Special Collections
East Central Texas Plains
This EPA Level III ecoregion encompasses all or part of 56 Texas counties. This ecoregion separates the two bands of the Texas Blackland Prairies ecoregion and extends just across the Oklahoma border. In Texas, it covers approximately the same land area as the Texas Parks & Wildlife Department’s Post Oak Savannah vegetative region. This collection lists only those taxa found in the Texas portion of the East Central Texas Plains ecoregion.Printer Friendly: Species List | List with Images | List with QR Tags to Mobile
| scientific name | common name(s) | image gallery |
| Opuntia engelmannii var. lindheimeri | Texas Prickly Pear Lindheimer's Prickly Pear Lindheimer Prickly Pear | |
| Oplismenus hirtellus | Basketgrass | |
| Oplismenus hirtellus ssp. setarius | Basketgrass | |
| Opuntia humifusa | Low Prickly Pear Smooth Prickly Pear Devil's Tongue | |
| Opuntia macrorhiza | Bigroot Prickly Pear Twist-spine Prickly Pear Common Prickly Pear Plains Prickly Pear | |
| Opuntia macrocentra | Purple Pricklypear Purple Prickly Pear Long-spined Prickly Pear Black Spine Prickly Pear | |
| Opuntia phaeacantha | Tulip Prickly Pear Brownspine Prickly Pear Cactus Purple-fruited Prickly Pear Brown-spined Prickly Pear New Mexico Prickly Pear Desert Prickly Pear | |
| Opuntia stricta | Erect Pricklypear | |
| Ophioglossum vulgatum | Southern Adder's-tongue Adder's-tongue Adder's-tongue Fern | |
| Orobanche fasciculata | Clustered Broomrape Yellow Broomrape | |
| Orobanche ludoviciana | Louisiana Broomrape | |
| Orobanche ludoviciana ssp. multiflora | Manyflower Broomrape | |
| Orbexilum pedunculatum | Sampson's Snakeroot | |
| Orobanche uniflora | One-flowered Broomrape One-flower Cancer Root | |
| Osmunda cinnamomea | Cinnamon Fern | |
| Osmunda cinnamomea var. cinnamomea | Cinnamon Fern | |
| Osmorhiza longistylis | Longstyle Sweetroot Aniseroot Sweet-cicely Wild Licorice | |
| Osmunda regalis | Royal Fern | |
| Osmunda regalis var. spectabilis | Royal Fern | |
| Ostrya virginiana | Eastern Hop-hornbeam American Hop-hornbeam Woolly Hop-hornbean Eastern Ironwood Roughbark Ironwood Ironwood Deerwood Leverwood | |
| Oxalis albicans | Radishroot Woodsorrel | |
| Oxalis dichondrifolia | Peonyleaf Woodsorrel | |
| Oxalis dillenii | Slender Yellow Wood Sorrel Yellow Wood Sorrel Yellow Woodsorrel | |
| Oxalis drummondii | Drummond's Wood-sorrel Large-leaf Wood-sorrel Drummond's Woodsorrel | |
| Oxypolis filiformis | Water Cowbane | |
| Oxytropis lambertii | Purple Locoweed | |
| Oxalis priceae | Tufted Yellow Woodsorrel | |
| Oxypolis rigidior | Stiff Cowbane | |
| Oxalis stricta | Common Yellow Oxalis Yellow Wood-sorrel Upright Yellow Wood-sorrel Yellow Woodsorrel | |
| Oxalis violacea | Violet Woodsorrel Violet Wood-sorrel | |
| Parkinsonia aculeata | Retama Paloverde Mexican Paloverde Jerusalem Thorn Horsebean Lluvia De Oro | |
| Passiflora affinis | Bracted Passionflower Passion Flower | |
| Panicum anceps | Beaked Panicgrass Beaked Panic Grass | |
| Pappophorum bicolor | Pink Pappasgrass Pink Pappusgrass | |
| Panicum brachyanthum | Prairie Panicgrass Prairie Panic Grass | |
| Palafoxia callosa | Small Palafox Small Palafoxia | |
| Panicum capillare | Witchgrass | |
| Parthenium confertum | Gray's Feverfew | |
| Panicum dichotomiflorum | Fall Panicgrass Fall Panic Grass | |
| Paspalum dissectum | Mudbank Crowngrass | |
| Paspalum distichum | Knotgrass | |
| Panicum diffusum | Spreading Witchgrass West Indian Panicgrass West Indian Panic Grass | |
| Paronychia drummondii | Drummond's Nailwort | |
| Paspalum floridanum | Florida Paspalum | |
| Passiflora foetida | Corona De Cristo Fetid Passionflower | |
| Passiflora foetida var. gossypiifolia | Cottonleaf Passionflower Corona De Cristo | |
| Paspalidium geminatum | Egyptian Panicgrass | |
| Packera glabella | Butterweed Cress-leaf Groundsel Yellowtop | |
| Panicum hallii | Hall's Panicgrass Hall's Panic Grass | |
| Panicum hemitomon | Maidencane | |
| scientific name | common name(s) | image gallery |
