Acacia longifolia

Shrubs or trees, erect, to 10 m. Twigs dark reddish brown, not flexuous, ridged, glabrous. Leaves phyllodic; phyllode flat, not falcate, narrowly elliptic, 50–150 × 10–25 mm, venation parallel, with 2–4 prominent veins, minor veins prominent, apex acute to obtuse, apiculate, surfaces glabrous; gland 1, 0–7 mm distal to pulvinus; pulvinus 2–5 mm. Peduncles 0–2 mm. Inflorescences cylindrical spikes, densely flowered, 20–50 × 5–8 mm, solitary or in fascicles of 2 or 3 in leaf axils. Flowers 4-merous, bright yellow; calyx 0.6–0.9 mm; corolla 1.5–2.1 mm; filaments 2.6–3.6 mm; ovary pubescent. Legumes elliptic in cross section, linear, 50–150 × 5–9 mm, somewhat constricted between seeds. Seeds: aril light yellow, folded several times into thickened, lateral, skirtlike aril covering seed apex.

Phenology: Flowering winter, spring.
Habitat: Sandy coastal areas.
Elevation: 0–40 m.

Introduced; Calif., Pacific Islands (Kei Islands, New Guinea), se Australia, introduced also in s South America.

Discussion

Acacia longifolia is known from Alameda, Contra Costa, Los Angeles, Marin, Monterey, Orange, Riverside, San Bernardino, San Diego, San Francisco, San Luis Obispo, Santa Barbara, Santa Cruz, Solano, and Ventura counties.

Selected References

None.

Lower Taxa