Astragalus mollissimus var. mogollonicus |
Astragalus mollissimus var. matthewsii |
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Mogollon woolly locoweed, woolly locoweed |
Matthews woolly locoweed, woolly locoweed |
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Habit | Plants acaulescent, usually dwarf. | Plants acaulescent or subacaulescent. |
Stems | reduced to thick crowns, closely invested with stipules. |
to 1.5 cm, obscured by imbricate stipules. |
Leaves | (4–)6–16 cm; stipules 5–12 mm; leaflets (9–)13–23, blades broadly elliptic to suborbiculate, 3–13 mm. |
(3–)5–12 cm; stipules (3–)4–8 mm; leaflets 11–23, blades obovate, 3–12 mm. |
Racemes | densely 12–32-flowered; axis 1.5–6 cm in fruit. |
(5–)7–12-flowered; axis (0.5–)1–4.5 cm in fruit, not or scarcely surpassing foliage. |
Peduncles | scapiform, 4–10 cm. |
scapiform, (1.5–)2.5–8 cm. |
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. |
calyx 10–13 mm, tube 7–8.6 × 3.4–4.7 mm, lobes 2.4–5.2 mm; corolla pale purple; banner 18.5–22.5 mm; keel 14.2–18 mm. |
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. |
gently or abruptly incurved distally, broadly ovoid, turgid, 12–18 × 7–13 mm, widest near obtuse or truncate base, densely villous-tomentose; beak bilocular. |
Seeds | 19–28. |
24–31. |
Astragalus mollissimus var. mogollonicus |
Astragalus mollissimus var. matthewsii |
|
Phenology | Flowering Apr–Jul. | Flowering Apr–Jun. |
Habitat | Stony flats and hilltops, on pebbly, volcanic soils of open ponderosa pine forests, on limestone substrates, rocky knolls in pinyon-juniper belt. | Open slopes and hilltops, in ponderosa pine forests, along canyons to juniper-pinyon belt, on light, sandy or gravelly, sedimentary, granitic, or volcanic soils. |
Elevation | 1800–2300 m. (5900–7500 ft.) | 1900–2600 m. (6200–8500 ft.) |
Distribution |
AZ; NM |
AZ; NM |
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.) |
Variety matthewsii is scattered and uncommon in Apache County in eastern Arizona and from Santa Fe to McKinley counties in the mountains of north-central and northwestern New Mexico. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | A. mogollonicus, A. bigelovii var. mogollonicus | A. matthewsii, A. bigelovii var. matthewsii |
Name authority | (Greene) Barneby: Mem. New York Bot. Gard. 13: 745. (1964) | (S. Watson) Barneby: Mem. New York Bot. Gard. 13: 746. (1964) |
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