Flora of North America species comparison

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Oxytropis borealis var. sulphurea
Photo is of parent taxon

Beringian locoweed, boreal locoweed
Habit Plants usually 8–30 cm.
Leaves

4–25 cm;

leaflets 19–35, blades 4–18 mm.
Racemes

8–25-flowered, compact to loose.
Peduncles

4–20+ cm, axis often (2–)3–15 cm in fruit, pilose.
Corollas

white or bluish, keel tips maculate, 9–21 mm;

wing blades not especially dilated distally.
Calyces

6–9 mm, tube 5–7 mm, lobes 2–4 mm, prominently tuberculate.
Legumes

8–15 × 5–7 mm.

Oxytropis borealis var. sulphurea
Phenology Flowering summer.
Habitat Roadsides, gravel bars, ridge crests in boreal forests, shrublands, meadows.
Elevation 900–1300 m. (3000–4300 ft.)
Distribution
from FNA
AK; BC; YT
[BONAP county map]
Discussion

There are many transitional forms between vars. sulphurea and viscida in the broad sense. The materials included here are plottable in the herbarium and notable in the field. Many of the plants are small-flowered (ca. 12 mm) and, consequently, have narrow racemes. Large-flowered phases are present and, in some, the bracts are very long, surpassing the flowers at anthesis.

(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. borealis, O. borealis var. hudsonica, O. borealis var. viscida
Synonyms O. viscidula subsp. sulphurea
Name authority (A. E. Porsild) S. L. Welsh: Great Basin Naturalist 50: 358. (1991)
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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