158 LEGUMINOSJE. 



LATHYHUS. 



linear-oblong, 1-2 inches long. Edges of copses, Western Washington to 

 California. 



L. pauciflorus Fernald Bot. Gaz. xix, 335. Glabrous throughout: 

 stems rather slender, 2-3 feet high : stipules semi sagittate, acuminate, 

 8-12 lines long, coarsely toothed below; leaflets 4-5 pairs, oblong, 6-18 

 lines long, 4-6 lines broad, acutish, spinulose apiculate, nearly sessile : 

 peduncles about equalling the leaves, 2-5 flowered; corolla 6-8 lines long ; 

 upper teeth of the calyx triangular, acuminate, nearly as long as the sub- 

 ulate lateral ones, the lower one setaceous and nearly as long as the keel 

 of the corol'a: fruit not seen. In copses, southern Oregon to Utah and 

 Idaho. 



■*- +- Stipules narrow, semisagittate, the lubes usually lanceolate, 

 acuminate : flowers purple or purplish. 



++ Leaflets 4-6 pairs : peduncles rather many-flowered. 



L. Bolanderi Watson Proc. Am. Acad, xx, 363. Stems usually stout 

 and tall, wingless : glabrous throughout or the calyx only ciliate ; stipules 

 semisagittate, often toothed: leaflets 3-5 pairs, oblong-lanceolate to broad- 

 ly ovate, obtuse or retuse to acute, 6-18 lines long or more: racemes about 

 equalling the leaves, 8-10 flowered ; calyx-teeth broad, the lowest elongated ; 

 petals purple, 6-9 lines long: pods linear, attenuate to the base, 2-2% 

 inches long, 3-4 lines broad. Oregon and California. 



L. lanceolatus. Stems rather slender, 1-2 feet high, not winged, pu- 

 bescent with small soft hairs intermixed with minute dark-colored glands ; 

 leaflets 4-5 pairs, lanceolate, acute, 6-12 lines long, pubescent beneath, 

 smooth above; stipules small, semisagittate, acuminate, 6-8 lines long, 2-3 

 lines broad : peduncles about equalling the leaves, 3-6 flowered ; flowers 

 blue or violet, 8-10 lines long; calyx dark purple, pubescent, the tube 3-4 

 lines long, the lateral teeth triangular, 2 lines long, the lower one seta- 

 ceous, but little longer; ovary glabrous, 10-16 ovuled: fruit not seen. In 

 forests at Glendale, southern Oregon. 



L. JVuttallii Watson 1. c. xxi. 450. More or less pubescent throughout 

 with loose wooly hairs ; stems rather stout, 1-2 feet high : stipules narrow, 

 semisagittate : leaflets 3-6 pairs, variable, narrowly to broadly elliptical, 

 usually acute or acutish at both ends, apiculate, 1-2 inches long: pe- 

 duncles shorter than or equalling the leaves, calyx light purple, 3-4 lines 

 long, the 4 upper teeth triangular, acuminate, the lower one subulate, but 

 little longer than the lateral ones ; petals reddish purple, 6-8 lines long: 

 pods glabrous, oblong, attenuate to a very short thick stipe, l-\% inches 

 long by 4 lines broad; seeds globose, brown. In copses, Brit. Columbia to 

 California. 



L. vestitus Nutt. T. & G. Fl. i, 276. Stems erect and rigid or a little 

 climbing, silky-canescent, 1 foot or more high: leaflets 5-7 pairs, small, 

 elliptical or oval, cuspidate, 6-7 lines long by 2-3 broad, silky pubescent 

 beneath, smooth above; stipules broadly semisagittate, acuminate, slight- 

 ly toothed below, about the size of the leaflets : peduncles about the 

 length of tlie leaves, 4-6-flowered ; flowers large, purple : calyx attenuate 

 at base, the lower segment narrowly lanceolate, acuminate, rather longer 

 than the tube: pods flat, pubescent, attenuate at each end. Plains of the 

 Oregon toward (lie sen. Nuttall, not since reported. 



-- ++ Leaflets 4-8; peduncles 2-6-flowered. 



L, eoriaceus White Bull. 'Poir. Club, xxi. 452. Glabrous or minutely 

 papillose throughout ; stems erect, 6-18 inches high, rather stout, flexuous, 

 quadrangular or terete, wingless, scarcely striate: stipules semisagittate, 

 lanceolate, acuminate, 4-12 lines long; leaflets 3-6 pairs, sub-opposite, 

 i hick and coriaceous, strongly venulose on both sides, elliptical to linear- 

 lanceolate, obtuse or acute, 1)^-3 inches long by 2-8 lines broad : pedun- 



