A. VULGARIS. 79 



campanulate, about 4 mm. high, 3 to 4 mm. broad, densely tomentose, sometimes a 

 little glabrate, 20- to 30-flowered. (.4. longifolia Nuttall, Genera 2:142, 1818.) South- 

 central Canada to Nebraska, Colorado, Wyoming, and Montana; also west to Oregon 

 and Washington, according to North American Flora. Type locality, rocky situations 

 on the banks of the Missouri River. Collections: Saskatchewan, 1858, Bourgeau (Gr, 

 a form with leaves green above and a very open inflorescence) ; vicinity of Rosedale, 

 Alberta, Moodie 1097 (DS, Gr, SF, NY); Fort Pierre, Nebraska, July, 1853, Hayden 

 Survey (NY) ; Lake De Smet, Wyoming, Nelson 8545 (UC, NY, US) ; Washington County, 

 South Dakota, August, 1886, Hatcher (UC); plains, Colgate, near Glendive, eastern 

 Montana, Sandberg 1011, 1014 (Gr, NY, SF, US). 



111. Artemisia vulgaris serrata (Nuttall). — Stems strictly erect, 10 to 30 dm. 

 high, from rootstocks; lower leaves lanceolate, closely and rather evenly serrate (for 

 deviations see fig. 13); principal leaves lanceolate or linear-lanceolate, acuminate, 7 to 

 15 cm. long, 1 to 2.5 cm. wide, serrate like the lower, only the very tip and about 1 cm. 

 near the base entire, the teeth 2 mm. or less long, those of the inflorescence gradually 

 reduced, narrower and mostly entire, all of the leaves green and glabrous above, white- 

 tomentose beneath, the margins sometimes obscurely revolute; inflorescence a leafy 

 panicle, 5 to 15 cm. broad; involucre narrowly campanulate, 2.7 to 3 mm. high, about 

 2 mm. broad, more or less floccose, 12- to 20-flowered. (A. serrata Nuttall, Genera 

 2:142, 1818.) Restricted to the central and northern portions of the Mississippi Valley, 

 except as naturalized further east, as in northern New York; Wisconsin to northern 

 Illinois, Kansas (?), Iowa, North Dakota, and Minnesota. Type locality, near the 

 Prairie du Chien, on the banks of the Mississippi River. Collections : Upper Louisiana, 

 Nuttall (Phila, one of the type collections); Taj^lors Falls, Minnesota, August, 1892, 

 Taylor (DS, NY, UC, US); Glenwood, Minnesota, August, 1891, Taylor (UC, typical 

 in every detail except that the leaves are entire); Dane County, Wisconsin, Wibbe 

 (US); prairies of Winnebago County, Illinois, August, 1859, Bebb (Gr); Fayette County, 

 Iowa, Fink 4O4 (US). 



11m. Artemisia vulgaris lindleyana (Besser). — Stems erect, 1.5 to 4 dm. high, 

 usually several from a woody rootstock; lower leaves oblanceolate, toothed or lobed; 

 principal leaves linear or oblanceolate in outline, 2 to 5 cm. long, 0.4 to 1.5 cm. wide, 

 sharply toothed or cleft into short divergent lanceolate lobes, the upper ones mostly 

 entire, loosely floccose or green and glabrate above, white-tomentose beneath; inflores- 

 cence a short and narrow raceme-like panicle (sometimes completely racemose, sometimes 

 with a few erect racemiform branches), 0.5 to 2 cm. broad; involucre campanulate, 3 to 

 4 mm. high, 2 to 3 mm. broad, tomentose, but the tomentum often thin and partly 

 deciduous; heads 18- to 30-flowered. {A. lindleyana Besser, in Hooker, Fl. Bor. Am. 

 1:322, 1833.) West of the Rocky Mountains from Montana to Utah, Arizona, eastern 

 California, Washington, and Idaho. Type locality, northwest coast of America. Col- 

 lections: Type collections, northwest America, Douglas (Gr, ex-herb. Lindley, fragments 

 of legitima, brevifolia, subdentata, coronopus, leaves entire to once-cleft, minor variations 

 38 to 41); Lewis River, Rocky Mountains, Nuttall (Gr, Phila, type of A. pumila Nuttall, 

 minor variation 66); head of dry wash, Abajo Mountains, southeastern Utah, Rydberg 

 and Garrett 9615 (NY); Holbrook, Arizona, October 9, 1897, Zuck (NY, inflorescence 

 racemose-spicate but otherwise like minor variation 76, A. silvicola Osterhout); Sequoia 

 National Park, southern Sierra Nevada, California, Davidson 2057 (UC); Fish Hook 

 Ferry, eastern Oregon, Leiberg 935 (NY, type of A. leibergi Rydberg, minor variation 35) ; 

 banks of the Columbia River, Washington, Suksdorf 1611 (UC, Gr, NY); Clarks Fork 

 Valley, Idaho, Leiberg 1567 (UC); near Thompson Mountain, northern Idaho, Leiberg 

 1610 (NY, inflorescence inclined to branch). 



