Rydberg : Rocky Mountain flora 649 



This has been taken for C. hispid a, but the original Diplopappus 

 hispidus Hook, is less hairy with longer hairs and more viscid ; the 

 leaves are narrowly oblanceolate and petioled and the heads larger, 

 the disk being 12-15 mm. wide. C. horrida grows on dry hills 

 and plains at an altitude of 1 200-1600 m. 



Colorado: New Windsor, 1900, Osterhout 2326 (type), and 

 1 90 1, 2362 ; Platte, Fremont. 



Nebraska: Pumpkin Seed Valley and Lawrence Fork, 1891, 

 Rydberg 141 . 



Chrysopsis alpicola sp. now 



Cespitose perennial ; stems about 1 dm. high, silky-villous, 

 numerous ; leaves oblanceolate, about 3 cm. long ; nearly all 

 petioled, white-silky strigose or the pubescence more spreading on 

 the petioles ; heads solitary, subsessile, about 1 cm. high ; bracts 

 linear-lanceolate, hirsute, acute ; disk about I 2 mm. in diameter ; 

 rays about 8 mm. long and 2 mm. wide ; achenes white silky- 

 hirsute. 



This is perhaps most closely related to C. Bakcri, but is much 

 lower, more silky, with sessile heads and more hirsute involucre. 

 It grows on the higher mountains, at an altitude of about 3500 m. 



Colorado : Clark's Peak, 1 896, Baker. 



Solidago rubra sp. nov. 



Stout, about 3 dm. high ; stem pubescent or at the base merely 

 puberulent, reddish; basal and lower cauline leaves broadly oblance- 

 olate, 6-12 cm. long, firm, bluish-green, glabrous, pinnately veined, 

 serrulate and minutely scabrous on the margins, acute, petioled ; 

 upper stem-leaves sessile and lanceolate ; inflorescence paniculate 

 but very narrow and elongated ; heads about 8 mm. high, and as 

 broad ; bracts narrowly linear-lanceolate, acute, ciliolate on the 

 margin ; rays rather pale yellow, about 4 mm. long and 0.7 mm. 

 wide ; achenes strigose. 



This species is related to 5. scopulorum, but is distinguished by 

 the stouter habit, the broad leaves, the compound and dense in- 

 florescence. 



Colorado: North Park, 1899, Osterhout 5. 



Solidago laevicaulis sp. nov. 



Rather tall, 4-7 dm. high ; stem glabrous up to the inflores- 

 cence, light-colored and shining ; basal leaves narrowly oblanceo- 



