276 LEGUMINOSJ]: Lathyrcs. 



nate ; peduncles 3-5-flowcred ; legumes broadly mear, compressed, acumi- 

 nate, pubescent. Hook. — Linn. sp. p. 1034 ; Eng. hot. t. 169 ; Mich.r. ! fi. 

 2. p. 66 ; Pursh, ji. 2. p. 471 ; Bigel.Ji. Bast. p. 209; DC. I. c. ; Hook. ! 

 f. Bor.-Ani. 1. p. 161. 



a. glabrous ; lateral and inferior segments of the calyx lanceolate (the 

 inferior one narrowest), about the length ol the tube; peduncles equalling or 

 exceeding the leaves; leaflets 3-4 pairs, varying from lanceolate to narrowly 

 elliptical. 



0. glabrous, rather flaccid ; lateral and inferior segments of the calyx linear- 

 subulate, longer than the tube.— L. occidentalis, Nuit.! mss. 



y. glabrous ; lateral segments of the calyx oblong, obtuse, shorter than the 

 tube. 



S. glabrous; lateral segments of the calyx triangular-subulate, much shorter 

 than the tube; stipules minute, linear-subulate. 



£. minutely pubescent; lateral segments of the calyx triangular-oblong, ob- 

 tuse, much shorter than the tube ; leaflets 4-5 pairs, rigid ; stem scarcely 

 winged. 



^. finely pubescent; lateral and inferior segments of the calyx narrowly 

 triangular-lanceolate, very acute, shorter than the tube ; peduncles 3-10-flow- 

 ered. — L. hydrophilus, Nutt. ! mss. 



r). pubescent ; lateral and inferior segments of the calyx linear- lanceolate or 

 linear, very acute, as long as the tube ; leaflets elliptical ; stipules much larger, 

 oblong. 



Swampy places and along streams, Canada ! (lat. 55°) to Pennsylvania ! 

 west to Oregon, p. mouth of the Oregon, NvUaU ! &. Saskatchawan Riv- 

 er, ex Hook.! £. California, Douglas! g. Marshes, Massachusetts, Mr. 

 Oakes! Western part of New- York ! r,. Dry soil, Uuoddy Head, Mame, 

 Mr. Oakes ! July-Aug.— Flowers rather large, bright purple. 



8. L. vestitiis (Nutt. ! mss.) : " erect and rigid or a little climbing, silky- 

 canescent; leaflets 5-7-pairs, small, elliptical or oval, cuspidate; tendrils 

 mostly pinnated; stipules broadly semisagittate, acuminata, slightly toothed 

 below, about the size of the leaflets ; racemes about the length of the leaves. 

 4-6-flowered ; flowers large, purple ; lower segments of the calyx narrowly lan- 

 ceolate, acuminate, rather longer than the tube ; legume flat, pubescent, atten- 

 uate at each end; style villous along the inside for about one-third its length. 



" Plains of the Oregon towards the sea. June.— A very distinct species. 

 a foot or more high, clothed with an appressed silky pubescence, except the 

 upper surface of the leaves, which is nearly glabrous. Stem erect in open 

 places, decumbent in shady situations. Leaflets half an inch or a little more 

 in length, and 2-3 lines wide. Calyx attenuate at the base." Nuttall. 



9. L. strictiis (Nutt. mss.) : "pubescent, rather rigid ; stem slender, angled; 

 leaflets 2-5 pairs, linear, acute; tendrils bifid; stipules semicordate, acumi- 

 nate, serrate ; peduncle about 4-flowered, longer than the leaf; flowers large ; 

 lower segments of the calyx acuminate, as long as or longer than the tube. 



"Busby places around St. Diego, California. April.— A small species, near- 

 ly allied to the preceding, of which it may perhaps be only a variety. Leaflets 

 remote, about 1-2 lines wide." Nuttall.— This species we have not seen. 



10. L. /mearr.? (Nutt. ! mss.) : "nearly glabrous; stem decumbent, slen- 

 der, angled ; leaves nearly sessile; leaflets 5-6 pairs, narroAvly linear, mostly 

 obtuse, apiculate, rigid ; tendrils short, simple or bifid ; stipules small, lan- 

 ceolate, semisagittate, laciniate-toothed or incised below; peduncles 3-4- 

 flowered, shorter than the leaves ; flowers rather large, pale purple; segments 

 of the calyx triangular-subulate, shorter than the tube ; legunie attenuated at 

 each end; style nearly filiform, villous all round at the summit. 



"Plains of the Platte. April. — A low decumbent species. Leaflets an 

 inch or more long, and about half a line wide. Stipules with 2-5 very sharp 



