Astragalus kentrophyta var. ungulatus |
Astragalus kentrophyta var. neomexicanus |
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spiny milkvetch, talon kentrophyta |
New Mexican kentrophyta, New Mexico spiny milkvetch |
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Habit | Plants prostrate, mat- or cushion-forming, 8–20 cm wide. | Plants decumbent and mat- or cushion-forming, or erect and bushy-branched basally, 4–30(–40) cm. |
Stems | and herbage strigulose, hairs malpighian. |
and herbage strigulose, hairs malpighian. |
Leaves | 0.5–1.3 cm; stipules dimorphic, those at proximal nodes connate, those at distal nodes free and ± spine-tipped, 1.5–4 mm; leaflets (3 or)5, blades 3–9 mm. |
0.8–2.2 cm; stipules uniform, connate to 1/2 their length, 1–1.5(–2.5) mm; leaflets usually 5, blades 3–13 mm. |
Peduncles | 0.1–0.4 cm. |
0.1–0.3 cm. |
Flowers | 5.2–6.5 mm; calyx 3.6–4.7 mm, tube 1.8–2.1 mm, lobes subulate, spinulose, 1.8–2.6 mm; corolla whitish, keel tip purplish. |
4.8–5.2 mm; calyx 2.4–3.3 mm, tube 1.8–2.1 mm, lobes subulate, spinulose, 0.7–1.5 mm; corolla whitish. |
Legumes | obliquely lanceoloid-acuminate, 5–7.5 × 1.6–2 mm. |
obliquely ovoid, 3–4 × 1.8–2.4 mm. |
Seeds | 2 or 3(or 4). |
2 or 3. |
2n | = 24. |
= 24. |
Astragalus kentrophyta var. ungulatus |
Astragalus kentrophyta var. neomexicanus |
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Phenology | Flowering May–Jul. | Flowering Jun–Sep. |
Habitat | Calcareous gravel or gravelly clay knolls and hillsides with sagebrush. | Bluffs, badlands, dunes, mixed desert shrub and pinyon-juniper communities. |
Elevation | 1500–2200(–3000) m. (4900–7200(–9800) ft.) | 1600–2200 m. (5200–7200 ft.) |
Distribution |
CA; NV |
NM |
Discussion | Variety ungulatus contributes to the peculiar pseudo-alpine, mound- and cushion-forming vegetation on the knolls and valley floors and foothills in the high valleys of central and northeastern Nevada and Mono County, California. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Variety neomexicanus is predominantly of the northwestern quarter of New Mexico, with outlying populations along the drainage of the Pecos River in De Baca and Chaves counties. Plants from the latter area have somewhat the habit of var. kentrophyta but the pungent leaflets and short calyx lobes of var. neomexicanus. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | A. tegetarius var. neomexicanus | |
Name authority | M. E. Jones: Proc. Calif. Acad. Sci., ser. 2, 5: 650. (1895) | (Barneby) Barneby: Leafl. W. Bot. 6: 154. (1951) |
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