190 Proceedings of the Biological Society of Washington. 



Hook., but the former has coriaceous or subcoriaceous leaflets and ciliate 

 calyx, while the latter has fewer leaflets always obtuse. 



Lathyrus ochropetalus holochlorus, n. subsp. 



Leaflets very thin, green on both sides; flowers cream-colored. 

 Hills south of Corvallis, Oregon, H. C. Gilbert No. 115, May 2, 1916. 

 Type sheet No. 719,814 in U. S. National Herbarium. 



Lathyrus peckii, n. sp. 



Loosely pubescent throughout; stems slender, prominently angled, 

 60-90 cm. high; leaves with 2 or 3 widely separated pairs of leaflets, and 

 well developed tendrils; stipules ovate, sinuate-dentate, acute at each end, 

 the lower lobe only one-fourth as long as the upper; leaflets elliptic-lanceo- 

 late to broadly lanceolate, cuspidately acute, subacute at base, mem- 

 branaceous, pubescent on both sides, paler beneath, 10-15 mm. long; 

 peduncles exceeding the leaves about 5-flowered; pedicels pubescent as 

 long as the calyx; calyx glabrous except the ciliation, the 2 upper teeth 

 short, broadly triangular, the lateral and ventral much longer, lanceolate; 

 corolla apparently violet, 15-18 mm. long; ovary puberulent; full grown 

 pods linear 3-3.5 cm. long. 



In thickets, Harbor, Curry County, Oregon, M. E. Peck No. 4008, 

 July 31, 1913. 



Seemingly unconnected with any described form, but simulating closely 

 L. lanceolatus Howell, from which it differs in its fewer leaflets, broad 

 stipules and marked pubescence. 



Lathyrus coriaceus aridus, n. subsp. 



Stems erect 20-30 cm. high, angled; stipules very narrow; leaflets linear 

 to linear-lanceolate, 4-7 cm. long, finely puberulent on both sides; tendrils 

 simple; flowers 9-12 mostly 10 mm. long; calyx puberulent or rarely 

 glabrous. 



The subspecies differs essentially from the species in its narrower leaflets, 

 simple tendrils and smaller flowers. 



Specimens have been examined as follows: 

 Washington: Falcon Valley, Suksdorf April 28, 1885. 

 Oregon: Black Butte, Crook Co., Cusick No. 2814; type, sheet 



444,540 in U. S. National Herbarium. Squaw Creek, Cusick 

 No. 2659; Farewell Bend, Leiberg No. 433; the calyx 

 of this specimen glabrous, but the leaves puberulent. 

 California: Big Trees, Stanislaus Forest, Eggleston No. 9212; Yose- 

 mite National Park, Hall No. 8883; Rochester, Parish 

 May 28, 1891; Quincy, Heller No. 10851; Wood Canon, 

 Grapevine Mts., Coville & Funston No. 1760. 

 The last named specimen was published as L. palustns in the Botany 

 of the Death Valley Expedition, and has larger flowers than any other 

 specimen, namely 12 mm. long. Hall's specimen is said to have the cor- 

 olla white, but rose-veined on the standard, and is labeled L. graminifolius 



