375] FLORA OF BOULDER, COLORADO 227 



Very abundant on the plains, mesas, and foothills, 5100- 

 7000 ft. (Daniels, 385). 

 Wyoming to Colorado. 



1005a. G. semilata Rydb. X Cr. perennis A. Nels. 



Plants apparently intermediate between this species and the 

 next were found on the plains in Boulder (Daniels, 837). 



1006. G. perennis A. Nels. Perennial gum plant. 

 Plains, mesas, and foothills, 5100-7000 ft. (Daniels, 836). 

 Saskatchewan to Idaho and Colorado. 



1007. G. erecta A. Nels. Erect gum plant. 

 Mountains between Sunshine and Ward (Rydberg). 

 Wyoming to Colorado. 



1008. G, subalpina Greene. Subalpine gum plant. 

 Common at Eldora, 8500-10000 ft. (Daniels, 845). Also at 



Boulder (Rydberg). 

 Wyoming to Colorado. 



1009. G. Eldorae Daniels, Nov. sp. Eldora gum plant. 

 Plant glabrous, apparently biennial, 3 dm. tall, branched 



from, or near the base, the secondary branches j-2 headed; 

 radical and lower cauline leaves oblanceolate, 3-6 cm. long, 

 slender-petioled, remotely toothed or incised; upper cauline 

 leaves, linear or narrowly oblanceolate, small and bract-like, 

 slightly toothed, subentire, or entire, 1-3 cm. long, 5-8 mm. 

 wide; heads copiously glutinous, i-iyi cm. broad; bracts num- 

 erous, narrow, the tips squarrose-spreading ; rays numerous, 

 1-3 mm. wide, barbules of the pappus plainly obvious. 



Eldora, 8500-8700 ft. (Daniels, 859). 



Plant near G. subalpina Greene, but differing in its smaller, 

 narrower and less prominently toothed or entire leaves, and 

 especially in its smaller heads, which are only about one-half 

 as broad. 



436. CHEYSOPSIS Nutt. Golden aster. 

 loio. C. hirsutissima Greene. Hairiest golden aster. 



Plains between Boulder and Marshall along railroad, 5400 

 ft. (Daniels, 1024). 



