Oxytropis campestris var. davisii
Oxytropis campestris var. johannensis
Davis locoweed, Davis' field locoweed, Davis' oxytrope
johann's locoweed, oxytrope du fleuve saint-jean
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.
4–26 cm;
stipules glabrous or sparsely pilose abaxially, margins ciliate;
leaflets 15–29, opposite or subopposite, blades 3–29 mm.
10–30+-flowered, elongate in fruit.
7–12(–14)-flowered.
5–35(–38) cm, axis 2–8(–14) cm in fruit.
erect, (4–)8–36 cm, axis 1.5–9(–11) cm in fruit.
usually pink-purple and fading dark purple, or bluish, sometimes polychrome, 14–19 mm.
usually purple, rarely white, 12–18.5 mm.
tube 4.2–6(–6.5) mm, lobes 1.3–3 mm.
tube 5–6 mm, lobes usually lanceolate, (1–)2–3 mm.
10–14 × 3.5–5 mm.
14–27 × 5–9 mm.
= 32.
= 48.
Oxytropis campestris var. davisii
Oxytropis campestris var. johannensis
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.)
Plants of var. johannensis from south of James Bay, Ontario, have fasciculate leaves and relatively short fruits; the latter characteristic indicates a close relationship to var. chartacea. Some specimens appear to be transitional to Oxytropis splendens. The Pan-Arctic Flora (http://panarcticflora.org/) treats var. johannensis as a synonym of O. terrae-novae.
Variety johannensis is in the Center for Plant Conservation’s National Collection of Endangered Plants.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
BC
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
