Astragalus lentiginosus var. platyphyllidius |
Astragalus lentiginosus var. lentiginosus |
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broad-leaf freckled milkvetch, broad-leaf milkvetch |
freckled milk-vetch, specklepod milk-vetch |
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Habit | Plants perennial, (7–)10–30(–35) cm. | Plants perennial, 10–30(–50) cm, sparsely strigulose. |
Leaves | (4–)5–11 cm; leaflets (7–)11–17(or 19), blades usually broadly obovate-cuneate, elliptic, or suborbiculate, rarely rhombic-elliptic, (4–)7–20 mm, apex usually obtuse, retuse, truncate, or apiculate, rarely acute. |
3–10 cm; leaflets (5–)9–17(or 19), blades broadly obovate, obovate-cuneate, or oblong-elliptic to suborbiculate or oblanceolate, (3–)5–15 mm, apex retuse or obtuse. |
Racemes | shortly and loosely (5–)7–15-flowered, flowering from near or proximal to middle nodes, short and compact in fruit; axis little elongating, 1–3.5 cm in fruit. |
8–18(–22)-flowered; axis 0.5–3(–3.5) cm in fruit. |
Peduncles | 1–5 cm. |
1–3.5 cm. |
Flowers | (12.6–)14–21.4 mm; calyx (8–)8.5–12.5 mm, tube (5–)5.5–8(–9) mm, lobes 2.4–5 mm; corolla usually whitish, rarely purple. |
7.4–11 mm; calyx 4.1–6.4 mm, tube 2.8–4.2 mm, lobes 1–2.2 mm; corolla whitish or yellowish, sometimes faintly lilac. |
Legumes | variable in length, outline, and curvature, pale green or purple-speckled becoming stramineous or brownish, plumply ovoid or narrowly lanceoloid-ellipsoid, (13–)15–40(–48) × 7–14 mm, ± bilocular, strongly or slightly inflated, ± fleshy becoming leathery or stiffly papery, usually glabrous, sometimes minutely strigulose; beak deltoid or lanceolate-acuminate, 5–15 mm, unilocular. |
green, usually mottled, becoming stramineous or brownish, obliquely ovoid-acuminate to lanceoloid-acuminate, strongly to scarcely inflated, 10–23 × (3–)4.5–10 mm, semibilocular, stiffly papery, opaque or nearly so, usually thinly strigulose, rarely puberulent; beak 4–9 mm, unilocular. |
Seeds | (21–)24–32(–38). |
(15 or)16–21. |
2n | = 22. |
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Astragalus lentiginosus var. platyphyllidius |
Astragalus lentiginosus var. lentiginosus |
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Phenology | Flowering May–Jul. | Flowering May–early Jul. |
Habitat | Arid plains, hillsides, and valley floors, on basalt, with sagebrush. | Often on volcanic soils, on basalt, with sagebrush and bunchgrass, in ponderosa pine and western juniper communities. |
Elevation | 600–1900(–2100) m. (2000–6200(–6900) ft.) | 200–1500 m. (700–4900 ft.) |
Distribution |
CA; CO; ID; NV; OR; UT; WY |
CA; ID; NV; OR; WA; BC |
Discussion | Variety platyphyllidius is dispersed widely from eastern Oregon and northeastern California, across southern Idaho into western Wyoming, northeastern Nevada, and barely into northern Utah and northwestern Colorado. It is apparently common only locally, distinguished by its typically pale flowers and thick-textured fruits (approximate length of two times width or less). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Variety lentiginosus is widespread in the northern part of its range and is partially sympatric with vars. platyphyllidius and salinus in the southern part of its range. It is transitional to both. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Cystium platyphyllidium, A. lentiginosus var. cornutus, A. merrillii, C. cornutum, C. merrillii | A. lentiginosus var. carinatus |
Name authority | (Rydberg) M. Peck: Man. Pl. Oregon, 449. (1941) — (as platyphyllidium) | unknown |
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