Flora of North America species comparison

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Oxytropis huddelsonii

huddelson's locoweed, huddelson's oxytrope
Habit Plants pulvinate-cespitose, appearing acaulescent; caudex branches prostrate.
Leaves

1.5–5 cm, rachis obscurely purple, white-pilose;

stipules firm, stramineous or suffused with red-purple or green, glabrous or sparsely pilose, margins long-ciliate;

leaflets 7–13, blades lanceolate to elliptic or oblong, 3–6 × 1–2 mm, flat, margins involute, apex acute, surfaces sparsely pilose abaxially, pilose adaxially.
Racemes

1 or 2(or 3)-flowered.
Peduncles

1–4 cm, pubescent;

bract narrowly lanceolate, pilose.
Corollas

pink-purple, 11–15(–17) mm.
Calyces

campanulate, appressed-strigose to pilose;

tube often suffused with purple, 4–6 mm, lobes 1.2–2.2 mm.
Legumes

spreading, sessile or subsessile, ellipsoid, 10–18(–23) × 7–8 mm, unilocular, glabrous, minutely strigose, or strigulose.
2n

= 16.

Oxytropis huddelsonii
Phenology Flowering summer.
Habitat Ridge tops, frost boils, alpine tundra, heathlands, woodlands.
Elevation 500–2100 m. (1600–6900 ft.)
Distribution
from FNA
AK; BC; YT
[BONAP county map]
Discussion

Unilocular and glabrous or sparsely strigose fruits distinguish Oxytropis huddelsonii from O. nigrescens, with which it is mainly sympatric; it is without known intermediates.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Oxytropis
Sibling taxa
O. arctica, O. besseyi, O. borealis, O. campestris, O. deflexa, O. kobukensis, O. kokrinensis, O. lagopus, O. lambertii, O. maydelliana, O. mertensiana, O. multiceps, O. nana, O. nigrescens, O. oreophila, O. parryi, O. podocarpa, O. riparia, O. scammaniana, O. sericea, O. splendens
Name authority A. E. Porsild: Bull. Natl. Mus. Canada 121: 242, plate 17, fig. 5. (1951)
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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