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Loughmiller, Campbell and Lynn
Acacia rigidula Benth.
Blackbrush acacia, Blackbrush, Catclaw, Chaparro prieto, Gavia
Synonyms: Acacia amentacea
USDA Symbol: ACRI
USDA Native Status: Native to U.S.
Spiny, stiff-branched, thicket-forming shrub bearing numerous spikes of yellow flowers. Chaparro-prieto or blackbrush grows 5-15 ft. Prolific spikes of pale yellow, fragrant flowers are borne on the numerous stiff, thorny branches. The bark of this shrub is whitish in color. Its semi-evergreen leaves are dark-green, glossy and pinnately compound.
This Texas native is sometimes called Catclaw, thanks to its sharp, curved thorns.
Plant CharacteristicsDuration: Perennial Habit: Tree Leaf Retention: Deciduous Leaf Arrangement: Alternate Fruit Type: Legume Flower:
Flowers in 2 inch spikes
Brown Size Class:
Bloom InformationBloom Color: White , Yellow
Bloom Time: Mar , Apr , May , Jun
TX Native Distribution:
Rio Grande Plain to Austin and Big Bend; adjacent Mex. Native Habitat:
Prairie, Plains, Meadows, Pastures, Savannahs, Chaparral & brush country, Roadsides USDA Native Status: L48(N)
Growing ConditionsWater Use: Low
Light Requirement: Part Shade
Soil Moisture: Dry
Cold Tolerant: yes
Soil Description: Sandy, Sandy Loam, Medium Loam, Clay Loam, Clay, Caliche type, Dry sand or limestone.
Conditions Comments: Slow-growing but vigorous, blackbrush acacia suckers readily. These suckers can be removed at ground level. Pruning encourages dense branching and more flowers. This plant has been used both as an ornamental and for erosion control.
BenefitUse Ornamental: Aromatic, Showy, Long-living, Erosion control, Blooms ornamental. This plant is used in rock gardens, landscapes, or xeriscapes.
Use Wildlife: Flowers are a source of honey. Nectar-bees, Nectar-butterflies, Nectar-moths, Nectar-insects, Seeds-granivorous birds, Browsed by deer.
Conspicuous Flowers: yes
Deer Resistant: Moderate
PropagationPropagation Material: Seeds
Description: Propagation is possible with untreated or treated seed.
Seed Collection: Late summer to early fall when seeds are firm, filled out, and dark brown
Seed Treatment: Soaking seeds in concentrated sulfuric acid for 30 minutes has shown to enhance germination.
Wildflower Center Seed BankLBJWC-MLE-14
Collected 2010-06-07 in Val Verde County by Lady Bird Johnson Wildflower Center
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Record Modified: 2008-10-31
Research By: TWC Staff