1. ECOREGIONS OF TEXAS
CORNELL NOTES WITH MAP

2. ECOREGIONS MAP

3. PINEYWOODS (1)
CLIMATE – ANNUAL RAINFALL: inches. Humidity and temperature are typically high.
SOIL – Generally acidic and mostly pale to dark gray sands or sandy loams.
ELEVATION – ft. above sea level
GEOGRAPHY – Swamps and forests
VEGETATION – pine and pine-hardwood forests with cropland and pastures.

4. OAK WOODS AND PRAIRIES (2)
CLIMATE – ANNUAL RAINFALL: INCHES
SOIL – Light colored, acidic sandy loam or sands
ELEVATION – ft. above sea level
GEOGRAPHY – gently rolling to hilly
VEGETATION – Oak forest crossing strips of prairie grasslands

5. BLACKLAND PRAIRIES (3) CLIMATE – ANNUAL RAINFALL: 28-40 in. per year
SOIL – uniformly dark colored alkaline clay
ELEVATION – ft. above sea level
GEOGRAPHY – tall grass prairie
VEGETATION – tall growing grasses

6. GULF COAST PRAIRIES AND MARSHES (4)
CLIMATE – ANNUAL RAINFALL: in per year.
SOIL – acidic sands and sandy loams with clays occurring primarily in the river bottoms
ELEVATION – less than 150 ft.
GEOGRAPHY – barrier islands along the coast, salt grass marshes, prairies, and woodlands
VEGETATION – tall grass prairies and live oak woodlands. Mesquite and acacias are more common now.

7. SOUTH TEXAS PLAINS (5) CLIMATE – ANNUAL RAINFALL: 20-32 in. per year.
SOIL – Alkaline to slightly acidic clays and clay loams
ELEVATION – less than 1000 ft.
GEOGRAPHY – Plains and subtropical woodlands
VEGETATION – thorny brush like mesquite and prickly pear mixed with grasslands

8. EDWARDS PLATEAU (6) CLIMATE – ANNUAL RAINFALL: 15-34 in. per year.
SOIL – shallow
ELEVATION – ft.
GEOGRAPHY – River systems on the surface creating rough landscape
VEGETATION – grasslands, juniper/oak woodlands and plateau live or mesquite savannah.

9. LLANO UPLIFT (7) CLIMATE – ANNUAL RAINFALL: 24-32 in. per year.
SOIL – Coarse textured sands, produced from weathered granite over thousands of years.
ELEVATION – ft.
GEOGRAPHY – large granite domes
VEGETATION – oak-hickory or oak-juniper woodlands, mesquite-mixed brush savannah, and grasslands.

10. ROLLING PLAINS (8)
CLIMATE – ANNUAL RAINFALL: in. per year. Dry summers with high temperatures and high evaporation rates
SOIL – Shale and coarse sand
ELEVATION – ft.
GEOGRAPHY – rolling hills and broad flats
VEGETATION – Short grasses and mesquite savannah.

11. HIGH PLAINS (9)
CLIMATE – ANNUAL RAINFALL: in. per year. Extended droughts
SOIL – Clays and sands
ELEVATION – ft.
GEOGRAPHY – Level plateau
VEGETATION – Shortgrass prairie dominated by buffalo grass.

12. TRANS PECOS/MOUNTAINS AND BASINS (10)
CLIMATE – ANNUAL RAINFALL: Less than 12 in. per year.
SOIL – Sand and caliche
ELEVATION – ft.
GEOGRAPHY – Desert valleys and plateaus to wooded mountain tops
VEGETATION – Creosote desert shrub, desert grassland, yucca and juniper savannah, and pinon or oak forest.