Flora of North America species comparison

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Oxytropis borealis var. borealis
Photo is of parent taxon

boreal locoweed
Habit Plants usually 4–12(–18) cm.
Leaves

1–18 cm;

leaflets (17 or)19–27(–37), blade apex acute to obtuse or rounded.
Racemes

5–10-flowered, subcapitate or loose.
Peduncles

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.
Corollas

purple, lilac, or whitish, 13–17 mm;

wing blades dilated distally to 3.5–5 mm.
Calyces

8–10(–12) mm, tube 5–6 mm, lobes (2–)3–4(–8) mm.
Legumes

10–18 × 5–7 mm.
2n

= 48.

Oxytropis borealis var. borealis
Phenology Flowering summer.
Habitat Gravel bars, ridge crests, rocky sites.
Elevation 0–1000 m. (0–3300 ft.)
Distribution
from FNA
AK; NT; YT; e Asia (Chukchi Peninsula)
[BONAP county map]
Discussion

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.)
Source FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Oxytropis > Oxytropis borealis
Sibling taxa
O. borealis var. australis, O. borealis var. hudsonica, O. borealis var. sulphurea, O. borealis var. viscida
Synonyms O. uralensis var. subsucculenta, O. viscida var. subsucculenta
Name authority unknown
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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