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hare oxytrope, haresfoot locoweed

Parry pointvetch, Parry's crazyweed, Parry's loco weed, Parry's oxytrope

Habit Plants cespitose, appearing acaulescent, herbage silky-pilose. Plants cespitose, appearing acaulescent, 2–11 cm, 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.

1.5–7 cm;

stipules membranous or papery, light tan or pale gray, white-pilose, margins ciliate;

leaflets 7–17, usually scattered, sometimes opposite, blades oblong to elliptic or lanceolate, 2–9(–12) × 0.8–3 mm, apex acute or obtuse, surfaces silky-pilose.

Racemes

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

1–3(or 4)-flowered, clustered to slightly separated.

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.

1.2–8(–10) cm, axis 0.5–1 cm in fruit, pilose;

bract lanceolate, pilose.

Corollas

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

usually pink-purple, rarely white, 7.5–12 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.

somewhat accrescent and covering 1/4 of fruit, campanulate to short-cylindric, 5–8 mm, densely white- and/or black-pilose;

tube 3–5.5 mm, lobes 1.5–2.5 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.

erect, sessile, oblong to lanceoloid-ovoid or ovoid, 13–22 × 4–8 mm, bilocular or sub-bilocular, pilosulous.

2n

= 16.

Oxytropis lagopus

Oxytropis parryi

Phenology Flowering spring–summer.
Habitat Alpine tundra, ridge tops, meadows.
Elevation 2600–3800 m. (8500–12500 ft.)
Distribution
from USDA
w North America
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; CO; ID; MT; NM; NV; UT; WY
[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. FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Oxytropis 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
O. arctica, O. besseyi, O. borealis, O. campestris, O. deflexa, O. huddelsonii, O. kobukensis, O. kokrinensis, O. lagopus, O. lambertii, O. maydelliana, O. mertensiana, O. multiceps, O. nana, O. nigrescens, O. oreophila, O. podocarpa, O. riparia, O. scammaniana, O. sericea, O. splendens
Subordinate taxa
O. lagopus var. atropurpurea, O. lagopus var. conjugans, O. lagopus var. lagopus
Synonyms Aragallus parryi, Spiesia parryi
Name authority Nuttall: J. Acad. Nat. Sci. Philadelphia 7: 17. (1834) A. Gray: Proc. Amer. Acad. Arts 20: 4. (1884)
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