1010 MISC. PUBLICATION 42 3, U. S. DEPT. OF AGRICULTURE 



666), seems intermediate between S. uintahensis and S. neomexicanus , 

 and is not clearly distinct from either. 



13. Senecio bigelovii A. Gray, U. S. Rpt. Expl. Miss. Pacif. 4: 111. 



1857. 



Senecio rusbyi Greene, Torrey Bot. Club Bui. 9: 64. 1882. 



San Francisco Peaks to Long Valley (Coconino County), White 

 Mountains (Apache and Greenlee Counties), Pinaleno Mountains 

 (Graham County), and mountains of Cochise and Pima Counties 

 7,000 to 11,000 feet, rich moist soil in coniferous forests, July to 

 September. New Mexico and Arizona. 



14. Senecio seemannii Schultz Bip. in Seem., Bot. Voy. Herald 311. 



1856. 



Mountains of Cochise, Santa Cruz, and Pima Counties, about 

 6,000 feet, rich shaded soil, September and October. Southern 

 Arizona and northern Mexico. 



Senecio hartwegi Benth., to which the Arizona plant has generally 

 been referred, is, according to Greenman, 12 a distinct species of west- 

 central Mexico, with the branches, petioles, and lower leaf surface 

 tomentose. 



15. Senecio salignus DC, Prodr. 6: 430. 1837. 



Cochise, Santa Cruz, and Pima Counties, near the Mexican bound- 

 ary, 2,300 to 4,500 feet, rich soil along streams, February to April. 

 Southern Arizona to Guatemala. 



A shrub, up to at least 2 m. (7 feet) high. 



16. Senecio parryi A. Gray in Torr., U. S. and Mex. Bound. Bot. 103. 



1859. 

 Chiricahua Mountains, Cochise County (Harrison and Kearney 

 6135), Santa Rita Mountains, Pima County (Thornber 331), about 

 6,000 feet, July to September. Western Texas to southern California. 



17. Senecio mohavensis A. Gray, Syn. Fl. I 2 : 446. 1884. 



Sacaton Mountains, Pinal County (Peebles and Harrison 1076), 

 Laguna Dam, Yuma County (Peebles and Harrison 5059), 2,000 feet 

 or lower, sandy washes and bottoms of canyons, March. South- 

 western Arizona, southeastern California, and Sonora. 



18. Senecio huachucanus A. Gray, Amer. Acad. Arts and Sci. Proc. 



19: 54. 1883. 

 Near Fort Huachuca, Cochise County (Lemmon 2784, in 1882, the 

 type collection), September and October. Southeastern Arizona and 

 Chihuahua. 



19. Senecio lemmoni A. Gray, Amer. Acad. Arts and Sci. Proc. 17: 



220. 1882. 



Senecio decorticans A. Nels., Amer. Jour. Bot. 23: 266. 1936. 



Gila, Maricopa, Pinal, and Pima Counties, 1,500 to 3,700 feet, 

 rocky slopes usually among shrubs, common, February to May, 

 type of S. lemmoni from the Santa Catalina Mountains (Lemmon 

 389), types of S. decorticans from along Salt River, near the Apache 

 Trail (Nelson 10309 and 11287). Southern Arizona and northern 

 Baja California. 



12 Greenman, J. M. Senecio in Standley, Paul C. trees and shrubs of mexico. Contrib. U. S. 

 Natl. Herbarium 23: 1926. (See p. 1628.) 



