Vachellia species

Click on the images below to see larger versions.

Scientific Name Vachellia constricta (Acacia constricta) USDA PLANTS Symbol
ACCO2
Common Name Whitethorn Acacia ITIS Taxonomic Serial No.
819938
Family Fabaceae (Pea) SEINet Reference
Click Here
Description Habitat: Desert enviromment along washes, on slopes and mesas from 2,000-6,500 ft.
Plant: Woody bush 3 to 10 feet high, reddish stems armed with pairs of whitish spines 3/8 to 1-3/16 inches long at leave nodes.
Leaves: Bi-pinnate compound leaves, 1-1/4 to 1-1/2 inches long overall with 3 to 9 pairs of pinnae, each with several to many small (~1/8-inch long or less) oblong or linear leaflets; deciduous.
Inflorescence: Fragrant, bright yellow flowers in ball-shaped heads about 3/4 inch in diameter.
Bloom Period: April to June, or later following rains in drought years.
References: "Manual of the Vascular Plants of Texas" by Correll and Johnston and SEINet.
Texas Status
Native
Scientific Name Vachellia farnesiana (Acacia farnesiana) USDA PLANTS Symbol
VAFA
Common Name Huisache, Sweet Acacia ITIS Taxonomic Serial No.
183639
Family Fabaceae (Pea) SEINet Reference
Click Here
Description Habitat: Dry or moist soils in pastures, grasslands, open woodlands, waste areas and disturbed sites.
Plant: Shrub or small rounded tree up to 15 feet tall with multiple trunks; stems with spines, short to 1-3/16 inches long, at leaf nodes becoming whitish with age.
Leaves: Bi-pinnate compound leaves, 1 to 3 inches long overall with 2 to 6 pairs of pinnae, each with 10 to 18 pairs of gray-green linear-oblong leaflets each 1/8 to 1/4 inch long; deciduous.
Inflorescence: Bright, very fragrant yellow flowers in ball-shape about 3/8-inch across, arising on peduncles 3/8 to 1-5/8 inches long from leaf axils.
Bloom Period: March and April, or later following rains in drought years.
References: "Wildflowers of the Texas Hill Country" by Marshall Enquist, "Manual of the Vascular Plants of Texas" by Correll and Johnston, and SEINet.
Texas Status
Native
Scientific Name Vachellia rigidula (Acacia rigidula) USDA PLANTS Symbol
VARI
Common Name Blackbrush Acacia ITIS Taxonomic Serial No.
819928
Family Fabaceae (Pea) SEINet Reference
Click Here
Description Habitat: Various soils and conditions; common in South and Southwest Texas.
Plant: Thicket-forming shrub or small tree 3 to 15 feet tall with multiple trunks and numerous rigid, short branches; bark whitish-grey with straight spines on most branches.
Leaves: Bi-pinnate compound leaves, usually with only one pair of pinnae up to 1 inch long, and 2 to 4 pairs of leaflets 3/8 to 5/8-inch long on each; leaflets dark green, glossy and hairless, ovate with rounded tips; semi-evergreen.
Inflorescence: Many aromatic, showy flower spikes arising from branch axils, each cylindrical spike about 3/8 to 1/2-inch wide and 2 to 6 times as long; each spike with many tiny radial flower cups, no petals, many white stamens with light-yellow anthers.
Bloom Period: February to May.
References: "Manual of the Vascular Plants of Texas" by Correll and Johnston, "Texas Wildflowers" by Campbell and Loughmiller and www.wildflower.org.
Texas Status
Native

See more Acacia here.


© Tom Lebsack 2019