“LATHYRUS. LEGUMINOS 2. 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 Ieng, 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 |. 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; gerctin 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 |. ec. 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, 114-2 inches long by 5 lines broad: 
hilum short. On dry mountain slopes, eastern Oregon and Washington. 
L. Nevadensis Watson |. 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, 14-2 inches long by 2-3 lines broad, 
obliquely acute, attenuate at base to a short stipe. On dry wooded hill- 
sides, Washington to California and 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 ‘y 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. decaphyllus Pursh Fl. 471. LZ. 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, 1-26 inches 
long, mostly obtuse at each end; stipules lanceolate, 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 l. 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, 4-14 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 
