Astragalus nuttallianus var. austrinus
Astragalus nuttallianus var. trichocarpus
rio fronteras milkvetch, smallflower milkvetch, southern small flower milk vetch
hairypod milkvetch, turkeypeas
(1–)3–25(–35) cm.
10–30(–35) cm.
1–6.5 cm;
leaflets 7–11(–17), blades often narrowly elliptic, sometimes broader proximally, apex rounded.
1–6.5 cm;
leaflets 11 or 13, blades broadly elliptic, apex subacute or obtuse, rarely emarginate proximally.
(1–)2–5(–8)-flowered;
axis very short in fruit.
(1–)3–6-flowered;
axis very short in fruit.
3–10 cm.
longer or shorter than leaves.
calyx 3.7–5.4 mm, silvery-pilose, tube (1.5–)2–3 mm, lobes 1.8–2.1 mm;
corolla white or tipped pink or purple, banner (4–)5.5–7 mm;
keel apex triangular-acute or sharply deltate, usually beaklike.
calyx 4–5.4 mm, hirsutulous, tube 2–3 mm, lobes 1.8–2.1 mm;
corolla banner (4–)5–7 mm;
keel apex triangular-acute or sharply deltate, usually beaklike.
13–24 × 1.8–2.8(–3) mm, glabrous or strigulose.
13–24 × 1.8–2.8(–3) mm, hirsutulous.
14–18.
14–18.
= 24.
Astragalus nuttallianus var. austrinus
Astragalus nuttallianus var. trichocarpus
Variety austrinus occurs from southern Kansas to the southern tip of Texas and northern Mexico, and westward to Arizona and southern California, where it grades into var. imperfectus (D. Isely 1998).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Variety trichocarpus is widespread in eastern and southern Texas, but is not clearly distinguished from var. austrinus where their ranges overlap (R. C. Barneby 1964).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
CA
KS Wildflowers
WildflowerSearch
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USDA Plants Database
