Acmispon strigosus |
Acmispon strigosus var. strigosus |
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strigose lotus |
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Habit | Herbs, annual, usually mat-forming, sometimes cespitose (ascending and bushy), green to grayish, 0.3–5 dm, not or ± fleshy, strigillose, hirsute, canescent-tomentose, or scantily pubescent; taprooted. | Herbs green in appearance, sometimes cinereous, not markedly succulent, strigillose, hairs appressed. | ||||||||
Stems | 1–20+, procumbent or decumbent to ascending, branched basally, herbaceous, slender, leafy. |
ascending or decumbent. |
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Leaves | irregularly pinnate; stipules glandlike; subsessile; rachis 3–20 mm, flattened; leaflets 4–10, blades unequal, obovate to oblanceolate to linear-oblong or oblong, apex acute to obtuse or truncate, surfaces ± densely tomentose to glabrate. |
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Leaflet | blades linear-oblong, apex acute to obtuse. |
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Inflorescences | 1–3-flowered. |
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Peduncles | ascending or reflexed, upturned, 3–25 mm, shorter to longer than leaves (often elongated in fruit); bract absent or 1–3-foliolate, usually subtending umbel. |
(0.5–)1 cm, usually elongated in fruit to 2+ cm, shorter to longer than leaves. |
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Flowers | (5–)6–10(–12) mm; calyx 3–5.5 mm, tube ± sparsely strigillose or glabrous, lobes subulate; corolla yellow (sometimes banner orangish abaxially), turning orange or reddish, claws ± equaling calyx tube, banner implicate-ascending or remaining closely implicate, wings longer than keel; style corneously thickened, marked by color, straight, puberulent or glabrous. |
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Corollas | opening. |
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Legumes | persistent, exserted, erect or divergent, brown, straight to ± curved distally, compressed, not or slightly constricted, incompletely septate, linear-oblong, 10–35 × 2–3 mm, thinly leathery, apex initially short-beaked, dehiscent, smooth, margins smooth, thin, glabrous or ± strigose. |
(10–)15–35 × 2–3 mm. |
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Seeds | 5–10, greenish to brown, ± mottled, ovoid to cuboid or globose, rugulose or granular. |
greenish to brown, cuboid (rounded-oblong in cross section), less than 1 mm, irregularly rugulose. |
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2n | = 14. |
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Acmispon strigosus |
Acmispon strigosus var. strigosus |
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Phenology | Flowering late winter–spring(–fall). | |||||||||
Habitat | Usually open, dry, sandy or gravelly soils, foothills, desert slopes, coast ranges, coastal scrub, chaparral, roadsides, disturbed areas, conspicuous after fires. | |||||||||
Elevation | 0–1500(–2500) m. (0–4900(–8200) ft.) | |||||||||
Distribution | sw United States; n Mexico |
CA; Mexico (Baja California, Sonora) |
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Discussion | Varieties 3 (3 in the flora). D. Isely (1981) discussed the variation in Acmispon strigosus (as Lotus), distinguishing three varieties, two rather distinct but with intergrading phases, and one apparently more transitional, although distinct enough to be recognized. These varieties were only noted for California in recent treatments (for example, L. Brouillet 2012, following D. Isely 1993). Nonetheless, the typical (for example, excluding intergrading phases) varieties represent recognizable morphologies that also have geographic distinction. Specimens representing intergradation seem to occur throughout the range of overlap of these varieties, sometimes rendering determination difficult. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Variety strigosus is widespread from central California south, mainly west of the deserts. D. Isely (1981) recognized phases within vars. strigosus and tomentellus, which could correspond to intermediate forms between them. (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 strigosus | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Synonyms | Hosackia strigosa, Anisolotus strigosus, Lotus strigosus, Ottleya strigosa | Anisolotus nudiflorus, A. rubellus, Hosackia nudiflora, H. rubella, Lotus nudiflorus, L. rubellus, L. strigosus var. nudiflorus | ||||||||
Name authority | (Nuttall) Brouillet: J. Bot. Res. Inst. Texas 2: 392. (2008) | unknown | ||||||||
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