One color photograph of Acacia berlandieri, (also known as guajillo), an evergreen shrub or small tree from the Pea family found on caliche ridges and in brushy pastures on sandy loam or clay.

Two color photographs of Acacia minuata, (also known as huisache), an evergreen shrub or tree from the Pea family found on poorly drained or low grounds, mostly in pastures and woods and along streams.

One color photograph of Acalypha, an annual or perennial from the Spurge family found on sandy soils.

Four color photographs of Acourtia runcinata (also known as featherleaf desertpeony), a perennial flowering plant from the Aster family found in the shaded areas of well-drained loams or caliche.

One color photograph of Alceisanthes, a perennial vine from the Four O'Clock famiy found on caliche and other soils.

Three color photographs of Allowissadula lozanii (also known as false indian mallow), a perennial flowering plant from the Mallow family found on better-drained sandy and clayey loams or caliche in pastures and woods.

Three color photographs of Aloysia macrostachya, (also known as vara dulce), a deciduous shrub from the Verbena family found on caliche or dry sand in brushy pastures.

Three color photographs of Amblyolepis setigera (also known as huisache daisy), an annual flowering plant from the Aster family found in prairies and openings of the Texas Coastal Bend.

Two color photographs of Amphiachyris (also known as broomweed), an annual flowering plant from the Aster family found in prairies, openings, and waste places and near the coast or streams of the Texas Coastal Bend.

Five color photographs of Anagallis arvensis, (also known as pimpernel), an annual flowering plant from the Primrose family found in prairies, fields, and waste places and along roads.