5. Oxytropis Lámberti Pursh. Stemless Loco- Or Crazy-Weed. Colorado Loco Vetch

Fig. 2566

Oxytropis Lamberti Pursh, Fl. Am. Sept. 740. 1814. Spiesia Lamberti Kuntze, Rev. Gen. Pl. 207. 1891. Oxytropis sericea Nutt.; T. & G. Fl. N. A. 1: 339. 1838.

Silky-pubescent with appressed or slightly spreading hairs, acaulescent or nearly so, tufted. Stipules imbricated, membranous, pubescent, lanceolate, acute or acuminate, 4"-7" long; leaves 4'-9" long; leaflets 9-19, linear, oblong or sometimes lanceolate, acute or obtusish at the apex, mainly rounded at the base, 8"-12" long, 1 1/2-3" wide; peduncles longer than the leaves, 6'-12' long; flowers purple, yellow, or purplish, 8"-15" long, in dense heads or spikes; pod incompletely 2-celled, coriaceous, sessile, erect, ovoid-cylindric, densely pubescent, long-acuminate, 6"-12" long, exceeding the calyx.

Prairies, Minnesota to North Dakota, Saskatchewan and British Columbia, south to Texas and New Mexico. Consists of several races, differing in amount of pubescence, shape and size of leaflets, color of flowers, and size of pods. April-Aug.

5 Oxytropis L Mberti Pursh Stemless Loco Or Crazy  9085 Oxytropis L Mberti Pursh Stemless Loco Or Crazy  909

6. Oxytropis Spléndens Dougl. Showy Oxytrope

Fig. 2567

Oxytropis splendens Dougl.; Hook. Fl. Bor. Am. 1: 147. 1833. Spiesia splendens Kuntze, Rev. Gen. Pl. 207. 1891. Aragallus splendens Greene, Pittonia 3: 211. 1897.

Densely silvery and silky-villous, acaulescent, tufted. Stipules imbricated, membranous, villous-pubescent, lanceolate, acute, 4"-6" long; leaves 4'-9 /2' long, erect; leaflets very numerous, in verticils of 3-6, oblong or oblong-lanceolate, acute or acutish at the apex, rounded at the base, 6"-10" long, 2"-4" wide; peduncles exceeding the leaves, sometimes 12' long; flowers deep purple, about 6" long, in dense spikes; pods ovoid, erect, 2-celled or nearly so, long-acuminate with a spreading or oblique tip, villous-pubescent, little exceeding the calyx, 6"-9" long.

Prairies and plains, Minnesota and North Dakota to Saskatchewan, Colorado and New Mexico. June-Aug.

7. Oxytropis Belli (Britton) Palibine. Bell's Oxytrope

Fig. 2568

Spiesia Belli Britton; J. M. Macoun, Can. Rec. Sci.

1894: 148. 1894. Aragallus Belli Greene, Pittonia 3: 212. 1897. 0. Belli Palibine, Bull. Soc. Bot. Geneve 2: 19. 1910.

Acaulescent, tufted, loosely villous with white hairs. Stipules membranous, ovate or oblong, acute or acuminate, imbricated, villous or glabrate, 5"-7" long; leaves 3'-6' long; leaflets oblong or oblong-lanceolate, subacute at the apex, rounded at the base, 3"-4" long, 1"-2" wide, in verticils of 3 or 4; peduncles about equalling the leaves; inflorescence capitate; pod oblong, erect-spreading, densely pubescent with black hairs or some longer whitish ones intermixed, about 9" long and 3" thick, 2-3 times as long as the black-pubescent calyx, very nearly or quite 2-celled by the intrusion of the ventral suture, the tip erect; corolla not seen.

Hudson Bay. Summer.

7 Oxytropis Belli Britton Palibine Bell s Oxytrope 910