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Photo is of parent taxon

Mount Dana kentrophyta, spiny milkvetch, Sweetwater Mountains. milk vetch

Photo is of parent taxon

jessie's kentrophyta, spiny milkvetch

Habit Plants prostrate, mat- or cushion-forming, to 15 cm wide. Plants spreading or prostrate, loosely mat-forming, 5–35 cm wide.
Stems

and herbage strigulose, hairs basifixed.

and herbage strigulose, hairs malpighian.

Leaves

0.4–1.5(–2) cm;

stipules somewhat dimorphic, 2–7 mm;

leaflets 3(–7), blades 3–7 mm.

1–1.7 cm;

stipules dimorphic, those at proximal nodes connate into short, bidentate sheath, those at distal nodes longer, connate at base only, lanceolate or lanceolate-acuminate, often without spines, 1.5–7(–8) mm;

leaflets 5, blades 4–10 mm, surfaces pubescent.

Peduncles

0.2–0.6 cm.

0.1–0.6 cm.

Flowers

4–5.6 mm;

calyx 2.4–3.2 mm, tube 1.6–1.9 mm, lobes subulate to setaceous, 0.8–1.3 mm;

corolla purple or whitish and keel purple.

5.2–6.5 mm;

calyx 3.6–5.1 mm, tube 1.6–2.5 mm, lobes subulate, spinulose, 1.9–3 mm;

corolla whitish, banner and keel tips sometimes faintly tinged pink or lilac.

Legumes

subsymmetrically lenticular, 3.5–5 × 2–2.5 mm.

lenticular or ovoid-lenticular, 3–4.5 × 1.4–2 mm.

Seeds

5–8.

2(or 3).

2n

= 24.

= 24.

Astragalus kentrophyta var. danaus

Astragalus kentrophyta var. jessiae

Phenology Flowering Jul–Sep. Flowering Jun–Aug.
Habitat Gravelly slopes and talus upward from timberline, or in bristle-cone pine forest. Bluffs, ridges, dunes, sandy sites.
Elevation 3000–4000 m. (9800–13100 ft.) 700–2400 m. (2300–7900 ft.)
Distribution
from FNA
CA
[BONAP county map]
from FNA
ID; OR; UT; WY
[BONAP county map]
Discussion

Variety danaus is restricted to high elevations in the southern Sierra Nevada.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

The distribution of var. jessiae is bicentric: southwestern Idaho and southeastern Oregon, and northeastern Utah and southwestern Wyoming.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 11. FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Astragalus > sect. Ervoidei > Astragalus kentrophyta Fabaceae > subfam. Faboideae > Astragalus > sect. Ervoidei > Astragalus kentrophyta
Sibling taxa
A. kentrophyta var. coloradoensis, A. kentrophyta var. douglasii, A. kentrophyta var. elatus, A. kentrophyta var. jessiae, A. kentrophyta var. kentrophyta, A. kentrophyta var. neomexicanus, A. kentrophyta var. tegetarius, A. kentrophyta var. ungulatus
A. kentrophyta var. coloradoensis, A. kentrophyta var. danaus, A. kentrophyta var. douglasii, A. kentrophyta var. elatus, A. kentrophyta var. kentrophyta, A. kentrophyta var. neomexicanus, A. kentrophyta var. tegetarius, A. kentrophyta var. ungulatus
Synonyms A. tegetarius var. danaus A. jessiae
Name authority (Barneby) Barneby: Leafl. W. Bot. 6: 154. (1951) (M. Peck) Barneby: Leafl. W. Bot. 6: 154. (1951)
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