Oxytropis lambertii
Oxytropis lambertii var. bigelovii
Lambert crazyweed, Lambert's locoweed, purple locoweed, woolly locoweed
purple locoweed
pilose or silky-canescent, sometimes greenish.
(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.
(2.5–)5–17(–24) cm;
stipules silky or becoming glabrate abaxially, margins ciliate;
leaflets (3–)7–15(–19), blades ovate, elliptic, broadly lanceolate, or, rarely, linear, 7–20(–32) mm.
(6–)8–45-flowered.
8–28(–45)-flowered.
erect, 4–25(–35) cm, usually surpassing leaves, axis 3–16 cm in fruit, strigose;
bract lanceolate to ovate-acuminate, strigose to pilose.
(4–)7–25(–35) cm, axis (3–)5–16 cm in fruit.
usually pink-purple, rarely white, sometimes white and purple in populations, (5–)15–25 mm, wing petals 3.5–9 mm.
bright pink-purple or, occasionally, white and purple in populations, (5–)18–23(–25) 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.
(6.5–)8–10 mm, tube (4.5–)5–7(–7.5) mm, lobes (1.5–)2–4 mm.
erect or ascending, sessile or short-stipitate, cylindric or lanceolate-acuminate (in outline), 7–25 × 2.5–6 mm, bilocular, strigose to strigulose.
sessile or short-stipitate, 15–25 mm, ca. 2 times as long as calyx.
= 32.
Oxytropis lambertii
Oxytropis lambertii var. bigelovii
Varieties 3 (3 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Populations of var. bigelovii from the canyon lands of Utah and adjacent Arizona have malpighian hairs with a very short attachment. Furthermore, the plants tend to be relatively tall and with features of the stem, inflorescence, and leaflets attenuated. The leaflets also tend to disarticulate readily from the rachis. If only the populations from Kane County, Utah, were seen, there might be a case for taxonomic recognition of those populations. In plants northward from there, the stem, inflorescence, and leaflets are not attenuated, even though the short branch of the malpighian hair is present. There does not seem to be sufficient correlation of the morphological features, however, to warrant taxonomic recognition for the plants from Kane County that appear to be transitional.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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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