Oxytropis multiceps |
Oxytropis sericea |
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flowery pointloco, Nuttall's oxytrope, Rocky Mountain oxytrope |
silky locoweed, white locoweed, whitepoint crazyweed |
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Habit | Plants pulvinate-cespitose, appearing acaulescent, herbage silky-pilose. | Plants cespitose, appearing acaulescent, 7–45 cm, herbage sparsely to densely silky-pilose, usually canescent. | ||||
Leaves | 1–5 cm; stipules membranous, light tan or pale gray, white-silky-pilose, margins ciliate; leaflets 5–9, opposite or scattered, blades lanceolate to elliptic, oblong, or oblanceolate, 3–13 × 1–4 mm, apex acute, surfaces silky-pilose. |
6–28 cm; stipules membranous, light tan or grayish, 8–22 mm, free ends acuminate, pilose, villous, glabrate, or glabrous abaxially, margins ciliate or eciliate; leaflets 7–19(or 21), opposite, subopposite, or scattered, blades ovate to elliptic, oblong, or lanceolate, (4–)7–32(–40) × (1.5–)4–9(–10) mm, apex acute, surfaces sericeous, often densely so. |
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Racemes | 1–4-flowered, clustered. |
5–20+-flowered, subcapitate to elongate. |
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Peduncles | 1–4 cm, axis 0.5–1 cm in fruit, long-villous; bract ovate to broadly lanceolate, sparsely pilose. |
erect, 7–30 cm, sericeous; bract lanceolate, shorter than flowers, pilose. |
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Corollas | bright pink to pink-purple, 17–24 mm. |
white to yellowish, keel tip maculate or not, 17–27(–28) mm. |
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Calyces | campanulate or already tumescent at anthesis, 7–13(–20) mm, densely white-pilose; tube 5.5–10 mm 8–18 mm in fruit, becoming bladdery-inflated and investing fruit, lobes 2–3 mm. |
cylindric, 7–12 mm, pilose, hairs black and white, lobes dark hairy; tube 6.5–9 mm, lobes 2–4 mm. |
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Legumes | included within swollen calyx, erect or pendulous, stipitate, stipe 0.5–1.5 mm, ovoid-ellipsoid, 6–10 × 3–5 mm, subunilocular, papery, not rigid at maturity, short-villous. |
erect, sessile, subcylindric to ovoid-oblong, 15–24 × 4.5–7 mm, ± bilocular, fleshy when fresh, becoming leathery or almost woody and rigid, strigose or pilosulous. |
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Oxytropis multiceps |
Oxytropis sericea |
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Phenology | Flowering spring–early summer. | |||||
Habitat | Gravelly summits and ridges, conifer and alpine communities. | |||||
Elevation | 1300–3200 m. (4300–10500 ft.) | |||||
Distribution |
CO; NE; UT; WY
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nw North America; c North America
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Discussion | The dwarf habit, accrescent calyces, broad bracts, and relatively few flowers are characteristic of Oxytropis multiceps. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Varieties 2 (2 in the flora). (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 | ||||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Aragallus multiceps, O. multiceps var. minor, Spiesia multiceps | |||||
Name authority | Nuttall in J. Torrey and A. Gray: Fl. N. Amer. 1: 341. (1838) | Nuttall in J. Torrey and A. Gray: Fl. N. Amer. 1: 339. (1838) | ||||
Web links |