Acmispon dendroideus |
Acmispon dendroideus var. veatchii |
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island broom |
San Miguel Island deerweed |
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Habit | Shrubs or subshrubs, erect or procumbent, low to robust, green or gray, 5–20 dm, not fleshy, sparsely to densely strigose; from woody caudices. | Subshrubs (shrubs), gray, densely strigose to almost silky. | ||||||||
Stems | 1–10+, erect or decumbent, branched, woody, leafy. |
decumbent, ± woody. |
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Leaves | irregularly pinnate; stipules glandlike; short-petiolate to petiolate; rachis 3–10 mm, not flattened; leaflets 3–5, blades narrowly obovate to elliptic or oblong, apex acute to obtuse, surfaces sparsely to densely strigose. |
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Leaflets | 3, blades usually gray, surfaces densely strigose, almost silky. |
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Inflorescences | (3–)7–12-flowered. |
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Peduncles | ascending, 2–10 mm, shorter than leaves; bract absent or unifoliolate, subtending umbel. |
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Umbels | bract unifoliolate. |
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Flowers | 8–12 mm; calyx 4–6 mm, tube sparsely strigose to glabrate, lobes short-subulate to deltate; corolla yellow, claws ± longer than calyx tube, banner implicate-ascending to 90°, wings ± equaling keel; style abruptly incurved 90°, glabrous. |
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Legumes | persistent, exserted, divergent to declined, brown, straight or curved, turgid, slightly constricted, not septate, linear-oblong, 10–50 × 1–2 mm, leathery, apex tapering, long-beaked, indehiscent, ± veined, margins thickened, smooth, glabrate or sparsely strigose. |
(20–)30–50 mm. |
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Ovules | 4–6. |
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Seeds | 1–4(–6), brown (paler veined), not mottled, cylindric, smooth. |
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Acmispon dendroideus |
Acmispon dendroideus var. veatchii |
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Phenology | Flowering (late winter–)spring(–early fall). | |||||||||
Habitat | Open, dry sites near ocean, bluffs, sandy flats, inland in canyons, brushy and rocky slopes, ridges, washes. | |||||||||
Elevation | 0–400 m. (0–1300 ft.) | |||||||||
Distribution | California
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CA |
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Discussion | Varieties 3 (3 in the flora). In a phylogeographic study of Acmispon dendroideus, L. E. Wallace et al. (2017) showed that var. traskiae is sister to vars. dendroideus and veatchii. Acmispon dendroideus has been reported from Baja California, Mexico, but the material is inadequate for confident determination. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Variety veatchii is known only from San Miguel Island, where it is uncommon. Reports of this variety from Baja California remain to be confirmed with better material. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 11. | FNA vol. 11. | ||||||||
Parent taxa | Fabaceae > subfam. Faboideae > Acmispon | Fabaceae > subfam. Faboideae > Acmispon > Acmispon dendroideus | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Synonyms | Syrmatium dendroideum, Hosackia dendroidea, Lotus dendroideus, L. scoparius var. dendroideus | Hosackia veatchii, Lotus dendroideus var. veatchii, L. scoparius var. veatchii, L. veatchii, Syrmatium patens, S. veatchii | ||||||||
Name authority | (Greene) Brouillet: J. Bot. Res. Inst. Texas 2: 389. (2008) | (Greene) Brouillet: J. Bot. Res. Inst. Texas 2: 389. (2009) | ||||||||
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