Oxytropis campestris var. wanapum
Oxytropis campestris var. jordalii
field locoweed, Wanapum crazyweed, Wanapum locoweed
jordal's field locoweed, jordal's locoweed, jordal's oxytrope
(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.
1.5–9 cm;
stipules glabrous or strigose abaxially, margins ± ciliate, apex often bristly;
leaflets 9–19, scattered or opposite, blades 1–11 mm.
(5 or)6–12-flowered.
usually 2–9-flowered, subcapitate or somewhat elongate.
(10–)17–21(–30) cm, axis (4–)6–8(–12) cm in fruit.
3–12(–14) cm, axis 1–4.5 cm in fruit.
pale lavender, banner veined, keel tip maculate with purplish blue, 14–20(–23) mm.
whitish or yellowish, sometimes polychrome, 10–14(–15) mm.
tube 5–7 mm, lobes (1–)2–3 mm.
tube (3.7–)4–5.5 mm, lobes 1–1.5 mm.
13–23 × 3.5–5 mm.
9–12 × 3.5–5 mm.
= 32.
Oxytropis campestris var. wanapum
Oxytropis campestris var. jordalii
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 jordalii is transitional to vars. roaldii and varians. Data from J. L. Jorgensen et al. (2003) give some support to O. jordalii and O. varians as distinct species.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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