Oxytropis campestris var. wanapum
Oxytropis campestris var. varians
field locoweed, Wanapum crazyweed, Wanapum locoweed
field locoweed
(11–)14–18(–22) cm;
stipules pilose abaxially, margins ciliate;
leaflets (13–)19–25(–33), scattered or subopposite, blades linear to narrowly oblong, (8–)15–25(–33) mm.
3–40 cm;
stipules usually ± pilose abaxially, sometimes glabrous, margins ciliate, with clavate processes;
leaflets (9–)15–45, scattered, subopposite, or fasciculate, blades 2–24 mm.
(5 or)6–12-flowered.
(4–)10–25+-flowered.
(10–)17–21(–30) cm, axis (4–)6–8(–12) cm in fruit.
3.5–35+ cm, axis 1.5–21 cm in fruit.
pale lavender, banner veined, keel tip maculate with purplish blue, 14–20(–23) mm.
usually yellowish or whitish, rarely purplish in polychrome populations, sometimes fading purplish, keel tip sometimes maculate, usually 12–17(–19) mm.
tube 5–7 mm, lobes (1–)2–3 mm.
pilosulous, hairs black and pale, tube 4–7.5 mm, lobes (1.2–)1.5–3 mm.
13–23 × 3.5–5 mm.
12–19(–24+) × 3.5–6 mm.
= 48, 96, 98.
Oxytropis campestris var. wanapum
Oxytropis campestris var. varians
Variety wanapum is restricted to xeric, basaltic gravels, talus, or outcrops in Grant County. Its flowers, suffused with purple, are diagnostic since no other varieties of the species in the Pacific Northwest typically have colored flowers. The narrow-bladed leaflets tend to be involute and to vary in number, usually 19–25. These vegetative features are unlike any of the other several varieties of Oxytropis campestris that occur elsewhere in North America and have lavender to purplish flowers.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Variety varians is a highly variable entity, with numerous plants with differing morphological phases often growing together on the same gravel bar or hillside in portions of Alaska and Yukon. Alpine phases of the variety, especially in southeastern Alaska, northern British Columbia, and southwestern Yukon, closely simulate high altitude materials of var. cusickii at its northern limits in Alberta and southern British Columbia. Specimens of var. varians appear to intergrade with materials of var. jordalii in montane sites near Juneau. Certainly, this is the northern counterpart of var. spicata, from which it differs in characters that are altogether tenuous. Some specimens from eastern Alaska show evidence of intermediacy between var. varians and Oxytropis splendens. These form the basis of Oxytropis tananensis Jurtzev (B. A. Jurtzev 1993b), which the Pan-Arctic Flora (http://panarcticflora.org/) recognizes as a distinct species.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
WA
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
BC
