Flora of North America species comparison

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Oxytropis campestris var. wanapum
Photo is of parent taxon

field locoweed, Wanapum crazyweed, Wanapum locoweed
Habit Plants (10–)13–21 cm, herbage silky-pilose, canescent.
Leaves

(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.
Racemes

(5 or)6–12-flowered.
Peduncles

(10–)17–21(–30) cm, axis (4–)6–8(–12) cm in fruit.
Corollas

pale lavender, banner veined, keel tip maculate with purplish blue, 14–20(–23) mm.
Calyces

tube 5–7 mm, lobes (1–)2–3 mm.
Legumes

13–23 × 3.5–5 mm.

Oxytropis campestris var. wanapum
Phenology Flowering spring.
Habitat Gravelly ridges above steep north-facing basalt talus.
Elevation 600 m. (2000 ft.)
Distribution
from FNA
WA
[BONAP county map]
Discussion

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.)
Source FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Oxytropis > Oxytropis campestris
Sibling taxa
O. campestris var. chartacea, O. campestris var. columbiana, O. campestris var. cusickii, O. campestris var. davisii, O. campestris var. dispar, O. campestris var. johannensis, O. campestris var. jordalii, O. campestris var. minor, O. campestris var. roaldii, O. campestris var. spicata, O. campestris var. varians
Name authority Joyal: Great Basin Naturalist 50: 373, fig. 1. (1991)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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