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Photo is of parent taxon

ashen milk vetch, prescott milkvetch

Photo is of parent taxon

ashen milkvetch, chloride milkvetch

Stems

0–8 cm.

2–15 cm.

Leaves

4–16 cm;

leaflets 11–27(–31), blades mostly flat, usually obovate-cuneate, oblanceolate, or rhombic-elliptic, rarely suborbiculate, (3–)4–17 mm, apex obtuse, acute, or emarginate.

10–24 cm;

leaflets 19–25, blades flat, rhombic, rhombic-ovate, obovate, or oblanceolate, 6–26 mm, apex usually acute, sometimes obtuse.

Racemes

10–25(–35)-flowered;

axis (1.5–)2–8(–11) cm in fruit.

13–24-flowered;

axis (4–)7–20 cm in fruit.

Peduncles

(4–)5–15(–21) cm.

13–40 cm.

Flowers

(14–)18–24 mm;

calyx 8.8–12.7(–14) mm, pilosulous to loosely strigulose, sometimes villous, tube 7.1–10 mm, lobes 1.7–2.8 mm;

corolla banner (14–)18–24 mm;

keel 14.7–20.1 mm.

16.8–20.4 mm;

calyx 11.5–14 mm, pilosulous or loosely strigulose, tube 8.3–10.2 mm, lobes 2.1–3.8 mm;

corolla banner 16.8–20.4 mm;

keel 15.2–18.2 mm.

Legumes

oblong-ellipsoid to lanceoloid-ellipsoid or, sometimes, ovoid-acuminate, 17–30 × 6–10 mm, somewhat fleshy becoming stiffly leathery or subligneous, usually strigulose or pilosulous, sometimes glabrous.

lanceolate- or oblong-ellipsoid, 22–34 × 6–10(–12) mm, beak 3–6 mm, stiffly leathery or subligneous, angles ± rugulose, strigulose-pilosulous.

Seeds

24–35.

28–36.

Stipules

2.5–11 mm, surfaces villosulous, sparsely strigulose, or glabrate abaxially.

2–15 mm, surfaces sparsely strigulose or glabrate abaxially.

2n

= 22.

Astragalus tephrodes var. brachylobus

Astragalus tephrodes var. chloridae

Phenology Flowering Apr–Jun. Flowering Mar–May.
Habitat Arid grasslands, oak-chaparral, in pinyon-juniper, juniper, or ponderosa pine forests, on volcanic, granitic, or sedimentary bedrock (including limestone). Larrea and juniper communi­ties.
Elevation 1000–2000 m. (3300–6600 ft.) 900–1400 m. (3000–4600 ft.)
Distribution
from FNA
AZ; CA; NM; NV
[BONAP county map]
from FNA
AZ; NV
[BONAP county map]
Discussion

The range of var. brachylobus extends from the crest of the Mogollon Escarpment northward to the slopes of the Kaibab Plateau, westward to the Colorado River near Needles, California, and southeastward around the edge of the Gila Basin to west-central New Mexico.

The pubescent phases of var. brachylobus were aggregated into four groups, three somewhat geographically restricted (R. C. Barneby 1964). Variety brachylobus is difficult to distinguish from var. tephrodes in west-central New Mexico.

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

As strictly perceived, var. chloridae is restricted to the Cerbat Mountains, Mohave County, Arizona, and the Newberry Mountains, Clark County, Nevada. D. Isely (1998) allowed a somewhat broader range in Mohave County.

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

Source FNA vol. 11. FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Astragalus > sect. Argophylli > Astragalus tephrodes Fabaceae > subfam. Faboideae > Astragalus > sect. Argophylli > Astragalus tephrodes
Sibling taxa
A. tephrodes var. chloridae, A. tephrodes var. tephrodes
A. tephrodes var. brachylobus, A. tephrodes var. tephrodes
Synonyms A. shortianus var. brachylobus A. remulcus var. chloridae
Name authority (A. Gray) Barneby: Amer. Midl. Naturalist 37: 466. (1947) (M. E. Jones) Barneby: Mem. New York Bot. Gard. 13: 642. (1964)
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