FLOWERING PLANTS AND FERNS OF ARIZONA 967 



1. Cosmos parviflorus (Jacq.) H. B. K., Nov. Gen. et Sp. 4: 241. 



1820. 



Coreopsis parviflora Jacq., PL Hort. Schoenbr. 3: 65. 1798. 



Near Flagstaff and on theMogollon Escarpment (Coconino County), 

 and from the Chiricahua to the Santa Rita Mountains (Cochise, 

 Santa Cruz, and Pima Counties), apparently rare in northern Arizona, 

 4,000 to 7,500 feet, hillsides and canyons, sometimes in cultivated 

 land, July to October. Southeastern Colorado to southwestern Texas, 

 Arizona, and Mexico. 



77. BEBBIA 



An intricately branched shrub with slender branches; leaves few, 

 linear, the lower ones opposite; heads yellow, discoid, solitary or few 

 and terminal; involucre strongly graduated; achenes somewhat com- 

 pressed; pappus of about 20 plumose bristlelike awns. 



1. Bebbia juncea (Benth.) Greene, Calif. Acad. Sci. Bui. 1: 180. 



1885. 



Carphephorus junceus Benth., Bot. Voy. Sulph. 21. 1844. 



Grand Canyon (Coconino County) and Mohave County to Pima 

 and Yuma Counties, up to 4,000 feet, dry slopes and washes, flower- 

 ing most of the year. Arizona, southern Nevada and California, 

 and northwestern Mexico. 



The plant is a shrub with rushlike branches. The typical form, 

 with glabrous stems, is less common in Arizona than var. aspera 

 Greene (B. aspera A. Xels.) which has the stems more or less hispidu- 

 lous with usually tuberculate-based, often deciduous hairs. 



78. GALINSOGA^ 



Annual herbs; leaves opposite, narrowly lanceolate or the lower 

 leaves lance-ovate, toothed, petioled; heads small, radiate, the rays 

 white, very small, the disk yellow; achenes small, obovoid, somewhat 

 thickened; pappus of the disk flower of about 20 fimbriate subequal 

 squamellae or paleae, in the ray flowers reduced or wanting, in a 

 rare variety wanting in both rays and disk. 



1. Galinsoga semicalva (A. Grav) St. John and White, Rhodora 22: 

 100. 1920. 



Galinsoga parti flora var. semicalva A. Grav, PL Wright. 2: 98. 

 1853. 



Mountains of Cochise and Pima Counties, 5.300 to 8,100 feet, rich 

 soil in shade, September and October. Southern New Mexico and 

 Arizona, and northern Mexico. 



In the typical form the disk achenes are finely hispidulous and bear 

 a pappus of about 20 blunt fringed squamellae or paleae nearly as 

 long as the corolla, and the ray achenes are glabrous or usually some- 

 what hispidulous above on the inner face, and bear a reduced pappus 

 or none. In var. pierealra Blake, known only from the Santa Rita 

 Mountains, Pima County (Griffiths and Thornber 162, type), both ray 

 and disk achenes are glabrous and epappose. 



62 Reference: St. John. Harold, and White, Donald, the genus galinsoga in north america. 

 Rhodora 22: 97-101. 1920. 



