Oxytropis campestris var. columbiana
Oxytropis campestris var. davisii
field locoweed, slender crazyweed
Davis locoweed, Davis' field locoweed, Davis' oxytrope
(5–)8–17 cm;
stipules usually pilose, sometimes glabrescent abaxially, margins sometimes ciliate;
leaflets 11–17(or 19), opposite or subopposite, blades 9–30 mm.
3–17(–25) cm;
stipules free ends 5–6 mm, sparsely pilose abaxially, margins ciliate, sometimes also with clavate processes;
leaflets 25–39(–45), sometimes fasciculate, blades 4–20(–29) mm.
10–28-flowered.
10–30+-flowered, elongate in fruit.
(8–)12–30 cm, axis 2–10 cm in fruit.
5–35(–38) cm, axis 2–8(–14) cm in fruit.
white, banner often veined, keel tip maculate with purplish blue, 15–20(–22) mm.
usually pink-purple and fading dark purple, or bluish, sometimes polychrome, 14–19 mm.
tube 5–6.5 mm, lobes (1.8–)2.5–4 mm.
tube 4.2–6(–6.5) mm, lobes 1.3–3 mm.
16–23 × 5–7 mm.
10–14 × 3.5–5 mm.
= 48.
= 32.
Oxytropis campestris var. columbiana
Oxytropis campestris var. davisii
Variety columbiana is distinguished by the combination of small number of leaflets, whitish flowers with maculate keels, and its soft, silky pubescence; it is very similar to var. spicata, with which it is somewhat transitional. It differs in about the same manner as other varieties in this complex group of infraspecific taxa. Most of the Washington populations appear to have been eradicated by storage water in a reservoir. This variety is known currently mainly from islands in, and points around, Flathead Lake, Lake County, Montana. The tendency toward relatively large flowers and only 11–17 leaflets is similar to the so-called cervinus phase of var. spicata, which is common some distance north of Flathead Lake and extending into British Columbia.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Variety davisii is readily distinguished by the combination of its colorful flowers, fasciculate leaflets (or the tendency toward fasciculate leaflets), and elongate inflorescences. It forms apparent intermediates with Oxytropis sericea var. speciosa and at the southern portion of its range is more or less transitional to var. spicata. A relationship with var. johannensis cannot be discounted, especially with those portions of that variety with fasciculate leaflets. Specimens transitional to O. splendens make assignment of materials to one or the other difficult in particular instances.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
WA
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
BC
