Oxytropis borealis var. australis
Oxytropis borealis var. borealis
boreal locoweed
boreal locoweed
4–17 cm;
leaflets 17–27, blades thick and stiff, apex usually obtuse to rounded.
1–18 cm;
leaflets (17 or)19–27(–37), blade apex acute to obtuse or rounded.
usually 3–15-flowered, subcapitate to somewhat elongate.
5–10-flowered, subcapitate or loose.
1–15 cm, longer than or subequal to leaves, axis 4.5–5 cm in fruit, pubescent.
4–15 cm, subequal to or surpassing leaves, axis 0.5–2.5 cm in fruit, densely hirsute at least distally, hairs fuscous or mixed black and paler.
usually white or ochroleucous, keel tips maculate or not, rarely fading bluish, 15–18 mm;
wing blades not especially dilated distally.
purple, lilac, or whitish, 13–17 mm;
wing blades dilated distally to 3.5–5 mm.
5–7 mm, tube 3–4 mm, lobes 1–3 mm, prominently tuberculate.
8–10(–12) mm, tube 5–6 mm, lobes (2–)3–4(–8) mm.
erect-ascending, 12–16 × 4–6 mm.
10–18 × 5–7 mm.
= 48.
Oxytropis borealis var. australis
Oxytropis borealis var. borealis
Variety australis is restricted to Emery, Sevier, and Wayne counties, Utah, Elko and Nye counties, Nevada, and Inyo and Mono counties, California.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Variety borealis is readily identified by the combination of relatively few leaflets, many flowers, and condensed, copiously hirsute inflorescences. Specimens from the interior, such as those in Denali National Park and at Black Rapids Glacier, Alaska, have racemes somewhat elongate and wing petals particularly widened near the apex.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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