Flora of North America species comparison

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Oxytropis lagopus

hare oxytrope, haresfoot locoweed
Habit Plants cespitose, appearing acaulescent, herbage silky-pilose.
Leaves

1–10 cm;

stipules membranous, soon ruptured, light becoming dark in age, silky-pilose, margins ciliate;

leaflets 5–17, scattered or congested, blades ovate-oblong to narrowly elliptic, 3–15 × 2–6 mm, apex acute or obtuse, surfaces pilose or sericeous.
Racemes

(3–)5–18-flowered, subcapitate or slightly elongate.
Peduncles

1–13 cm, axis 0.5–3(–4) cm in fruit, appressed-pilose to villous-hirsute;

bract ovate-lanceolate to lanceolate, margins involute, shaggy-pilose.
Corollas

bright pink-purple or bluish purple, 15–19(–20) mm.
Calyces

deeply campanulate, villous to shaggy-villous, hairs mixed blackish and white, appearing gray, 2 mm;

tube 5.5–7 mm, slightly swollen to strongly inflated, variably accrescent, ruptured by fruit or not, lobes 2–4.5 mm.
Legumes

enclosed in or exserted from calyx, erect, sessile or short-stipitate, ovoid to narrowly oblong, turgid to inflated, 6–15(–20) × 4–6.5 mm, bilocular, papery to nearly membranous, white- or black-villous.

Oxytropis lagopus
Distribution
from USDA
w North America
[WildflowerSearch map]
[BONAP county map]
Discussion

Varieties 3 (3 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Key
1. Leaflets 7 or 9(–13), congested on rachis, rachis about equaling longest leaflet; sw Alberta, w Montana.
var. conjugans
1. Leaflets 11–17, well-distributed on rachis, rachis longer than longest leaflet; Idaho, Montana, South Dakota, Wyoming.
→ 2
2. Calyces becoming swollen, accrescent in fruit; legumes falling enclosed within calyx prior to dehiscence; Idaho, Montana, n Wyoming.
var. lagopus
2. Calyces slightly swollen or not accrescent in fruit; legumes usually persisting on plant within calyx until after dehiscence; s Montana, South Dakota, Wyoming.
var. atropurpurea
Source FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Oxytropis
Sibling taxa
O. arctica, O. besseyi, O. borealis, O. campestris, O. deflexa, O. huddelsonii, O. kobukensis, O. kokrinensis, 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
Subordinate taxa
O. lagopus var. atropurpurea, O. lagopus var. conjugans, O. lagopus var. lagopus
Name authority Nuttall: J. Acad. Nat. Sci. Philadelphia 7: 17. (1834)
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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