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



1. Cassia armata S. Wats., Amer. Acad. Arts and Sci. Proc. 9: 136. 



1876. 



Xerocassia armata Britt. and Rose, North Amer. Fl. 23: 246. 

 1930. 



Yucca, Mohave County (Meire in 1917), 1,800 feet, February to 

 October. Deserts of western Arizona, southern Nevada, and south- 

 eastern California. 



A shrub about 1 m. high, leafless most of the year. 



2. Cassia wislizeni A. Gray, PL Wright. 1: 60. 1852. 



P aimer ocassia wislizeni Britton, North Amer. Fl. 23: 254. 1930. 



Cochise County, 4,000 to 5,000 feet, dry slopes and mesas, usually 

 on limestone, August and September. Southern Texas to south- 

 eastern Arizona and northern Mexico. 



A much-branched shrub up to 1.5 m. (5 feet) high, with dark-colored 

 bark and prominent lenticels. 



3. Cassia leptocarpa Benth., Linnaea 22: 528. 1849. 



Ditremexa leptocarpa Britt and Rose, North Amer. Fl. 23: 256. 

 1930. 



Cochise, Pinal, and Pima Counties, 2,500 to 5,000 feet, along streams 

 and washes, July to September. New Mexico and southern Arizona 

 to South America. 



A handsome but rather coarse plant, with large terminal panicles of 

 bright yellow flowers, the foliage ill smelling. The Arizona form is var. 

 glaberrima M. E. Jones {Ditremexa glaberrima Britton, Cassia good- 

 dingii A. Nels.), less pubescent and with narrower leaflets than most 

 Mexican specimens of C. leptocarpa. 



4. Cassia absus L., Sp. PL 376. 1753. 



Grimaldia absus Britt. and Rose, North Amer. Fl. 23: 299. 

 1930. 



Western slope of the Baboquivari Mountains, Pima County, 5,000 

 feet(?), granitic slopes and ridges (Oilman B212, B234), September. 

 Widely distributed in tropical America, supposed to have been intro- 

 duced from the Old World. 



The presence of the plant in such a remote locality in Arizona is 

 difficult to explain. 



5. Cassia wrightii A. Gray, PL Wright. 2: 50. 1853. 



Chamaecrista wrightii Woot. and Standi., Contrib. U. S. Natl. 

 Herbarium 19: 335. 1915. 



Santa Cruz County (probably elsewhere in southern Arizona), 

 3,500 to 5,000 feet, open chaparral, August. Southeastern Arizona 

 and northeastern Sonora. 



Partridge-pea, sensitive-pea, names applied generally to the subgenus 

 Chamaecrista. 



