Oxytropis lambertii
Fl. Amer. Sept. 2: 740. 1813.
Plants cespitose, appearing acaulescent, (10–)14–50 cm, herbage pilose, silky-canescent, or strigose, hairs malpighian. Leaves (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. Peduncles erect, 4–25(–35) cm, usually surpassing leaves, axis 3–16 cm in fruit, strigose; bract lanceolate to ovate-acuminate, strigose to pilose. Racemes (6–)8–45-flowered. Calyces 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. Corollas usually pink-purple, rarely white, sometimes white and purple in populations, (5–)15–25 mm, wing petals 3.5–9 mm. Legumes erect or ascending, sessile or short-stipitate, cylindric or lanceolate-acuminate (in outline), 7–25 × 2.5–6 mm, bilocular, strigose to strigulose.
Distribution
w North America.
Discussion
Varieties 3 (3 in the flora).
Selected References
None.
Lower Taxa
Key
| 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. | Oxytropis lambertii 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. | Oxytropis lambertii 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. | Oxytropis lambertii var. articulata |