Astragalus nuttallianus var. zapatanus
Astragalus nuttallianus var. imperfectus
loredo milkvetch, turkeypeas
imperfect milkvetch, turkey peas
2–30 cm.
2–30(–45) cm.
1.5–4.5(–5) cm;
leaflets (7 or)9–17, blades narrowly cuneate to oblong, oval, or oblong-cuneate, apex retuse or deeply emarginate.
1.5–4.5(–5.5) cm;
leaflets 7–11(or 13), blades broadly to narrowly elliptic or oval, apex acute, subacute, or round.
1–4-flowered;
axis very short in fruit.
1–4-flowered;
axis (0–)0.2–1 cm in fruit.
(0.2–)0.5–4.5 cm.
(1–)2–8(–9.5) cm.
calyx 3–4.6 mm, pilosulous, tube 1.6–2.7 mm, lobes 1.5–2.1 mm;
corolla banner (4–)4.9–6.7 mm;
keel apex triangular, slightly beaklike.
calyx 3.2–4.5 mm, strigulose or hirsutulous, tube 1.9–2.8 mm, lobes 1–1.7(–2) mm;
corolla banner 4.1–6.5(–7.3) mm;
keel apex triangular-subacute.
13–18 × 2.6–3.2 mm, loosely strigulose.
(10–)12–21 × 1.9–3.1 mm, bilocular or ± unilocular, glabrous or strigulose.
10–16.
12–16.
= 22.
Astragalus nuttallianus var. zapatanus
Astragalus nuttallianus var. imperfectus
Variety zapatanus occurs in the lower Rio Grande Valley from Laredo to the Gulf Coast and into northeastern Mexico.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Variety imperfectus was circumscribed to include forms of the species with imperfectly bilocular fruits (D. Isely 1998) but, as characterized here, fruits range from bilocular to nearly unilocular. It is somewhat distinct in northwestern Arizona, southwestern Utah, southern Nevada, and southeastern California, but merges with var. austrinus to the southeast and to the south and west it is confluent with var. cedrosensis. Recommendations have been made to merge vars. cedrosensis and imperfectus (R. C. Barneby 1964; Isely). The disjunction on Stansbury Island in Great Salt Lake might be due to transport of sheep from the Mojave Desert.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
WildflowerSearch
iNaturalist
USDA Plants Database
CA
