Flora of North America species comparison

The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

Oxytropis nigrescens var. uniflora
Photo is of parent taxon

one-flower blackish locoweed, one-flower oxytrope
Habit Plants densely cespitose or pulvinate, herbage densely silky-villous, caudex branches often becoming columnar.
Leaflets

5–11, blade surfaces densely silky-canescent.
Racemes

1- or 2-flowered.
Peduncles

0.3–2.1 cm.
Legumes

usually subsessile, sometimes short-stipitate, stipe to 2 mm, shorter than calyx tube;

body usually variously strigulose to pilose or villous, rarely glabrous, hairs black.

Oxytropis nigrescens var. uniflora
Phenology Flowering summer.
Habitat Arctic tundra, coastal shores, gravel bars, rock outcrops.
Elevation 10–1500 m. (0–4900 ft.)
Distribution
from FNA
AK; BC; NT; NU; QC; YT
[BONAP county map]
Discussion

Variety uniflora, as treated here, is a North American endemic and is of conservation concern in British Columbia; it was treated as Oxytropis arctobia by Z. Meyer (2012). Oxytropis gorodkovii Jurtzev from the Chukchi Peninsula of the Russian Far East matches it in every way. The Siberian specimens seem to represent ecological variants within var. nigrescens. The online Pan-Arctic Flora (http://panarcticflora.org/) considers the material treated here as var. uniflora to be two distinct species: O. gorodkovii and O. arctobia.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Oxytropis > Oxytropis nigrescens
Sibling taxa
O. nigrescens var. lonchopoda, O. nigrescens var. nigrescens
Synonyms O. arctica var. uniflora, Astragalus nigrescens var. arctobia, O. arctobia, O. nigrescens subsp. arctobia, O. nigrescens var. arctobia, Spiesia arctobia
Name authority (Hooker) Barneby: Proc. Calif. Acad., ser. 4, 27: 209. (1952)
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).



Type/paste one or more Latin names into the boxes above; matching taxa will show up below the box as you type. You can use the up/down arrow keys to move through the list.

(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Apiaceae, Boraginaceae, and Polemoniaceae.)

Choose a data source: Flora of North America

The species comparison tool is brought to you by:
Northwest Wildflowers