Astragalus lentiginosus var. wahweapensis |
Astragalus lentiginosus var. vitreus |
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wahweap freckled milkvetch |
freckled milkvetch, glass freckled milkvetch |
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Habit | Plants perennial (short-lived, sometimes flowering first year), 10–25(–35) cm. | Plants perennial, 15–40 cm. |
Stems | diffuse and incurved-ascending. |
glabrous or glabrate. |
Leaves | (2.5–)4–11 cm; leaflets 13–23, blades elliptic-oblanceolate, broadly oblong-oblanceolate, or obovate, (3–)5–17(–20) mm, apex obtuse or emarginate. |
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 | 10–20-flowered, flowering from middle and distally, compact to loose in fruit; axis 1.5–5.5(–7) cm in fruit. |
loosely (10–)15–27-flowered, lax and open in fruit; axis 4–8.5 cm in fruit. |
Peduncles | 2.5–6(–7.5) cm. |
4–9.5 cm. |
Flowers | (12.5–)15–18.2 mm; calyx (6.2–)7.5–10.5 mm, tube (4.6–)5.2–6.7 mm, lobes 1.4–3.8 mm; corolla usually bright pink-purple with pale, striate eye, rarely white (concolorous). |
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 | green, sometimes stramineous or purple-mottled, almost always very strongly incurved, very obliquely ovoid-acuminate, moderately or greatly inflated, 15–30(–40) × (7–)9–15 mm, bilocular, thinly papery, semitranslucent, seeds visible, to almost leathery, opaque, usually glabrous, rarely puberulent; beak well-defined, triangular or deltoid, 6–15 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 | (20–)24–28. |
21–31. |
2n | = 22. |
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Astragalus lentiginosus var. wahweapensis |
Astragalus lentiginosus var. vitreus |
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Phenology | Flowering Apr–Jul. | Flowering Apr–Jun. |
Habitat | Pinyon-juniper, sagebrush, and mixed desert shrub communities. | Gullied badlands and desert flats, on sand or clay derived from sandstone or limestone, on volcanic gravel. |
Elevation | 1400–1900 m. (4600–6200 ft.) | 800–1500(–2000) m. (2600–4900(–6600) ft.) |
Distribution |
AZ; UT |
AZ; UT |
Discussion | Variety wahweapensis may be very abundant in wetter years, filling the interspaces in pinyon-juniper woodland much like an alfalfa field. It is found on the plateaus and drainages affluent to Lake Powell in eastern Kane and Garfield counties in Utah, and in northern Arizona. Variety wahweapensis grades into the slender-podded var. palans to the east and the ovoid-fruited var. diphysus southward. (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 | ||
Name authority | S. L. Welsh: Great Basin Naturalist 38: 286. (1978) | Barneby: Leafl. W. Bot. 4: 119, plate 3, figs. 30–33. (1945) |
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