Flora of North America species comparison

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Astragalus kentrophyta var. danaus

Astragalus kentrophyta var. douglasii
Photo is of parent taxon

Mount Dana kentrophyta, spiny milkvetch, Sweetwater Mountains. milk vetch
Photo is of parent taxon

Douglas kentrophyta, Douglas' spiny milkvetch, spiny millk-vetch, thistle milk-vetch
Habit Plants prostrate, mat- or cushion-forming, to 15 cm wide. Plants prostrate, densely mat-forming, becoming suffruticose.
Stems

and herbage strigulose, hairs basifixed.

and herbage strigulose, hairs basifixed.
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, 2–5 mm;

leaflets 5(or 7), blades 5–12 mm, surfaces pubescent.
Peduncles

0.2–0.6 cm.

subobsolete.
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.

5.8 mm;

calyx 4.7–5.2 mm, tube 2.2–2.4 mm, lobes subulate, spinulose, 2.3–3 mm;

corolla whitish.
Legumes

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

lanceoloid, 5–5.5 × 2 mm.
Seeds

5–8.

2.
2n

= 24.

= 24.

Astragalus kentrophyta var. danaus

Astragalus kentrophyta var. douglasii
Phenology Flowering Jul–Sep. Flowering Jun.
Habitat Gravelly slopes and talus upward from timberline, or in bristle-cone pine forest. Sandy substrates.
Elevation 3000–4000 m. (9800–13100 ft.) 150–400 m. (500–1300 ft.)
Distribution
from FNA
CA
[BONAP county map]
from FNA
OR; WA
[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.)

Variety douglasii is known from only a few, vague historical records, probably taken near the present city of Walla Walla near the Great Bend of the Columbia River, and appears to be extinct.

(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. elatus, A. kentrophyta var. jessiae, A. kentrophyta var. kentrophyta, A. kentrophyta var. neomexicanus, A. kentrophyta var. tegetarius, A. kentrophyta var. ungulatus
Synonyms A. tegetarius var. danaus
Name authority (Barneby) Barneby: Leafl. W. Bot. 6: 154. (1951) Barneby: Mem. New York Bot. Gard. 13: 364. (1964)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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