430 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



* Artemisia candicans Rydberg, Bull. Torr. Bot. Club, 24: 296. 



This species has once or twice pinnately divided leaves which are 

 grayish above, white beneath, and with oblong segments, and com- 

 paratively large heads, 5-8 mm. wdde, with tomentose bracts. It 

 growls on hillsides and in sand}' soil, at an altitude of about 2000 m. 



Montana: Little Belt Mountains, i8g6, J. H. Flodnian, 882. 



Yellowstone Park: East DeLacy's Creek, Aug. 10, 1897, 

 Rydherg & Bessey, 3204. (2 depauperate specimens). 



Idaho : Mt. Chauvet, July 29, 1897, Rydberg d- Bcsscy, 5203. 



* Artemisia floccosa Rydberg, Bull. Torr, Bot. Club, 24: 297. 



The leaves of this species are white-tomentose on both sides, and 

 have narrowly oblong orlinear-oblong segments. The heads are some- 

 what smaller than in the preceding, wdth densely tomentose involucres. 

 In well developed specimens the heads are mostly pedicelled, and 

 were so described in the original description, but they are not always 

 so. In the Yellowstone Park specimens the leaves have narrower 

 segments than in the type. It grows at an altitude of 2000-2500 m. 



Montana: Lima, 1895, Rydherg, 24^2. 



Yellowstone Park : Lake, 1884, Tzvcedy, 183; 1885, 6gi. 



* Artemisia elatior (Torr. & Gray) ; Artemisia Tilesii elatior Torr. 



& Gray, Fl. N. Am. 2: 422; Artemisia vulgaris Californica 



Gray, Syn. Fl. i" : 373, in part; not A. Californica Less. 



The true A. vulgaris is not a native of America and only found 

 introduced in the East. Its leaves are generally more or less twice 

 compound, with oblong or spatulate segments, while the American 

 representatives have simply pinnately divided leaves with lanceolate 

 acute or acuminate segments. The. northern ^. Z/Y^s// has rather 

 few large heads in a glomerate inflorescence; A. elatior has rather 

 large nodding heads in an ample panicle ; while a third species from 

 the Pacific coast has small cylindric heads, but otherwise resembles 

 A. elatior. 



Montana: Belt Park, 1886, R. S. Williams, 208; Bozeman, 

 1895, Rydberg, 2^44; Belt Mountains, 1883, Scribner, iij. 



Artemisia incompta Nutt. Trans. Am. Phil. Soc. (II.) 7 : 400 ; A. dis- 

 color incomfta Gray, Syn. Fl. i' : 373 [Man. R. M. 202]. 

 This I think is a good species, more related to A. vulgaris than to 



A. discolor. From the former it differs mostly in the form of the 



segments of the leaves. It grows on hillsides, at an altitude of 2000- 



2500 m. 



