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Photo is of parent taxon

Douglas kentrophyta, Douglas' spiny milkvetch, spiny millk-vetch, thistle milk-vetch

Photo is of parent taxon

Canyonlands kentrophyta, Colorado spiny milkvetch

Habit Plants prostrate, densely mat-forming, becoming suffruticose. Plants loosely mat- or clump-forming, low, to 12 cm.
Stems

and herbage strigulose, hairs basifixed.

and herbage strigulose, hairs malpighian.

Leaves

1–1.7 cm;

stipules dimorphic, 2–5 mm;

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

0.9–2.4 cm;

stipules 1–12 mm;

leaflets (3 or)5(or 7), blades 4–15 mm, surfaces pubescent.

Peduncles

subobsolete.

0.2–0.6 cm.

Flowers

5.8 mm;

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

corolla whitish.

7.3–10 mm;

calyx 6–8.3 mm, tube 2.4–3.3 mm, lobes subulate, spinulose, 3.4–5 mm;

corolla pink-purple.

Legumes

lanceoloid, 5–5.5 × 2 mm.

subsymmetrically ellipsoid, lanceoloid- or oblong-ellipsoid, (5–)7–10 × 2.8–4 mm.

Seeds

2.

4–8.

2n

= 24.

= 24.

Astragalus kentrophyta var. douglasii

Astragalus kentrophyta var. coloradoensis

Phenology Flowering Jun. Flowering Apr–Jun.
Habitat Sandy substrates. Sandy wash bottoms, sandy pockets on sandstone rimrock, in mixed desert shrub communities.
Elevation 150–400 m. (500–1300 ft.) 900–1700 m. (3000–5600 ft.)
Distribution
from FNA
OR; WA
[BONAP county map]
from FNA
AZ; UT
[BONAP county map]
Discussion

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.)

Variety coloradoensis is known from north-central Arizona and south-central Utah.

(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. 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
A. kentrophyta var. danaus, 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
Name authority Barneby: Mem. New York Bot. Gard. 13: 364. (1964) M. E. Jones: Contr. W. Bot. 10: 63. (1902)
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