C. NAUSROSUS. 213 



Oregon, Leiberg 884 (Gr, UC, US); Warm Springs, Cook County, Oregon, Coville and 

 Applegate 724 (US); Poison, Montana, Urnbach 227 (NY); Marysvale, Utah, Jones 5967 

 (NY, UC); California: Modoc County, near the Oregon line, Clements and Hall 11662 

 (UC); Big Meadows, August, 1880, Austin (Herb. Greene, type of C. orthophyllus Greene, 

 minor variation 63); Honey Lake Valley, Lassen County, Clements and Hall 11681 (UC); 

 Truckee, Nevada County, Heller 7192 (Gr, NY, UC, minor variation 25, C. californicus 

 Greene); near Bridgeport, Mono County, Bolander 6169 (UC, same variation); near 

 Reno, Nevada, August, 1883, Brandegee (UC, same variation). 



12f. Chrysothamnus nauseosus typicus. — Low shrub 2 to 6 dm. high, woody only 

 at the base, usually rounded and not as broad as high, often nearly prostrate; twigs mostly 

 erect, very leafy, not striate, gray or at the most whitish with a smooth clo.se tomentum 

 (white in minor variation 64); herbage not strongly scented; leaves narrowly linear, 2 

 to 5 cm. long, 0.5 to 1.5 mm. wide, either spreading or ascending, white-tomentose; inflor- 

 escence cymose or elongated; involucre 6.5 to 8 mm. high; bracts rather obtuse, scarcely 

 keeled, the outer ones tomentulose and somewhat glandular, ciliolate at least at summit, 

 the innermost only puberulent or glabrous; corolla 6.5 to 8 mm. long (9 mm. in one col- 

 lection); tube puberulent, rarely arachnoid; lobes linear-lanceolate, 1.2 to 2 mm. long; 

 style-appendage longer than the stigmatic part or sometimes slightly shorter; achenes 

 densely pubescent. (Chrysocoma nauseosa Pallas in Pursh, Fl. Am. Sept. 2:517, 1814.) 

 Assiniboia and Montana to South Dakota, Colorado, Utah, and British Columbia; often 

 on bleak or alkaline plains, especially common in Wyoming and eastern Colorado. Type 

 locality, on the banks of the Missouri. Collections: Type collection, Lewis (Phila, see 

 under Chrysocortia nauseosa, p. 219; Sedan, Gallatin County, Montana, August 12, 1902, 

 W. W. Jones (Gr, UC) ;' Great Falls, Montana, Anderson 89 (UC) ;^ Pennington County, 

 South Dakota, abundant in bad lands. Over 1804 (US);^ Douglas, Converse County, 

 Wyoming, Nelson 9001 (R, UC);= Howell Lakes, Wyoming, Nelson 5315 (NY, UC);> 

 Laramie, Wyoming, July 29, 1889, Greene (Herb. Greene, UC, US);' Huttons Lake, 

 Wyoming, Nelson 5300 (R, Gr, NY, UC, US, type collection of C.frigidus concolor Nelson, 

 minor variation 36) ; near Laramie, Wyoming, Nelson 5347 (R, Gr, NY, type collection of 

 C. pallidus Nelsqn, minor variation 64); New Windsor, Weldon County, Colorado, 

 Osterhout 2335 (NY, R, UC) ;= near Kanab, Utah, Jones 6047d (US) ;' Milk River, Assini- 

 boia, Macoun 10871 (US).' 



12^. Chrysothamnus nauseosus salicifolius (Rydberg). — Shrub 3 to 10 dm. high, 

 with erect branches; twigs erect or ascending, very leafy to the summit, plainly striate, 

 gray with a thin loose tomentum or nearly green; herbage probably not fragrant; leaves 

 broadly linear, 4 to 8 cm. long, 3 to 5 mm. wide, 3-nerved, minutely tomentulose; inflor- 

 escence cymose, dense; involucre 7 to 8 mm. high; bracts mostly obtuse, not keeled, 

 the ranks obscure, the outer (more acute) ones slightly tomentulose, the inner glabrous 

 or only ciliate; corolla about 10 mm. long, tube only minutely puberulent; lobes 1.5 to 2 

 mm. long; style-appendage longer than the stigmatic portion; achenes densely pubescent. 

 (C salicifolius Rydberg, Bull. Torr. Club 37:130, 1910.) Apparently rare and confined 

 to Utah. T>-pe locality, Strawberry Valley, Utah. Collections: Type collection, 2,150 

 m. altitude, Leonard 288 (NY) ; near Salt Lake City, Utah, Garrett 2455 (NY) ; Twelve- 

 mile Creek, Utah, ^Yard 659 (Gr). 



12/i. Chrysothamnus nauseosus occidentalis (Greene). — Shrub probably rather 

 low, with numerous short, slender, erect branches; twigs ascending, leafy, striate, gray- 

 tomentose, but not loosely or flocculently so; herbage not strongly odorous; leaves nar- 

 rowly linear, 4 cm. or less long, mostly less than 1 mm. wide, but occasionally up to 3 



' The form of typicus described as C. frigidus Greene, minor variation 35, p. 220. 

 * The form of lypicua described aa C. plattensia Greene, minor variation 67, p. 222. 



