500 MISC. PUBLICATION 4 2 3, U. S. DEPT. OF AGRICULTURE 



3. Lathyrus graminifolius (S. Wats.) White, Torrey Bot. Club Bui. 

 21: 454. 1894. 



Lathyrus palustris L. var. graminifolius S. Wats., Amer. Acad. 

 Arts and Sci. Proc. 23: 263. l! 



Apache County to Coconino County, south to Cochise, Santa Cruz, 

 and Pima Counties, 6,000 to 9,500 feet, common, chiefly in pine for- 

 ests, May to September. Utah, New Mexico, and Arizona, doubtless 

 also in northern Mexico. 



4. Lathyrus parvifolius S. Wats., Amer. Acad. Arts and Sci. Proc. 

 17: 345. 1882. 



Lathyrus shaffneri Rydb., N. Y. Bot. Gard. Mem. 1: 258. 

 1882. 



Apache County to Coconino County, south to Graham and Pima 

 Counties, 5,000 to 9,000 feet, frequent in oak chaparral and pine 

 forests, June to August. Southern Utah and Arizona to California 

 and southern Mexico. 



51. CLITORIA. Butterfly-pea 



Plant herbaceous, perennial, glabrous or nearly so; stems usually 

 erect or ascending ; leaves pinnately 3-foliolate, the leaflets large, ovate- 

 lanceolate or oblong-lanceolate, the stipules and stipels subulate, 

 persistent; flowers axillary, mostly solitary, sometimes 2 or 3 in a 

 cluster, 5 to 6 cm. long; calyx tubular, 5-toothed; corolla with an erect 

 banner much larger than the other petals; pods narrowly oblong, 

 several-seeded. 



1. Clitoria mariana L., Sp. PL 753. 1753. 



Sierra Ancha (Gila County) and mountains of Cochise, Santa Cruz, 

 and Pima Counties, from the Chiricahua to the Baboquivari Moun- 

 tains, 4,000 to 5,500 feet, rich soil among live oaks and junipers, 

 July and August. New Jersey to Florida and Texas, also southern 

 Arizona. 



This handsome plant is outstanding among the Leguminosae of 

 Arizona in the very large size of its lilac-colored corolla. It is also 

 remarkable as an example of interrupted distribution, being appar- 

 ently absent in the area between central Texas and southeastern 

 Arizona. It is infrequent in Arizona except in the Chiricahua 

 Mountains and in Santa Cruz County, where it is reported to be locally 

 abundant. 



52. COLOGANIA 



Plants perennial, herbaceous ; stems trailing to nearly erect, scarcely 

 twining; leaves pinnately 3-foliolate or occasionally 5-foliolate; 

 flowers axillary, nearly sessile, solitary or in clusters of 2 or 3; calyx 

 tubular, 4-toothed; corolla reddish purple; pods flat, narrowly oblong, 

 several-seeded. 



Plants rather insignificant except for the fairly large, richly colored 

 flowers, 



