A. NORVEGICA. 59 



to eastern Siberia. Type locality, Rocky Mountains. Collections: Union Peak, 

 Wyoming, Nelson 897 (Gr); high mountains about Empire, Colorado, Patterson 218 

 (Or); Ethel Peak, Larimer County, Colorado, Goodding 1891 (Gr, NY, UC, US); near 

 Mineral King, southern Sierra Nevada Mountains, California, Hall and Babcock 5659 

 (DS, UC); mountains above Bear Valley, near Lake Tahoe, California, July 29, 1889, 

 Sonne (UC) ; Horse Shoe Basin, Okanogan County, Washington, Elmer 705 (NY, nearly 

 glabrous, minor variation 1, A. arctica Lessing); Olympic Mountains, Washington, 

 Elmer 2618 (DS, NY, moderately pubescent, intermediate to minor variation 1, A. 

 arctica Lessing); head of Smoky River, Alberta, Riley SO (US, glabrous form, type of 

 A. levigata Standley, minor variation 9); Fisk Creek, Selkirk Mountains, British Colum- 

 bia, Butters and Holway 436a (Gr, minor variation I, A. arctica Lessing); Glacier River, 

 Unalaska, Van Dyke 73 (Gr, minor variation \, A. arctica Lessing, green and nearly 

 glabrous); St. Paul Island, Bering Sea, Macoun 94013, very pubescent (NY), and 94014, 

 green and nearly glabrous (Gr). 



5b. Artemisia norvegica heterophylla (Besser). — Stems 0.5 to 2 dm. high; foliage 

 silvery-canescent or silky, usually densely so (least so or even glabrate in A. comata 

 Rydberg, minor variation 2), somewhat villous with spreading hairs (in A. richardsoniana 

 Besser, minor variation 12); lower leaves 1 to 6 cm. long, the blade roundish in outline 

 and 1 to 3 cm. long, 1 to 3 times dissected into linear barely acute divisions; inflorescence 

 spike-like, 4 to 10 cm. long, congested toward the summit but often open and raceme-like 

 below; heads small, the involucre 3.5 to 4.5 mm. high; disk-flowers 10 to 25 or more, 

 their corollas 3 to 3.5 mm. long. (A. heterophylla Besser, Nouv. Mem. Soc. Nat. Mosc. 

 3:74, 1834.) Eastern Siberia and Arctic shores of North America to Great Slave Lake 

 and the high mountains of Washington. Type locality, St. Lawrence Bay, Bering Strait, 

 eastern Siberia. Collections: Arctic Coast of Canada, Richardson (US, type collection 

 of A. richardsoniana Besser, minor variation 12) ; Camden Bay, Alaska, on gravel tundra, 

 Johansen 122 (NY, type collection of A. comata Rydberg, minor variation 3); sandspit 

 at Martin Point, Alaska, Johansen 134 (NY, minor variation 3, A. comata Rydberg); 

 Bernard Harbor, northern Canada, in gravel tundra, Johansen 337 (NY, form with 

 villous pubescence, A. richardsoniana Besser, minor variation 12); Bernard Harbor, 

 northern Canada, on sandy slopes and sand dunes, Johansen 304 o.nd 304a (NY, form 

 with silvery pubescence and dark-margined bracts, minor variation 8, A. hyperborea 

 Rydberg, of which Johansen's 304 is the type number); Copper Island, September 3, 

 1891, Macoun (Gr, form near minor variation 8, A. hyperborea Rydberg); vicinity of 

 Norton Sound, Alaska, 1900, Macgregor; Mount Rainier, Washington, August 27, 



1896, Flett (US, type of A. tacomensis Rydberg, minor variation 14). 



5c. Artemisia norvegica globularia (Chamisso). — Stems 0.4 to 1 dm. high; 

 foliage gray with a dense silky-villous pubescence, varying to sparsely pubescent and 

 green; lower leaves 1 to 3 cm. long, the blade flabelliform or obovate in outline and less 

 than 1 cm. long, once or twice ternately divided into broadly linear or elliptic acute 

 divisions, the petiole wide and flat; inflorescence a single terminal globoid cluster of 

 heads, 1 to 2 cm. across; heads rather large, the involucre 4 to 6 mm. high; disk-flowers 

 about 50 to 120, their corollas 3 to 4 mm. long. {A. globularia Chamisso; Besser, Nouv. 

 Mem. Soc. Nat. Mosc. 3:64, 1834.) Western Alaska and eastern Siberia. Type 

 locality, St. Lawrence Bay, Siberia. Collections: St. George Island, Bering Sea, July 

 31, 1891, Macoun (Gr); St. George Island, Bering Sea, June 29, 1920, Johnston (SF, 

 densely pubescent, gray); same, but on cliffs, August 13, 1920, Johnston (SF, sparsely 

 pubescent, green); St. Paul Island, Bering Sea, August, 1920, Hanna (SF); St. Paul 

 Island, Bering Sea, Macoun 94015 (Gr, NY); St. Paul Island, Bering Sea, August 15, 



1897, Kincaid (UC); St. Matthew Island, Bering Sea, Macoun 87 (NY); type collection 

 (Gr, ex-herb. Acad. Petrop.). 



