74 



GENUS ARTEMISIA. 



Sandberg 711 (US); Brunswick, Glynn County, Georgia, Harper 1527 (Gr, NY, US); 

 Linnton, Oregon, J. C. Nelson 837 (Gr); flood plain of the Columbia River, British 

 Columbia, Shaw 1170 (US); vicinity of St. Pierre, Martinique, Pere Dussl737, 1^075 (US). 



Fio. 7. — A comparison of leaf-outlines of Arlemisia vulgaria typica and A. v. heterophylla: a, b, c, d, leaves of typica from one 

 plant in the Botanical Garden of the University of California; e, /, g, h, i, leaves of heterophylla from one plant 

 in the Oakland Hills, California. All X 0.5 



lid. Artemisia vulgaris discolor (Douglas). — Stems erect, 2 to 8 dm. high, from 

 horizontal sometimes suffrutescent rootstocks; lower leaves obovate or oblanceolate, cut 

 nearly to the midrib into spreading divisions which are again toothed or more deeply 

 lobed; principal leaves obovate or broadly elliptic in outline, 2 to 8 cm. long, 1 to 4 cm. 

 wide, dissected nearly to the midrib into linear or lanceolate lobes, these either entire, 

 toothed, or lobed, the leaves toward the inflorescence simply cleft or entire, all green and 

 glabrous or glabrate above, densely to sparsely white-tomentose beneath, the margins 

 commonly revolute; inflorescence a compact panicle, sometimes raceme-like, 1 to 3 cm. 

 broad or much broader when composed of racemiform branches; involucre campanula te, 

 3.5 to 4 mm. high, 2 to 4 mm. broad, very sparsely tomentose and glabrate or glabrous 

 from the beginning, yellowish-green, somewhat shining, 20- to 50- flowered. {A. dis- 

 color Douglas in Hooker, Fl. Bor. Am. 1:322, as synonym, 1833; Besser, Bull. Soc. Nat. 

 Mosc. 9:46, 1836.) The three most notable variations under this subspecies are diag- 

 nosed under A. michauxiana, page 84, and specimens belonging to them are indicated in 

 the following citations. Saskatchewan and Montana to Colorado, the Sierra Nevada of 

 California, and British Columbia. Type locality, near Spokane and Kettle Falls, 

 Washington. Collections: Lake Louise region, Alberta, Rosendahl 1097 (NY, minor 

 variation 53, A. michauxiana Besser); Bridger Mountains, Montana, August 21, 1902, 

 W. W. Jones (DS, UC, US, genuine); Long Baldy, Little Belt Mountains, Montana, 



