Shrubs or small trees, erect, to 5 m. Twigs dark reddish brown, not flexuous, promin­ently ridged, glabrous or pub­escent. Leaves phyllodic; fas­cicled or whorled; phyllode quadrangular, straight, linear, acicular, 5–20 × 0.5–1.5 mm, venation parallel, midvein prominent, minor veins not obvious, apex acuminate, sharp-pointed, surfaces mostly glabrous; gland 1 (usually not obvious, disc-shaped), 3–6 mm distal to leaf base; pulvinus absent. Peduncles 2–12 mm. Inflorescences cylindrical spikes, densely flowered, 10–45 × 4–7 mm, solitary in leaf axils. Flowers 5-merous, pale yellow; calyx 0.5–0.8 mm; corolla 1.1–1.6 mm; filaments 2.2–3.2 mm; ovary glabrous. Legumes flattened, linear, 20–90 × 2.7–5 mm, not constricted between seeds. Seeds: aril light yellow, folded and thickened, forming cap on seed. 2n = 26.

Phenology: Flowering fall, winter.
Habitat: Disturbed areas.
Elevation: 0–100 m.

Distribution

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Introduced; Calif., se Australia (including Tasmania).

Discussion

Acacia verticillata is known from Marin, Monterey, San Francisco, Santa Barbara, and Santa Clara counties.

Selected References

None.

Lower Taxa

None.