Astragalus mollissimus var. mogollonicus |
Astragalus sect. Mollissimi |
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Mogollon woolly locoweed, woolly locoweed |
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Habit | Plants acaulescent, usually dwarf. | Herbs perennial, tuft- or clump-forming, acaulescent or caulescent; caudex superficial. |
Stems | reduced to thick crowns, closely invested with stipules. |
obsolete, single, or few to several. |
Leaves | (4–)6–16 cm; stipules 5–12 mm; leaflets (9–)13–23, blades broadly elliptic to suborbiculate, 3–13 mm. |
odd-pinnate, petiolate; leaflets (9 or)11–35. |
Racemes | densely 12–32-flowered; axis 1.5–6 cm in fruit. |
initially densely flowered, flowers spreading or ascending. |
Peduncles | scapiform, 4–10 cm. |
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Flowers | calyx 10–15.3 mm, tube 6.6–8.5 × 3.2–5 mm, lobes 3.3–6.8 mm; corolla pink-purple; banner 16–21.5 mm; keel 12.5–14.5 mm. |
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Corollas | purple, pinkish, pink-purple, yellowish suffused with lilac, or ochroleucous, banner recurved through 30°, keel apex round or triangular. |
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Calyx | tubes cylindric or deeply campanulate. |
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Legumes | ± straight to gently incurved, narrowly ovoid or lunately ellipsoid, 9–13 × 4.5–6 mm, densely villous-tomentose, hairs to 1.6–2.6 mm; beak bilocular. |
deciduous, sessile, spreading or ascending, (usually humistrate), obliquely ovoid, lanceoloid-ellipsoid, or linear-oblong, straight or incurved, terete to obcompressed, bilocular. |
Seeds | 19–28. |
12–38[–41]. |
Pubescence | copious and commonly villous-tomentose, with shorter, usually curly, and longer spirally twisted hairs, usually turning rusty brown on drying. |
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Hairs | basifixed. |
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Stipules | distinct. |
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Astragalus mollissimus var. mogollonicus |
Astragalus sect. Mollissimi |
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Phenology | Flowering Apr–Jul. | |
Habitat | Stony flats and hilltops, on pebbly, volcanic soils of open ponderosa pine forests, on limestone substrates, rocky knolls in pinyon-juniper belt. | |
Elevation | 1800–2300 m. (5900–7500 ft.) | |
Distribution |
AZ; NM |
c United States; sw United States; n Mexico |
Discussion | D. Isely (1998) viewed var. mogollonicus as a reduced phase of var. bigelovii, but var. mogollonicus is distinguished by its acaulescent growth habit and scapiform peduncles. It occurs from the Kaibab Plateau south of the Grand Canyon in Arizona to the southeast along the Mogollon Escarpment to western New Mexico. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Species 3 (2 in the flora). Section Mollissimi consists of three monospecific subsections: subsect. Mollissimi (A. Gray Barneby (Astragalus mollissimus); subsect. Nutriosenses S. L. Welsh (A. nutriosensis); and subsect. Orthanthi Barneby (A. helleri Fenzl). The last occurs only in Mexico. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | ||
Sibling taxa | ||
Subordinate taxa | ||
Synonyms | A. mogollonicus, A. bigelovii var. mogollonicus | |
Name authority | (Greene) Barneby: Mem. New York Bot. Gard. 13: 745. (1964) | A. Gray: Proc. Amer. Acad. Arts 6: 195. (1864) |
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