Four color photographs of Dalea, a perennial or annual flowering plant from the Pea family found on various soils, mostly sand.

Two color photographs of Dalea nana, a perennial flowering plant from the Pea family found on various soils in prairies and openings.

Two color photographs of Daucus pusillus (also known as rattlesnake-weed), an annual flowering plant from the Carrot family found on sandy soils in prairies, openings, and waste places.

One color photograph of Descurainia pinnata (also known as tansy mustard), an annual flowering plant from the Mustard family found on sandy soils in prairies and openings of the Texas Coastal Bend.

One color photograph of Desmanthus virgatus, a perennial flowering plant from the Pea family found in prairies, openings, and waste places on various soils.

One color photograph of Distichlis spicata, a plant from the Grass family.

Nine color photographs of Echinocactus texensis (also known as devil's head or horse crippler), a flowering plant from the Cactus family found in prairies and openings on sandy loams or hardpans of the Texas Coastal Bend.

Two color photographs of Echinocereus reichenbachii (also known as black lace cactus), a flowering plant from the Cactus family found in brush or mesquite woodland of the Texas Coastal Bend.

Two color photographs of Engelmannia pinnatifida (also known as cutleaf daisy), a perennial flowering plant from the Aster family found in prairies, openings, and waste places of the Texas Coastal Bend.

Two color photographs of Equisetum hyemale, (also known as horsetail), a perennial plant from the Horsetail family found on sandy banks of Aransas River, along Mission River in Refugio County, and along Medio Creek.