Oxytropis borealis var. hudsonica
Oxytropis borealis var. borealis
Hudson bay locoweed
boreal locoweed
mostly 1.5–8 cm;
leaflets 19–33, blades 1.5–6 mm.
1–18 cm;
leaflets (17 or)19–27(–37), blade apex acute to obtuse or rounded.
densely 3–6(–16)-flowered, subcapitate to short-spicate.
5–10-flowered, subcapitate or loose.
2.5–7 cm, axis to 1 cm in fruit, sparsely villous-pilose.
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.
purplish, 11–16 mm;
wing blades not especially dilated distally.
purple, lilac, or whitish, 13–17 mm;
wing blades dilated distally to 3.5–5 mm.
7.5–8 mm, tube 6–6.5 mm, lobes 1–1.5 mm, not or obscurely verrucose.
8–10(–12) mm, tube 5–6 mm, lobes (2–)3–4(–8) mm.
8–15 × 5–7 mm.
10–18 × 5–7 mm.
= 16.
= 48.
Oxytropis borealis var. hudsonica
Oxytropis borealis var. borealis
Variety hudsonica is closely allied to, and transitional with, var. viscida, from which it differs mainly in the usually smaller size, relatively short calyx lobes, and less marked glandularity. None of these characters is definitive in all instances, either alone or in combination.
(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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