FLOWERING PLANTS AND FERNS OF ARIZONA 565 



A shrub, up to 2 m. high, the leaves varying greatly in size according 

 to the moisture supply. The flowers open in the evening, according 

 to C. G. Pringle, who collected the type of A. lemmoni in the Santa 

 Catalina Mountains. 



8. Abutilon palmeri A. Gray, Amer. Acad. Arts and Sci. Proc. 8: 289. 



1870. 



Abutilon parishii S. Wats., ibid. 20: 357. 1885. 



Along Salt River (eastern Maricopa County), Santa Catalina Moun- 

 tains and Bates Well to Quitobaquito (Pima County), 1,100 to 3.0(H) 

 (?) feet, dry rocky slopes, April and May, type of A. parishii from the 

 Santa Catalina Mountains {Pringle in 1884). Southern Arizona, 

 Sonora, and Baja California. 



9. Abutilon sonorae A. Gray, PL Wright. 2: 23. 1853. 



Pinal, Santa Cruz, and Pima Counties, 3,000 to 4,000 feet, not 

 infrequent in rich soil near streams, August to October, type [Wright 

 899) collected ''on the Sonoita," probably in southwestern Cochise 

 County. Southern Arizona and ^lexico. 



10. Abutilon reventum S. Wats., Amer. Acad. Arts and Sci. Proc. 21: 



418. 1886. 



Santa Catalina and Baboquivari Mountains (Pima County), 3,000 

 to 4,000 feet, rich soil near streams, April to September. Southern 

 Arizona and Mexico. 



Plant very similar in appearance to A. sonorae. Petals bright 

 yellow, not orange as in most of the species. 



2. HORSFORDIA 



Plants shrubby, densely stellate-canescent or tomentose, the 

 pubescence yellowish; leaf blades denticulate or crenulate, thick, 

 truncate or subcordate at base: flowers axillary, solitary or in few- 

 flowered clusters, often assembled in leafy panicles; carpels 8 to 12, the 

 winged apical portion green, bluish, or purplish, often slightly erose, 

 promptly dehiscent. 



Key to the species 

 1. Leaf blades ovate-lanceolate; petals yellow, about 8 mm. long. 



1. H. XEWBERRYI. 



1. Leaf blades ovate, usuallv broadly so; petals pink, 10 to 15 mm. long. 



2. H. ALATA. 



1. Horsfordia newberryi (S. Wats.) A. Grav, Amer. Acad. Arts and 

 Sci. Proc. 22: 297. 1887. 



Abutilon newberryi S.Wats., ibid. 11: 125. 1876. 



Pinal, Maricopa, Pima, and Yuma Counties, 1,500 to 2,000 feet. 

 dry, rocky hillsides, March to October, type from the Purple Hills. 

 Yuma County {Newberry in 1858). Southern Arizona, southeastern 

 California, Sonora, and Baja California. 



Stems commonlv 1 to 2 m. high. 



