Shrubs or small trees, erect, to 10 m. Twigs dark purplish brown to nearly black, not flexuous, ridged, pruinose, gla­brous or pubescent. Leaves com­pound, 10–33 mm; petiole 0–2 mm, glabrous, gland absent; pinnae 2–5 pairs, 10–28 mm, 4–9 mm between pinna pairs; leaflets 8–24 pairs per pinna, blades oblong, 3.5–7.5 × 0.8–1.3 mm, base obtuse, apex obtuse to acute, not apiculate, surfaces glabrous. Peduncles 2–6 mm. Inflo­rescences globose heads, densely flowered, 4–8 mm diam., in axillary pseudoracemes of 8–35 heads or terminal pseudopanicles of 1–15 pseudoracemes. Flowers 5-merous, bright yellow; calyx 0.4–0.9 mm; corolla 1.2–2 mm; filaments 2.5–3.5 mm; ovary gla­brous. Legumes flattened, oblong, 30–150 × 7–13 mm, sometimes slightly constricted between some seeds. Seeds: aril light yellow, obovate, 2–3 mm, forming small cap on seed. 2n = 26.

Phenology: Flowering winter, early spring.
Habitat: Disturbed areas.
Elevation: 100–500 m.

Distribution

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Introduced; Calif., se Australia.

Discussion

Acacia baileyana is known from Alameda, Contra Costa, Los Angeles, Monterey, Napa, Orange, Riverside, San Bernardino, Santa Barbara, Santa Clara, Santa Cruz, San Diego, and Ventura counties.

Selected References

None.

Lower Taxa

None.