Oxytropis campestris var. chartacea
Oxytropis campestris var. davisii
field locoweed
Davis locoweed, Davis' field locoweed, Davis' oxytrope
4–26 cm;
stipules pilose, margins ciliate;
leaflets 17–29, scattered, opposite, or subopposite, blades 3–29 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.
7–12(–14)-flowered.
10–30+-flowered, elongate in fruit.
erect, (4–)8–36 cm, axis 1.5–9(–11) cm in fruit.
5–35(–38) cm, axis 2–8(–14) cm in fruit.
usually purple, rarely white, 12–18.5 mm.
usually pink-purple and fading dark purple, or bluish, sometimes polychrome, 14–19 mm.
tube 5–6 mm, lobes usually lanceolate, (1–)2–3 mm.
tube 4.2–6(–6.5) mm, lobes 1.3–3 mm.
8–15 × 4–6 mm.
10–14 × 3.5–5 mm.
= 48.
= 32.
Oxytropis campestris var. chartacea
Oxytropis campestris var. davisii
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 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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