petiolaris |
Prairie Sunflower |
| Hesperaloe funifera |
Giant Hesperaloe |
| § Hesperaloe parviflora |
Red/Yellow False Yucca |
| Hesperostipa comata |
Needle and Thread Grass |
| § Hesperostipa neomexicana |
New Mexican Feather Grass |
| Heteropogon contortus |
Tanglehead Grass |
| Heterotheca latifolia |
Grass-leaved Golden Aster |
| § Heterotheca villosa |
Golden Aster |
| § Hibiscus coulteri |
Desert Rosemallow |
| § Hibiscus denudatus |
Paleface Rosemallow |
| § Hibiscus denudatus Plant Data Sheet |
Paleface Rosemallow |
| Hibiscus martianus |
Heartleaf Hibiscus, Tulipan Del Monte |
| Hilaria belangeri |
Curly Mesquite |
| § Hilaria mutica |
Tobosa |
| Hoffmanseggia densa |
Indian Hog Potato |
| § Hoffmanseggia glauca |
Pig Nut |
| § Hymenoclea monogyra |
Burro Bush |
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| § Ipomoea coccinea |
Red Morning Glory |
| § Ipomoea costellata |
Crestrib Morning Glory |
| § Ipomoea leptophylla |
Bush Morning Glory |
| § Janusia gracilis |
Janusia |
| § Jatropha dioica |
Leatherstem |
| § Jefea brevifolia |
Shorthorn Zexmenia |
| § Juglans microcarpa |
Texas Walnut, Little Walnut, Nogal |
| § Juniperus deppeana |
Alligator Juniper |
| § Juniperus flaccida |
Weeping Juniper |
| § Juniperus pinchotii |
Red-berry Juniper |
| § Justica pilosella |
Tube Tongue |
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| § Kallstroemia grandiflora |
Desert Poppy |
| § Kallstroemia parviflora |
Warty Caltrop |
| § Koeberlinia spinosa |
Allthorn |
| § Krameria erecta |
Littleleaf Ratany |
| § Krameria lanceolata |
Trailing Krameria |
| § Krascheninnikovia lanata |
Winterfat |
| § Lantana urticoides |
Texas Lantana |
| § Lappula redowskii |
Western Stickseed |
| § Larrea tridentata |
Creosotebush, Gobernadora |
| § Lesquerella gordeni |
Gordon's Bladderpod |
| § Lesquerella purpurea |
Rose Bladderpod |
| § Leucaena retusa |
Goldenball Leadtree, Littleleaf Leadtree |
| § Leucelene ericoides |
Rose Heath |
| § Leucophyllum candidum |
Texas Silverleaf |
| § Leucophyllum frutescens |
Texas Ranger, Ceniza, "Green Cloud" |
| § Leucophyllum laevigatum |
Chihuahuan Sage |
| § Leucophyllum langmaniae |
"Rio Bravo" |
| § Leucophyllum minus |
Lesser Texas Silverleaf |
| § Leucophyllum pruinosum |
"Sierra Bouquet" |
| § Leucophyllum revolutum |
"Houdini" |
| § Leucophyllum zygophyllum |
"Cimmeron" |
| § Liatris punctata |
Gayfeather |
| § Linum lewisii |
Blue Flax |
| § Lippia graveolens |
Redbrush, Scented Lippia |
| § Lithospermum incisum |
Narrowleaf Stoneseed |
| § Lobelia cardinalis |
Cardinal Flower |
| § Lobelia laxiflora |
Looseflower Lobelia |
| § Lonicera albiflora |
Southwestern White Honeysuckle |
| § Lupinus havardii |
Chisos Bluebonnet |
| § Lygodesmia texana |
Skeleton Plant |
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| § Machaeranthera tanacetifolia |
Tansy Aster |
| § Macrosiphonia lanuginosa |
Plateau Rocktrumpet |
| § Malacothrix fendleri |
Fendler's Desertdandelion |
| § Malvella lepidota |
Scurfymallow |
| § Mammillaria lasiacantha |
Golf Ball Pincushion Cactus |
| § Mammillaria pottsii |
Pott's Mammillaria |
| § Maurandya antirrhiniflora |
Roving Sailor, Snapdragon Vine |
| § Maurandya wislizenii |
Baloonbush |
| § Melampodium leucanthum |
Blackfoot Daisy |
| § Menodora longiflora |
Showy Menodora |
| § Mentzelia multiflora |
Stickleaf |
| § Mimosa aculeaticarpa var. biuncifera |
Catclaw Mimosa |
| § Mimosa borealis |
Pink Mimosa |
| § Mimulus cardinalis |
Monkeyflower |
| § Mirabilis multiflora |
Desert Four O'clock |
| § Mirabilis oblongifolia |
Mountain Four O'clock |
| § Monarda citriodora |
Lemon Beebalm |
| § Monarda fistulosa var. menthifolia |
Bergamot |
| § Muhlenbergia capillaris |
"Regal Mist" |
| § Muhlenbergia emersleyi |
Bullgrass, "El Toro" |
| Muhlenbergia montana |
Mountain Muhly |
| § Muhlenbergia porteri |
Bush Muhly |
| § Muhlenbergia rigens |
Deer Grass |
| § Muhlenbergia rigida |
Purple Muhly, "Nashville" |
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