Astragalus lentiginosus var. platyphyllidius |
Astragalus lentiginosus var. vitreus |
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broad-leaf freckled milkvetch, broad-leaf milkvetch |
freckled milkvetch, glass freckled milkvetch |
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Habit | Plants perennial, (7–)10–30(–35) cm. | Plants perennial, 15–40 cm. |
Stems | glabrous or glabrate. |
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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. |
4.5–10 cm; leaflets (7–)13–19, blades obovate-cuneate or oblong-obovate, (5–)7–17(–21) mm, apex obtuse or truncate-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 (10–)15–27-flowered, lax and open in fruit; axis 4–8.5 cm in fruit. |
Peduncles | 1–5 cm. |
4–9.5 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. |
13.2–17 mm; calyx 6.5–8 mm, tube 4.6–5.7 mm, lobes (1.5–)1.7–2.3 mm; corolla pink-purple or lavender with white wing tips. |
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. |
pale green and unmottled turning pallid, usually broadly ovoid, rarely lunately lanceoloid-acuminate, usually strongly inflated, rarely less so, 15–25 × (7–)9–15 mm, papery-membranous, subtranslucent, lustrous, glabrous; beak triangular, short, unilocular. |
Seeds | (21–)24–32(–38). |
21–31. |
2n | = 22. |
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Astragalus lentiginosus var. platyphyllidius |
Astragalus lentiginosus var. vitreus |
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Phenology | Flowering May–Jul. | Flowering Apr–Jun. |
Habitat | Arid plains, hillsides, and valley floors, on basalt, with sagebrush. | Gullied badlands and desert flats, on sand or clay derived from sandstone or limestone, on volcanic gravel. |
Elevation | 600–1900(–2100) m. (2000–6200(–6900) ft.) | 800–1500(–2000) m. (2600–4900(–6600) ft.) |
Distribution |
CA; CO; ID; NV; OR; UT; WY |
AZ; UT |
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 vitreus is found in the valleys of the upper Virgin River and Kanab Creek, southward to the northern slope of the Kaibab Plateau, and Toroweap and House Rock valleys in eastern Washington and western Kane counties in Utah, and northern Mohave and northwestern Coconino counties in Arizona. (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: Leafl. W. Bot. 4: 119, plate 3, figs. 30–33. (1945) |
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