Flora of North America species comparison

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Oxytropis borealis var. viscida

Oxytropis borealis var. australis
Photo is of parent taxon

boreal locoweed, Nuttall's oxytrope, oxytrope visqueux, sticky boreal crazyweed, sticky boreal locoweed, sticky crazyweed, sticky oxytrope, sticky oxytropis, viscid locoweed
Photo is of parent taxon

boreal locoweed
Habit Plants usually 8–26+ cm, glandular. Plants usually 4–18 cm, markedly viscid.
Leaves

2–21 cm;

leaflets (19–)25–39+.

4–17 cm;

leaflets 17–27, blades thick and stiff, apex usually obtuse to rounded.
Racemes

3–19+-flowered, subcapitate to elongate.

usually 3–15-flowered, subcapitate to somewhat elongate.
Peduncles

4–27 cm, often some surpassing leaves, axis often (1.5–)4–19 cm in fruit, pubescent.

1–15 cm, longer than or subequal to leaves, axis 4.5–5 cm in fruit, pubescent.
Corollas

pink-purple, lilac, whitish, or yellowish, keel tips maculate or not, 11–16 mm;

wing blades not especially dilated distally.

usually white or ochroleucous, keel tips maculate or not, rarely fading bluish, 15–18 mm;

wing blades not especially dilated distally.
Calyces

7–10.5 mm, tube 4–7 mm, lobes (1–)1.5–3.5(–4.5) mm, prominently tuberculate.

5–7 mm, tube 3–4 mm, lobes 1–3 mm, prominently tuberculate.
Legumes

(8–)12–21(–30) × (4–)5–7 mm.

erect-ascending, 12–16 × 4–6 mm.

Oxytropis borealis var. viscida

Oxytropis borealis var. australis
Phenology Flowering spring–summer. Flowering spring–early summer.
Habitat Gravel bars, roadsides, ridge crests, talus slopes, pinyon-juniper slopes, sage­brush, boreal forest, tundra communities. Pinyon-juniper, moun­tain brush, meadow communities.
Elevation 0–3900 m. (0–12800 ft.) 2500–3500 m. (8200–11500 ft.)
Distribution
from FNA
AK; CA; CO; ID; MN; MT; NV; OR; UT; WA; WY; AB; BC; NT; NU; ON; QC; YT
[BONAP county map]
from FNA
CA; NV; UT
[BONAP county map]
Discussion

Variety viscida is quite variable, with numerous subunits held together by tenuous characteristics that are difficult to define or place in a key. Variation is often great in populations from adjacent hillsides or on a single gravel bar, especially in the Arctic. Dwarf plants far removed from the range of var. hudsonica are similar to that entity; the inflorescences become capitate, and the calyx lobes are often relatively very short. Further study might reveal the need for additional segregation. The Pan-Arctic Flora (http://panarcticflora.org/) recognizes O. glutinosa and O. viscida as distinct species.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Variety australis is restricted to Emery, Sevier, and Wayne counties, Utah, Elko and Nye counties, Nevada, and Inyo and Mono counties, California.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 11. FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Oxytropis > Oxytropis borealis Fabaceae > subfam. Faboideae > Oxytropis > Oxytropis borealis
Sibling taxa
O. borealis var. australis, O. borealis var. borealis, O. borealis var. hudsonica, O. borealis var. sulphurea
O. borealis var. borealis, O. borealis var. hudsonica, O. borealis var. sulphurea, O. borealis var. viscida
Synonyms O. viscida, Aragallus viscidus, Astragalus viscidus, O. campestris var. viscida, O. gaspensis, O. glutinosa, O. ixodes, O. leucantha var. depressa, O. leucantha var. gaspensis, O. leucantha var. ixodes, O. leucantha var. magnifica, O. leucantha var. viscida, O. sheldonensis, O. viscidula, Spiesia viscida
Name authority (Nuttall) S. L. Welsh: Great Basin Naturalist 50: 358. (1991) S. L. Welsh: Great Basin Naturalist 50: 359. (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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