39 



FABACEAE. 



VOL. II. 



4. Oxytropis campestris (L.) DC. Yellow or Field 

 Oxytrope. Fig. 2565. 



Astragalus campestris L. Sp. PI. 761. 1753. 



Oxytropis campestris DC. Astrag. 74. 1802. 



O. campestris coerulea Koch, Syn. 181. 1838. 



Spiesia campestris Kuntze, Rev. Gen. PI. 206. 1891. 



O. campestris johannensis Fernald, Rhodora I : 88. 1899. 



Aragallus johannensis Heller, Cat. N. A. PI. Ed. 2, 7. 1900. 



Acaulescent or nearly so, much tufted, sparingly pubes- 

 cent, or glabrate, 6'-i5' high. Stipules membranous, lanceo- 

 late, acuminate, imbricated, 3 "-4" long; leaves pinnate, 

 3'-6' long; leaflets 13-27, lanceolate or oblong, acute or 

 obtusish at the apex, rounded at the base, sessile, 3"-is" 

 long, i "-4" wide ; peduncles generally exceeding the leaves ; 

 flowers several or numerous in short spikes or heads, white, 

 yellow, rose-colored or blue, 6"-8" long ; pods sessile, papery 

 in texture, ovoid or oblong, blackish-pubescent, 6"-i2" long, 

 acuminate with the subulate style, incompletely 2-celled. 



In rocky and gravelly places, Quebec, northern Maine and 

 New Brunswick to Labrador and Hudson Strait. Also in Eu- 

 rope. Summer. Consists of several races, differing in size and 

 in color and size of the flowers. 



5. Oxytropis Lamberti Pursh. Stemless Loco- or 

 Crazy-weed. Colorado Loco Vetch. Fig. 2566. 



Oxytropis Lamberti Pursh, Fl. Am. Sept. 740. 1814. 

 Spiesia Lamberti Kuntze, Rev. Gen. PI. 207. 1891. 

 Oxytropis sericea Nutt. ; T. & G. Fl. N. A. i : 339. 1838. 



Silky-pubescent with appressed or slightly spreading hairs, 

 acaulescent or nearly so, tufted. Stipules imbricated, mem- 

 branous, pubescent, lanceolate, acute or acuminate, 4" -7" 

 long; leaves 4-9' long; leaflets 9-19, linear, oblong or some- 

 times lanceolate, acute or obtusish at the apex, mainly rounded 

 at the base, 8"-i2" long, ii"-3" wide; peduncles longer than 

 the leaves, 6'-i2' long; flowers purple, yellow, or purplish, 

 #"-15" long, in dense heads or spikes; pod incompletely 

 2-celled, coriaceous, sessile, erect, ovoid-cylindric, densely 

 pubescent, long-acuminate, 6"-i2" 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 leaf- 

 lets, color of flowers, and size of pods. April-Aug. 



6. Oxytropis splendens Dougl. 

 Fig. 2567. 



Showy Oxytrope. 



Oxytropis splendens Dougl. ; Hook. Fl. Bor. Am. i : 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, lan- 

 ceolate, acute, 4"-6" long ; leaves 4'-9*' long, erect ; leaflets 

 very numerous, in verticils of 3-6, oblong or oblong-lanceo- 

 late, acute or acutish at the apex, rounded at the base, 

 6"-io" 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"-p" long. 



Prairies and plains, Minnesota and North Dakota to Sas- 

 katchewan, Colorado and New Mexico. June-Aug. 



