FLOWERING PLANTS AND FERNS OF ARIZONA 425 



6. Cassia leptadenia Greenm., Amer. Acad. Arts and Sci. Proc. 41: 



238. 1905. 



Chamaecrista leptadenia Cockerell, Muhlenbergia 4: 68. 1908. 



Greenlee, Pinal (or Gila), Cochise, Santa Cruz, and Pima Counties, 

 3,500 to 4,000 feet, dry plains and mesas, August to October. Western 

 Texas to Arizona and Mexico. 



Very similar to C. nictitans L. of the eastern United States, but the 

 plant has ciliate leaflets, narrower pods, and stems usually with long 

 spreading hairs, as well as shorter more appressed ones. 



7. Cassia bauhinioides A. Gray, Boston Jour. Nat. Hist. 6: 180- 



1850. 



Earleocassia bauhinioides Britton, North Amer. Fl. 23: 248. 

 1930. 



Coconino, Mohave, Yavapai, and Greenlee Counties to Cochise, 

 Santa Cruz, and Pima Counties, 2,000 to 5,000 feet, dry rocky slopes 

 and mesas, May to August. Texas to Arizona and Mexico. 



The common form in this State is var. arizonica Robinson, with 

 hairs of the stem appressed or subappressed, but the typical form, also 

 with spreading hairs, likewise occurs. 



8. Cassia covesii A. Gray, Amer. Acad. Arts and Sci. Proc. 7: 399. 



1868. 



Earleocassia covesii Britton, North Amer. Fl. 23: 249. 1930. 



Distribution in Arizona and habitat same as for C. bauhinioides, but 

 usually at somewhat lower altitudes, mostly 1,000 to 3,000 feet. 

 New Mexico to Nevada, Arizona, California, and northwestern 

 Mexico. 



9. Cassia lindheimeriana Scheele, Linnaea 21: 457. 1848. 



Earleocassia lindheimeriana Britton, North Amer. Fl. 23: 249. 

 1930. 



Cochise County, 4,900 to 5,600 feet, dry mesas and foothills, June 

 to September. Texas to southeastern Arizona and northern Mexico. 



10. PARKINSONIAN Paloverde 



A large shrub or small tree, attaining a height of 12 m. (40 feet) and 

 a trunk diameter of 30 cm. (1 foot); bark smooth, yellowish green, 

 becoming brown; leaves bipinnate but simulating a pair of elongate, 

 simply pinnate leaves (the common rachis almost none), the rachis of 

 the pinnae broad, flat, up to 60 cm. long, the leaflets many, fugacious; 

 flowers moderately irregular, showy, bright yellow, in elongate 

 racemes; pods turgid, nearly terete, torulose. 



1. Parkinsonia aculeata L., Sp. PL 375. 1753. 



Foothills of the Coyote and Baboquivari Mountains, Pima County, 

 occasional in sandy soil along washes, also south of Tucson, where 



82 Reference: Johxstox, I. M. pareixsoxia and cercidivm. Contrib. Gray Herbarium ser. 2, 70 : 

 61-68. 1924. 



