WOOTON AND STANDLEY FLORA OP NEW MEXICO. 373 



24. HEDYSARUM L. 



Perennial herb with odd-piunate leaves and terminal racemes of purple flowers; 

 calyx 5-toothed, the teeth subulate; keel straight, unappendaged, longer than the 

 wings; indt a loment with 3 to 5 flat, conspicuously nerved, elliptic segments. 



1. Hedysarum pabulare A. Nels. Proc. Biol. Soc. Washington 15: 185. 1902. 



Type locality: Not stated. 



Range: Colorado and New Mexico. 



New Mexico: Canyoncito; near Fort Defiance; Raton. Open hills, in the Upper 

 Sonoran Zone. 



25. VICIA L. Wild vetch. 



Slender herbs climbing by tendrils borne at the ends of the pinnate leaves; stipules 

 semisagittate; flowers in axillary racemes or few-flowered clusters; calyx 5-toothed, 

 the upper divisions sometimes shorter; wings of the corolla adnate to the keel; stamens 

 mostly diadelphous; style filiform, hairy all around or only on the back at the apex; 

 pods flat, 2 to several-seeded, 2-valved. 



The i^lants are never very abundant, but are found almost all over the State, com- 

 monest at middle elevations in the mountains. They are all eaten by stock and con- 

 sidered good feed. Vicia cracca, the common vetch, is not infrequently cultivated 

 in various parts of the State as a fodder or soiling crop. 



KEY TO THE SPECIES. 



Flowers sessile or nearly so 7. V. angustifolia. 



Flowers long-pedicellate. 



Flowers 15 mm. long or more. 



Leaflets abundantly pubescent 8. V. caespitosa. 



Leaflets glabrous, at least in age. 



Leaflets thin, not strongly veined, usually oval, often 



linear-oblong 1 . V. americana. 



Leaflets thick, strongly veined, linear or linear- 

 oblong. 



Leaflets elongated-linear; plants low 9. V. sparsifolia. 



Leaflets, at least the upper ones, oblong to linear- 

 oblong; plants tall, climbing 10. V. dissiti/olia. 



Flowers less than 9 mm. long. 



Flowers 6 to 20 in each raceme. 



Flowers pale purple, drying blue; racemes with usu- 

 ally less than 10 flowers 2. V. pulchella. 



Flowers white; racemes 15 to 20-flowered .3. V. vielilotoides. 



Peduncles with 1 to 4 flowers. 



Peduncles 3 to 4-flowered ; flowers bright blue 4. V. leavenworthii. 



Peduncles 1 or 2-flowered; flowers pale blue or 

 whitish. 



Pods glabrous; calyx not pilose 5. V. exigiia. 



Pods pubescent; calyx pilose 6. V. leucophaea. 



1. Vicia americana Muhl.; Willd. Sp. PI. 3: 1096. 1801. 



Vicia truncata Nutt.; Torr. & Gray, Fl. N. Amer. 1: 270. 1838. 



Vicia linearis Nutt. op. cit. 276. 



Type locality: "Pennsylvania." 



Range: British America to New York and New Jersey, west to Kansas, New 

 Mexico and California. 



New Mexico: Common in a'l the higher mountains of the State. Thickets, in the 

 Transition Zone. 



