Leguminosae (Fabaceae)
Huisachillo is commonly considered a shrubby version of Huisache. It is found on limestone soils in the Rio Grande Plains, where it can grow into a tree of 15' to 20', and in the southern edge of the Edwards Plateau. Huisachillo tolerates more cold than the taller Huisache. Its seed pod is 21/2" to 3" long and is covered with downy hairs, while that of Huisache is glabrous, shorter, and much more woody and rounded.
Plant Habit or Use: large shrub small tree
Exposure: sun
Flower Color: yellow
Blooming Period: spring
Fruit Characteristics: brown-black twisted pod covered with downy hairs
Height: to 20 ft.
Width: to 30 ft.
Plant Character: evergreen semievergreen
Heat Tolerance: very high
Water Requirements: low
Soil Requirements: alkaline
USDA Hardiness Zone: 8
