LATHYRUS. LEGUMINOS.E. 159 



cles much shorter than the leaves, 3-10-flowered ; upper teeth of the calyx 

 short, triangular, about half as long as the subulate lateral ones, petals 

 5-7 lines long, dark purple; ovary glabrous, 6-8-ovuled: pods not seen. 

 Base of Stein's Mountain, southeastern Oregon to the Wahsatch Moun- 

 tains in Utah. 



L. parvifolius Watson 1. c. xvii, 345. Glabrous throughout: stems 

 rather stout, not winged: stipules more or less broadly semisagittate; 

 leaflets 4-6 pairs, rhombic-oblong to ovate, acute, 6-12 lines long : pedun- 

 cles exceeding the leaves, loosely 6-12-flowered, calyx-teeth triangular, 

 much shorter than the tube ; corolla purple, 6-8 lines long: pods sessile, 

 linear, 2 inches long by about 3 lines broad. Eastern Washington to 

 Mexico and the Rocky Mountains. 



L. Cusickii Watson 1. c. 371. Glabrous or sparingly pubescent, slen- 

 der, from a slender perennial rootstock, 6-24 inches high; stipules nar- 

 rowly semisagittate, subulate, 4-6 lines long; leaflets 2 or 3 pairs, linear- 

 lanceolate to narrowly linear, acute or acutish and mucronate, 2-3 inches 

 long: peduncles equalling or exceeding the leaves, 2-4-flowered: corolla 

 white, 10-12 lines long; calyx 3-4 lines long, with nearly equal teeth : 

 pods attenuate to a narrow base, l^j-2 inches long by 3 lines broad : 

 hilum short. On dry mountain slopes, eastern Oregon and Washington. 



L. Xevadensis Watson 1. c. xi, 133. Slender, usually 8-10 inches high, 

 finely pubescent or nearly glabrous : stipules semisagittate, the lobes nar- 

 rowly acuminate; leaflets thin, 2-4 pairs, ovate to ovate-oblong, 1-2 inches 

 long, obtuse or acute; flowers large, 7-12 lines long, purple; calyx-teeth 

 shorter than the tube, pods linear, l>-2 inches long by 2-3 lines broad, 

 obliquely acute, attenuate at base to a short stipe. On dry wooded hill- 

 sides, AVashington to California arid Nevada. 



L. rigidus White 1. c. 455. L. albus Watson not Kittle. Glabrous 

 and somewhat glaucous : stems numerous, from a thick perennial root- 

 stock, erect, a foot or less high: stipules semisagittate, lanceolate, 6-8 

 lines long by 2-3 broad, the lower lobe small and subulate : leaflets 3-5 

 pairs, linear to oblong, acute at each end, cuspidate, 7-10 lines long: pe- 

 duncles about equalling the leaves, 2-3-flowered ; flowers white, 8-9 lines 

 long; upper teeth of the calyx deltoid, the lower one setaceous, all nearly 

 equal and shorter than the tube : pods 18-20 lines long by 4 lines broad, 

 attenuate below to a short stipe; seeds olive-yellow, 2 lines in diameter or 

 more, with very small somewhat sunken hilum. On open hillsides of the 

 Blue Mountains of Oregon. 



L. decaphyllns Pursh Fl. 471. L. polymorphus Nutt. Mostly glab- 

 rous: stems erect, a little woody at the base, much branched, short; 

 branches quadrangular : leaflets 2-5 pairs, elliptical-lanceolate or linear- 

 oblong, somewhat glaucous, rigid and very strongly veined, l-2> inches 

 long, mostly obtuse at each end; stipules lanceo^te, subfalcate, minutely 

 semisagittate at base, very variable in size, acute, sometimes almost sub- 

 ulate: peduncles a little longer than the leaves, 3-5-flowered; flowers an 

 inch long or more, very showy, purple; teeth of the calyx lanceolate-subu- 

 late, somewhat unequal, nearly as long as the tube: pods large, glabrous. 

 Grassy alluvial plains, Idaho to the Missouri river, Colorado, Arizona and 

 New Mexico. 



L. Oregonensis White 1. c. 456. Sparingly pubescent throughout: 

 stems erect, 8-16 inches high, flexuous, terete or quadrangular, wingless, 

 rigid : stipules narrowly semisagittate or semihastate, acuminate at each 

 end, entire, the lower lobe often quite short, %-/ the length of the adja- 

 cent leaf; leaflets mostly 4-7 pairs, opposite, lanceolate, obtuse, 8-20 lines 

 long, by 2-4 broad, coriaceous, sparingly pubescent on both sides: pedun- 

 cles shorter than the leaves, 3-8-flowered; flowers purple, veined, 6-8 lines 

 long; calyx- teeth subequal, the upper slightly shorter, all (shorter than 

 the dilated pubescent tube : pods compressed, abruptly terminated at the 



