The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links
Photo is of parent taxon

spiny leaf milk vetch, tall kentrophyta, tall spiny milkvetch

Photo is of parent taxon

spiny milkvetch, talon kentrophyta

Habit Plants usually erect or assurgent, rarely trailing, suffruticose and often bushy-branched basally, forming low, prickly bushes, 10–45(–65) cm, sometimes mat-forming. Plants prostrate, mat- or cushion-forming, 8–20 cm wide.
Stems

and herbage strigulose, hairs malpighian.

and herbage strigulose, hairs malpighian.

Leaves

(0.8–)1–2.6 cm;

stipules dimorphic, those at proximal nodes connate with bidentate tip, those at distal nodes connate near base with spiny tips, 1–12 mm;

leaflets (3 or)5 or 7, blades (2–)5–15(–17) mm, surfaces usually pubescent, sometimes glabrous adaxially.

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.

Peduncles

0.1–0.6 cm.

0.1–0.4 cm.

Flowers

4.8–6.2 mm;

calyx 3.4–4.4 mm, tube 1.8–2.3 mm, lobes subulate, spinulose, 1.5–2.4 mm;

corolla usually whitish or faintly veined or tinged purple, fading ochroleucous, rarely pink-purple.

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.

Legumes

narrowly ovoid-acuminate, (3.5–)4–7 × 1.5–2 mm.

obliquely lanceoloid-acuminate, 5–7.5 × 1.6–2 mm.

Seeds

2–4.

2 or 3(or 4).

2n

= 24.

= 24.

Astragalus kentrophyta var. elatus

Astragalus kentrophyta var. ungulatus

Phenology Flowering Jun–Sep. Flowering May–Jul.
Habitat Mixed desert and salt desert shrub, juniper-pinyon, ponderosa pine, bristlecone pine, and pine-spruce communities, floodplains. Calcareous gravel or gravelly clay knolls and hillsides with sagebrush.
Elevation 1500–2900(–3200) m. (4900–9500(–10500) ft.) 1500–2200(–3000) m. (4900–7200(–9800) ft.)
Distribution
from FNA
AZ; CA; CO; NM; NV; UT; WY
[BONAP county map]
from FNA
CA; NV
[BONAP county map]
Discussion

Both erect and prostrate phases are known, which at maturity form ascending or sprawling tangles of untidy, branched stems with prickly leaves, hence an alternative common name of barb-wire kentrophyta. The prostrate phases, typically from upper-middle elevations, simulate var. tegetarius, which has basifixed hairs.

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

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.)

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. douglasii, 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. jessiae, A. kentrophyta var. kentrophyta, A. kentrophyta var. neomexicanus, A. kentrophyta var. tegetarius
Synonyms A. impensus
Name authority S. Watson: Botany (Fortieth Parallel), 77. (1871) M. E. Jones: Proc. Calif. Acad. Sci., ser. 2, 5: 650. (1895)
Web links