A. VTJLGAEIS. 73 



(US); Cascade Mountains, 49° N. lat., Oregon, 1859, Lyall (Gr, minor variation 85, A. 

 tilesi elatior Torrey and Gray); Wallowa Mountains, Oregon, Piper 2491 (Gr, same 

 variation) ; Martin Creek, Elko County, Nevada, Kennedy 4S74. (UC, same variation) ; 

 Bozeman Canon, Montana, Rydberg 294S (NY, same variation). 



116. Artemisia vulgaris candicans (Rydberg). — Stems 5 to 15 dm. high, leafy, 

 from strong rootstocks, forming small bush-like clumps or thickets; lower leaves obovate 

 or broadly oblong, from deeply cut into spreading lanceolate lobes which are typically 

 again lobed or toothed to shallowly and obtusely few-lobed; principal leaves obovate or 

 oblanceolate or broadly elliptic in outUne, 4 to 10 cm. long, 1.5 to 4 cm. wide, pinnatifid 

 or divided into oblong or lanceolate often again cleft segments, these more or less diver- 

 gent or in some forms the leaves with only a few short coarse teeth or shallow lobes and 

 some nearly entire (minor variation 61, J., platyphylla Rydberg), those of the inflores- 

 cence less lobed to entire, all leaves densely white-tomentose on both sides, but especially 

 beneath, the margins very narrowly revolute; inflorescence a cylindric panicle, sometimes 

 divided into short, dense glomerules (the typical form) or more open by the elongation of 

 the peduncles (minor variation 19, A.floccosa Rydberg), 2 to 4 cm. broad; involucre hemi- 

 spheric, about 4 to 5 mm. high, 4 to 7 mm. broad, tomentose, 20- to 50-flowered {A. can- 

 dicans Rydberg, Bull. Torr. Club 24:296, 1897). Montana to western Wyoming, Idaho 

 and eastern Oregon and Washington. Type locality. Little Belt Mountains, Montana. 

 Collections: Type collection, August 18, 1896, Flodman 882 (NY, US); Lima, Montana, 

 Rydberg 29^2 (NY, US, type of A. floccosa Rydberg, minor variation 19); Cliff Creek, 

 Wyoming, August, 1900, Curtis (NY); Yellowstone Lake, Wyoming, Nelson 6612 (R, 

 type of A. gracilenta Nelson, minor variation 25); Gilmore, in the Lemhi Range of 

 eastern Idaho, Hall 11548 (UC); near Prineville, Oregon, Leiberg 801 (NY); Spokane 

 River at Spokane, Washington, Elmer 867 (NY, type collection of A. platyphylla Ryd- 

 berg, minor variation 61); same locality, September and October, 1921, Moore (UC, a 

 large series of leaf-variations connecting candicans and platyphylla). 



lie. Artemisia vulgaris typica. — Stems erect, 5 to 15 dm. high, from shallow root- 

 stocks, often growing in small clumps; lower leaves obovate, cut nearly to the midrib 

 into unequal lobes with toothed or incised margins; principal leaves obovate, broadly 

 elliptic or oblanceolate in outline, 5 to 10 cm. long, 3 to 7 cm. wide, cleft nearly to the 

 midrib into unequal segments (the terminal much the largest) which are again irregularly 

 toothed or more deeply cleft, the lobes and teeth all pointing forwards and approximate, 

 the leaves of the inflorescence simply pinnatifid to entire, all leaves smooth, green and 

 glabrous or nearly so above, densely and permanently white-tomentose beneath, the mar- 

 gins obscurely revolute; inflorescence an ample branching leafy panicle with ascending 

 branches along which the heads are disposed in glomerules, 4 to 20 cm. broad (occa- 

 sionally reduced to a single compact panicle about 3 cm. broad) ; involucre campanulate, 

 3.5 to 4 mm. high, 2.5 to 3.5 mm. broad, cinerous-tomentose, 15- to 25-flowered. {A. 

 vulgaris Linnaeus, Sp. PI., 848, 1753.) Widely distributed in the Old World; probably 

 introduced in America, where it now grows at many places from Newfoundland to 

 Georgia, Alabama, Wisconsin, Manitoba, and Ontario; also in British Columbia and 

 on Martinique. Type locaUty: Europe. Collections: Prince County, Prince Edward 

 Island, Fernald, Long, and St. John 8231 (Gr); Nova Scotia, Howe and Lang 157 (NY); 

 Birchy Cove, western Newfoundland, on rubbish heaps, Fernald and Wiegand 4167 

 (Gr); Yarmouth, St. John River, at St. Francis, Maine, Fernald 70 (Gr, NY, UC, US); 

 Point Edward, Lake Huron, Ontario, Macoun 26353 (US); New Haven, Connecticut, 

 September 28, 1886, Setchell (UC); near Andover, New Jersey, September 26, 1887, 

 Britton (UC); Rochester, New York, August 16, 1917, House (Gr); Detroit, Michi- 

 gan, September 1, 1915, Chandler (US); Lake Vadnais, Ramsey County, Minnesota, 



