Texas Level 4 Ecoregions Map
| er23a - Chihuahuan Desert Slopes |
| er23b - Madrean Lower Montane Woodlands |
| er24a - Chihuahuan Basins and Playas |
| er24b - Chihuahuan Desert Grasslands |
| er24c - Low Mountains and Bajadas |
| er24d - Chihuahuan Montane Woodlands |
| er24e - Stockton Plateau |
| er24f - Rio Grande Floodplain |
| er25b - Rolling Sand Plains |
| er25e - Rolling Cropland and Range |
| er25i - Llano Estacado |
| er25j - Shinnery Sands |
| er25k - Arid Llano Estacado |
| er26a - Cimarron Breaks |
| er26b - Flat Tablelands and Valleys |
| er26c - Caprock Canyons, Badlands, and Breaks |
| er26d - Semiarid Canadian Breaks |
| er27h - Red Prairie |
| er27i - Broken Red Plains |
| er27j - Limestone Plains | er27j - Eastern Cross Timbers |
| er29c - Western Cross Timbers | er29c - Grand Prairie |
| er29e - Limestone Cut Plain | er29e - Carbonate Cross Timbers |
| er30a - Edwards Plateau Woodland | er30a - Llano Uplift |
| er30c - Balcones Canyonlands | er30c - Semiarid Edwards Plateau |
| er31a - Northern Nueces Alluvial Plains | er31a - Semiarid Edwards Bajada |
| er31c - Texas-Tamaulipan Thornscrub | er31c - Rio Grande Floodplain and Terraces |
| er32a - Northern Blackland Prairie | er32a - Southern Blackland/Fayette Prairie |
| er32c - Floodplains and Low Terraces | er32c - Northern Post Oak Savanna |
| er33b - Southern Post Oak Savanna | er33b - San Antonio Prairie |
| er33d - Northern Prairie Outliers | er33d - Bastrop Lost Pines |
| er33f - Floodplains and Low Terraces | er33f - Northern Humid Gulf Coastal Prairies |
| er34b - Southern Subhumid Gulf Coastal Prairies | er34b - Floodplains and Low Terraces |
| er34d - Coastal Sand Plain | er34d - Lower Rio Grande Valley |
| er34f - Lower Rio Grande Alluvial Floodplain | er34f - Texas - Louisiana Coastal Marshes |
| er34h - Mid-Coast Barrier Islands and Coastal Marshes | er34h - Laguna Madre Barrier Islands and Coastal Marshes |
| er35a - Tertiary Uplands | er35a - Floodplains and Low Terraces |
| er35c - Pleistocene Fluvial Terraces | er35c - Southern Tertiary Uplands |
| er35f - Flatwoods | er35f - Red River Bottomlands |
Based on Ecoregions developed by the EPA this map describe areas of general similarity in ecosystems and in the type, quality, and quantity of environmental resources, as well as similarity of climate that can assist Texas gardenders.
