300 LEGUMINOSAE (PEA FAMILY) 



9-13, oblong or cuneate-oblong; stipules small, sheathing, subulate: peduncles 

 longer than the leaves: raceme elongated in fruit; flowers spreading and at 

 length reflexed: joints of the loment oval-orbicular, nearly glabrous, trans- 

 versely rugose-reticulated. (H. canescens Nutt.) From central Wyoming 

 northward and westward. 



2. Hedysarum marginatum Greene, Pitt. 4: 138. 1900. Stems tufted, 

 5-8 dm. high, minutely appressed-pubescent: leaflets 11-15, oblong, obtuse, 

 mucronulate, thin, pinnately veined beneath and pubescent, glabrous above: 

 raceme large and showy, elongating in fruit: corolla rose-purple, 16-20 mm. 

 long: joints of the loment 2-4, obovoid, 10-12 mm. long, at maturity with a 

 thin scarious margin, the surface strigillose and irregularly reticulate. 

 Pagosa Springs, Colorado. 



3. Hedysarum pabulare A. Nels. Proc. Biol. Soc. Wash. 15: 185. 1902. 

 Stems several, slender, decumbent, 4-7 dm. long, subcinereous: leaflets 9-15, 

 from narrowly to broadly oblong, 1-2 cm. long: racemes long, on axillary 

 peduncles surpassing the leaves; flowers lUac or pale purple, tardily or not at 

 all reflexed: calyx-tube only about 2 mm. long, its slender teeth twice as long: 

 standard 12-14 mm. long, broadly obovate, emarginate: joints of the loment 

 3-5, suborbicular, 5-7 mm. broad, pale green and nearly glabrous. H. Mac- 

 kenzii. Throughout our range. 



4. Hedysarum uintahense A. Nels. 1. c. 186. Green but obscurely pubes- 

 cent; stems stoutish, striate, erect or nearly so: leaflets 11-23, from oval to 

 lanceolate, mostly obtuse, 2-3 cm. long; stipules large, membranous: racemes 

 axillary in the uppermost approximated nodes (appearing clustered) ; flowers 

 purple or lavender, reflexed from earliest anthesis: calyx-tube about 4 mm. 

 long, its unequal teeth much shorter: keel longer than the narrow wings and 

 the standard: loment stipitate, its 2-5 joints canescent on the connective, 

 lightly reticulated, oval to oblong, 10-15 mm. ^ong. H. boreale. In the 

 mountains; from Colorado to Washington. 



5. Hedysarum sulphurescens Rydb. Bull. Torr. Bot. Club 24: 251. 1897. 

 Erect, 3-4 dm. high, minutely pubescent: stipules connate, opposite the 

 petiole; leaflets 11-13, oblong-elliptical, 1.5-2 cm. long, slightly pubescent 

 beneath: racemes 15-30-flowered, short, rather dense, elongated in fruit; 

 flowers bright yellow, 15 mm. long, the wings exceeding the standard but 

 shorter than the keel: calyx-teeth triangular-subulate, shorter than the tube: 

 pod 2-3-jointed, smooth. (H. flavescens Coult. & Fish. Bot. Gaz. 18: 300. 

 1893, name untenable.) Wyoming, Montana, and Idaho. 



6. Hedysarum philoscia A. Nels. 1. c. 185. Bright green and nearly gla- 

 brous throughout; stems slender, few-several, from thickened roots: leaflets 

 15-23, mostly oblong, 15-30 mm. long, peduncles overtopping the leaves: 

 raceme slender: calyx-tube campanulate, exceeding its triangular teeth: 

 corolla white, the wings linear: loment glabrate, the joints oval to orbicular, 

 6-8 mm. long, lightly reticulated from a somewhat large, marginal nerve. 

 Shaded stream banks; eastern Wyoming. 



Hedysarum carnosulum Greene, Pitt. 3: 212. 1897. Said to be distinguishable from 

 all other species of this country by its succulent herbage, veinless leaflets, and the close 

 transverse lineation of the loment. Canon of the Arkansas; no specimen or type cited. 



17. VICIA L. VETCH 



Herbs, mostly climbing more or less by the tendril at the end of the pinnate 

 leaves. Stipules half-sagittate. Flowers or peduncles axillary. Calyx 5-cleft 

 or 5-toothed, the 2 upper teeth often shorter, or the lowest one longer. Wings 

 of the corolla adhering to the middle of the keel. Stamens more or less dia- 

 delphous (9 and 1), the orifice of the tube oblique. Style filiform, hairy all 

 round or only on the back at the apex. Pod flat, 2-valved,-2-several-seeded. 

 Seeds globular. 



Leaves lance-ovate to broadly oval . . . . . . . 1. V. americana. 



Leaves narrowly linear to oblong. 



Peduncle not produced beyond the terminal flower . . . . 2. V. linearis. 



Peduncle produced beyond the terminal flower 3. V. producta. 



