Oxytropis campestris var. davisii
Oxytropis campestris var. minor
Davis locoweed, Davis' field locoweed, Davis' oxytrope
field locoweed, oxytrope mineur
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.
(2–)3–10(–13) cm;
stipules glabrous or glabrate abaxially, margins eciliate;
leaflets 11–23(–27), opposite or subopposite, blades 2–10 mm.
10–30+-flowered, elongate in fruit.
(3–)5–9-flowered, subcapitate.
5–35(–38) cm, axis 2–8(–14) cm in fruit.
curved-ascending, 3–15(–18) cm, axis 0.3–1.5 cm in fruit.
usually pink-purple and fading dark purple, or bluish, sometimes polychrome, 14–19 mm.
purple fading violet, 11–18 mm.
tube 4.2–6(–6.5) mm, lobes 1.3–3 mm.
tube 5–6.5 mm, lobes deltate, 0.5–1.5(–2) mm.
10–14 × 3.5–5 mm.
10–22 × 3.5–5 mm.
= 32.
= 48.
Oxytropis campestris var. davisii
Oxytropis campestris var. minor
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.)
Putative reports of var. minor from the Mackenzie Mountains are probably referable to the purple-flowered var. roaldii, from which var. minor differs in its flowers that average larger, and in the longer calyx tube. There are several specimens from Churchill, Manitoba, that have been variously assigned to vars. johannensis, minor, or varians. Field studies of these populations need to be undertaken to resolve this problem. The Pan-Arctic Flora (http://panarcticflora.org/) treats this taxon as a distinct species, Oxytropis terrae-novae (with O. campestris var. johannensis as a synonym).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
BC
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
