Astragalus lentiginosus var. platyphyllidius |
Astragalus lentiginosus var. ambiguus |
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broad-leaf freckled milkvetch, broad-leaf milkvetch |
freckled milkvetch, peach springs freckled milkvetch |
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Habit | Plants perennial, (7–)10–30(–35) cm. | Plants perennial, 3–5 cm. |
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. |
7–14 cm; leaflets 13–21, blades oblanceolate or oblong-obovate, (3–)7.5–15 mm, apex retuse-emarginate. |
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. |
loosely (7–)15–20-flowered, lax and open in fruit; axis (4–)5.5–9 cm in fruit. |
Peduncles | 1–5 cm. |
7–11 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. |
(13–)15–16.7 mm; calyx 6.7–8 mm, tube 5–5.7 mm, lobes 1.6–2.3 mm; corolla purple. |
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 and unmottled becoming stramineous, plumply ovoid or subglobose, inflated but firm, 15–22 × 9–13 mm, stiffly papery or almost leathery, usually glabrous, rarely puberulent; beak 2–5 mm, unilocular. |
Seeds | (21–)24–32(–38). |
22–34. |
Astragalus lentiginosus var. platyphyllidius |
Astragalus lentiginosus var. ambiguus |
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Phenology | Flowering May–Jul. | Flowering Apr–May. |
Habitat | Arid plains, hillsides, and valley floors, on basalt, with sagebrush. | Open limestone or granite hillsides. |
Elevation | 600–1900(–2100) m. (2000–6200(–6900) ft.) | 1200–1500 m. (3900–4900 ft.) |
Distribution |
CA; CO; ID; NV; OR; UT; WY |
AZ |
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 ambiguus is known from Mohave County south of the Colorado River. (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 | |
Name authority | (Rydberg) M. Peck: Man. Pl. Oregon, 449. (1941) — (as platyphyllidium) | Barneby: Mem. New York Bot. Gard. 13: 945. (1964) |
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