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

ashen milk vetch, prescott milkvetch

Photo is of parent taxon

ashen milkvetch

Stems

0–8 cm.

1–12(–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.

4.5–10(–19) cm;

leaflets (11–)17–27(–31), blades mostly conduplicate, loosely folded, obovate-cuneate or oblanceolate, 3–16 mm, apex obtuse, emarginate, or subacute.

Racemes

10–25(–35)-flowered;

axis (1.5–)2–8(–11) cm in fruit.

(9–)11–20-flowered;

axis 2–6(–8.5) cm in fruit.

Peduncles

(4–)5–15(–21) cm.

4–14(–17) 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.

11.8–17.5 mm;

calyx (5–)6.4–8.5(–9.2) mm, tube (3.5–)4.5–6.8(–8) mm, lobes 1.2–2.2 mm;

corolla banner 11.8–17.5 mm;

keel 10.2–14.5 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.

obliquely ovoid-acuminate, 13–20 × 5–8 mm, beak 3–6 mm, thinly leathery, hardly rigid, not rugulose, densely pilosulous.

Seeds

24–35.

26–31.

Stipules

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

2–7 mm.

2n

= 22.

Astragalus tephrodes var. brachylobus

Astragalus tephrodes var. tephrodes

Phenology Flowering Apr–Jun. Flowering Apr–Jun.
Habitat Arid grasslands, oak-chaparral, in pinyon-juniper, juniper, or ponderosa pine forests, on volcanic, granitic, or sedimentary bedrock (including limestone). Oak brush, among junipers, in yucca-grasslands, edges of ponderosa pine forests, on granitic or volcanic bedrock.
Elevation 1000–2000 m. (3300–6600 ft.) 1400–2200 m. (4600–7200 ft.)
Distribution
from FNA
AZ; CA; NM; NV
[BONAP county map]
from FNA
AZ; NM; Mexico (Sonora)
[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.)

Variety tephrodes is locally plentiful in the foothills of the Mogollon and Pinos Altos mountains in southwestern New Mexico, eastward to the Organ Mountains and southward into Mexico.

(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. chloridae
Synonyms A. shortianus var. brachylobus
Name authority (A. Gray) Barneby: Amer. Midl. Naturalist 37: 466. (1947) unknown
Web links