Oxytropis campestris var. chartacea
Oxytropis campestris var. wanapum
field locoweed
field locoweed, Wanapum crazyweed, Wanapum locoweed
4–26 cm;
stipules pilose, margins ciliate;
leaflets 17–29, scattered, opposite, or subopposite, blades 3–29 mm.
(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.
7–12(–14)-flowered.
(5 or)6–12-flowered.
erect, (4–)8–36 cm, axis 1.5–9(–11) cm in fruit.
(10–)17–21(–30) cm, axis (4–)6–8(–12) cm in fruit.
usually purple, rarely white, 12–18.5 mm.
pale lavender, banner veined, keel tip maculate with purplish blue, 14–20(–23) mm.
tube 5–6 mm, lobes usually lanceolate, (1–)2–3 mm.
tube 5–7 mm, lobes (1–)2–3 mm.
8–15 × 4–6 mm.
13–23 × 3.5–5 mm.
= 48.
Oxytropis campestris var. chartacea
Oxytropis campestris var. wanapum
Variety chartacea is in the Center for Plant Conservation’s National Collection of Endangered Plants.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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.)
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