Oxytropis campestris var. davisii
Davis' field locoweed, Davis' locoweed, Davis' oxytrope
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.
10–30+-flowered, elongate in fruit.
5–35(–38) cm, axis 2–8(–14) cm in fruit.
usually pink-purple and fading dark purple, or bluish, sometimes polychrome, 14–19 mm.
tube 4.2–6(–6.5) mm, lobes 1.3–3 mm.
10–14 × 3.5–5 mm.
= 32.
Oxytropis campestris var. davisii
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.)
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