Acmispon denticulatus |
Acmispon brachycarpus |
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meadow lotus, riverbar lotus |
colchita, hill lotus |
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Habit | Plants annual, glabrous or hirsute, often glaucous. | Plants annual, conspicuously villous to glabrate. |
Stems | 1–5, decumbent to erect, 0.5–4 dm. |
1–20, procumbent to low-ascending, 0.5–4 dm. |
Leaves | subpinnately, pinnately or palmately compound; leaflets 2–4, often 1 or 2 on one side of the rachis and 2 terminal, elliptic to obovate; margins entire or denticulate; tips acute to obtuse; surfaces hirsute; rachises 5–12 mm, flattened, petiolate. |
pinnately or palmately compound; leaflets 3–5, usually 2 on one side of the rachis and 2 terminal, elliptic to obovate, oblanceolate; tips usually obtuse, sometimes acute; surfaces villous to glabrate; rachises 4–10 mm, flattened, sessile or subsessile. |
Inflorescences | 1–2-flowered; bracts 0; ± sessile. |
1-flowered; ± sessile; bracts 0. |
Flowers | calyces 3–5 mm; tubes hirsute or glabrous; lobes subulate; ~1.5 × tube length; corollas 5–8 mm, cream white, or pink to pale yellow; banners purple-tinged; keel tips yellowish. |
calyces 3–6 mm; tubes villous; lobes lanceolate, 1–2 × tube length; corollas 5–9 mm, yellow; reddish-tipped, turning red. |
Fruits | dehiscent; erect or spreading; straight, widely oblong, 8–20 × 1–4 mm; tawny; tips abruptly downward angled and curved, strigose or glabrous. |
dehiscent, oblong; straight, 6–14 × 3–4 mm, brown or tawny; tips erect, obtuse, villous. |
Seeds | 2–4, gray, faintly mottled. |
2–5, tan to dark brown or blackish, faintly mottled. |
2n | =14. |
=12. |
Acmispon denticulatus |
Acmispon brachycarpus |
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Distribution | ||
Discussion | Roadsides, fields, slopes, gravel bars, meadows. Flowering May–Aug. 50–1600 m. BW, CR, ECas, Lava, Sisk, WV. CA, ID, WA; north to British Columbia, southeast to UT. Native. |
Pastures, creek banks, roadsides, hillsides, woodlands. Flowering Apr–Jul. 100–1600 m. Casc, ECas, Sisk, WV. CA, ID, NV; southeast to NM, south to Mexico. Native. |
Source | Flora of Oregon, volume 2, page 651 Richard Halse |
Flora of Oregon, volume 2, page 651 Richard Halse |
Sibling taxa | ||
Synonyms | Hosackia denticulata, Lotus denticulatus | Lotus humistratus |
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