Astragalus lentiginosus var. toyabensis |
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toyabe milkvetch |
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Habit | Plants perennial, 10–30 cm. |
Stems | usually ascending, rarely prostrate. |
Leaves | 3–13(–16) cm; leaflets (7–)15–25, blades oval-obovate, broadly oblanceolate, or narrowly elliptic-oblanceolate, (2–)6–16(–21)mm, apex obtuse and apiculate, truncate, acute, or subacute. |
Racemes | 7–18-flowered, short and compact in fruit; axis 1–2.5(–5) cm in fruit. |
Peduncles | 1.5–4.5(–6.5) cm. |
Flowers | 12.6–17 mm; calyx (6.2–)6.7–10 mm, tube 5–6.5 mm, lobes (1.2–)1.6–3.5(–4) mm; corolla usually pink-purple, rarely whitish. |
Legumes | usually mottled becoming stramineous, narrowly to broadly ovoid-acuminate, ± strongly inflated, 8–20 × 4–11 mm, thinly papery, glabrous or exceptionally puberulent; beak triangular-acuminate, (3–)4–11 mm, unilocular. |
Seeds | 13–20. |
Astragalus lentiginosus var. toyabensis |
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Phenology | Flowering Jun–Aug. |
Habitat | Dry, stony hillsides with sagebrush, open, treeless crests within timber belt, rarely above timber belt, on cool, loamy soils among aspens, on igneous bedrock. |
Elevation | (1800–)2400–3500 m. ((5900–)7900–11500 ft.) |
Distribution |
NV |
Discussion | Usually a montane plant of central and west-central Nevada, var. toyabensis sometimes descends into the foothills as low as 1830 m, where it enters the habitat of, and apparently grades into, var. chartaceus, a form that differs typically in its leathery or at least much more stiffly papery fruit (R. C. Barneby 1964). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. |
Parent taxa | |
Sibling taxa | |
Name authority | Barneby: Leafl. W. Bot. 4: 106, plate 3, figs. 1–4. (1945) |
Web links |