Acacia longifolia |
Acacia mearnsii |
|
---|---|---|
golden wattle, sidney golden wattle, sydney golden wattle |
black wattle |
|
Habit | Shrubs or trees, erect, to 10 m. Twigs dark reddish brown, not flexuous, ridged, glabrous. | Shrubs or small trees, erect, to 10 m. Twigs dark purplish brown to black, slightly flexuous, ridged, puberulent. |
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. |
compound, 50–140 mm; petiole 5–30 mm, puberulent, gland present, below proximalmost pinna pair, 0.7–1.5 mm diam., puberulent; rachis glands scattered, with some between pinna pairs (at pinna pair nodes and internodes); pinnae 7–31 pairs, 15–70 mm, 3–7 mm between pinna pairs; leaflets 20–70 pairs per pinna, blades linear, 1.5–3.5 × 0.5–0.8 mm, base cuneate, apex obtuse, not apiculate, surfaces puberulent. |
Inflorescences | cylindrical spikes, densely flowered, 20–50 × 5–8 mm, solitary or in fascicles of 2 or 3 in leaf axils. |
globose heads, densely flowered, 5–9 mm diam., in axillary pseudoracemes of 20–35 heads or terminal pseudopanicles of 1–10 pseudoracemes. |
Peduncles | 0–2 mm. |
4–9 mm. |
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. |
5-merous, pale yellow to cream; calyx 0.6–1.1 mm; corolla 1.4–2 mm; filaments 3.5–4.5 mm; ovary glabrous. |
Legumes | elliptic in cross section, linear, 50–150 × 5–9 mm, somewhat constricted between seeds. |
flattened, linear, 30–140 × 4–8 mm, slightly constricted between seeds. |
Seeds | aril light yellow, folded several times into thickened, lateral, skirtlike aril covering seed apex. |
aril light yellow, obovate, 1–2 mm, forming cap on seed. |
2n | = 26. |
|
Acacia longifolia |
Acacia mearnsii |
|
Phenology | Flowering winter, spring. | Flowering spring, early summer. |
Habitat | Sandy coastal areas. | Disturbed areas. |
Elevation | 0–40 m. (0–100 ft.) | 0–400 m. (0–1300 ft.) |
Distribution |
CA; Pacific Islands (Kei Islands, New Guinea); se Australia [Introduced in North America; introduced also in s South America]
|
CA; se Australia [Introduced in North 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. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Acacia mearnsii is known from Los Angeles, Orange, Riverside, San Diego, and Santa Barbara counties. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | Fabaceae > subfam. Caesalpinioideae (Mimosoid clade) > Acacia | Fabaceae > subfam. Caesalpinioideae (Mimosoid clade) > Acacia |
Sibling taxa | ||
Synonyms | Mimosa longifolia | |
Name authority | (Andrews) Willdenow: Sp. Pl. 4: 1052. (1806) | De Wildeman: Pl. Bequaert. 3: 61. (1925) — (as mearnsi) |
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