Oxytropis lagopus
Oxytropis lambertii
hare oxytrope, haresfoot locoweed
Lambert crazyweed, Lambert's locoweed, purple locoweed, woolly locoweed
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.
(2–)4–25 cm;
stipules persistent, connate opposite petiole at first, membranous becoming papery, light tan or grayish, pilose, silky, or glabrate;
leaflets (3–)7–19, blades linear-lanceolate, lanceolate, ovate to oblong, linear, linear-oblong, or elliptic, 5–40 × 2–8 mm, apex acute, surfaces canescent.
(3–)5–18-flowered, subcapitate or slightly elongate.
(6–)8–45-flowered.
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.
erect, 4–25(–35) cm, usually surpassing leaves, axis 3–16 cm in fruit, strigose;
bract lanceolate to ovate-acuminate, strigose to pilose.
bright pink-purple or bluish purple, 15–19(–20) mm.
usually pink-purple, rarely white, sometimes white and purple in populations, (5–)15–25 mm, wing petals 3.5–9 mm.
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.
cylindric, (6.5–)7–10 mm, silky-strigose or -pilose, rarely with some dark or some loose hairs;
tube purplish, (4.5–)5–8 mm, lobes 1.2–4 mm.
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 or ascending, sessile or short-stipitate, cylindric or lanceolate-acuminate (in outline), 7–25 × 2.5–6 mm, bilocular, strigose to strigulose.
Oxytropis lagopus
Oxytropis lambertii
Varieties 3 (3 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Varieties 3 (3 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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 |
1. Legumes sessile or short-stipitate; leaflets (3–)7–15(–19), blades usually ovate, elliptic, or broadly lanceolate, rarely linear; Arizona, Colorado, New Mexico, Utah, Wyoming. | var. bigelovii |
1. Legumes sessile; leaflets (5–)9–19, blades narrowly linear to linear-lanceolate or linear to narrowly oblong; Iowa, Kansas, Manitoba, Minnesota, Missouri, Montana, Nebraska, New Mexico, North Dakota, Oklahoma, Saskatchewan, South Dakota, Texas, Wyoming. | → 2 |
2. Calyx lobes 1.5–4 mm; corollas 15–20 mm; legumes 8–15 mm (2+ times as long as calyx); Iowa, Kansas, Manitoba, Minnesota, Missouri, Montana, Nebraska, North Dakota, Oklahoma, Saskatchewan, South Dakota, Wyoming. | var. lambertii |
2. Calyx lobes 1.2–3(–4) mm; corollas 18–25 mm; legumes 7–10(–17) mm (less than 2 times as long as calyx); Kansas, New Mexico, Oklahoma, Texas. | var. articulata |
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