182 GENUS CHRYSOTHAMNUS. 



56. Chrtsothamnus viscidiflorus pumilus (Nuttall). — Shrub 1 to 5 dm. high; 

 leaves linear, pungently acute, 2 to 4 cm. long, 1 to 2 mm. wide, 1-nerved or often 

 3-nerved, plane or tortuous, bright green, viscidulous or slightly glandular and the 

 margins sometimes scabrid, otherwise glabrous; cyme small but sometimes lax, its 

 branches glabrous; involucre 5 to 6 mm. high; bracts oblong, not keeled, the outer ones 

 acute, the inner obtuse or submucronate, all devoid of subapical spot; achenes moderately 

 or densely strigose. (C. pumilus Nuttall, Trans. Am. Phil. Soc. II, 7:323, 1840, in part, 

 namely, as to the smooth plants.) Plains and foothills, Montana to Colorado, Utah, 

 eastern California, and Washington. Type locality, on the borders of Lewis River 

 and the Rocky Mountain Plains. Collections: Type collection. Rocky Mountains, 

 Nuttall (Phila.); Sedan, Gallatin County, Montana, August 10, 1902, W. W. Jones 

 (Gr); Wamsutter, southwestern Wyoming, August IS, 1894, Wooton (US); Laramie, 

 southeastern Wyoming, Nelson 6861 (NY); head of Poison Creek, Utah, Rydberg and 

 Carlton 7435 (NY); Bear Valley, San Bernardino Mountains, California, Abrams 2889 

 (UC); Sonora Trail, easterly slope of the Sierra Nevada, California, State Survey 1859 

 (UC, an unusual variation with broad involucres only 4.5 mm. high, the bracts very 

 obtuse); near Hay Fork Post Office, Crook County, Oregon, Leiberg 862 (US, inter- 

 mediate to stenophyllus; leaves 1 to 1.5 mm. wide); Spokane, Washington, Kreager 

 613 (NY); Pocatello, Idaho, July 30, 1889, Greene (UC). 



5c. Chrysothamnus viscidiflorus puberulus (D. C. Eaton). — Low shrub, 2 to 5 

 dm. high; leaves narrowly linear, acute, 1.5 to 4 cm. long, rarely over 1 mm. wide, 

 1-nerved, often twisted or revolute, pale grayish-green, densely puberulent; cyme small, 

 compact (occasionally looser and up to 7 cm. broad), its branches densely puberulent; 

 involucre about 6 mm. high; bracts oblong, not keeled, obtuse or the outer barely 

 acute, devoid of subapical spot; achenes densely strigose or silky. (Linosyris viscidi- 

 flora var. puberula Eaton, Bot. King's Expl. 158, 1871.) Montana to Colorado, eastern 

 California, and British Columbia; abundant on dry hills and in dry streamways of 

 Nevada. Type locality, near the Truckee and on the Hot Springs Mountains in 

 western Nevada. Collections : Type collections, Truckee Valley, northwestern Nevada, 

 July, 1867, W. W. Bailey 569 (Gr, US), and West Humboldt Mountains, northwestern 

 Nevada, 1,900 m. altitude, September, 1867, Watson 569 (Gr); Crook Creek, Fremont 

 County, Wyoming, Goodding 524 (UC, nearly glabrous, distributed as C. pumilus); 

 Sevier River, below Marysvale, Utah, Rydberg and Carlton 6993 (NY, type of C. maria- 

 nus Rydberg, minor variation 22); Caliente, Nevada, August 27, 1912, Jones (DS, UC); 

 Lander County, Nevada, Kennedy 4533 (DS, UC); Mesa west of Goldfield, Nevada, 

 Heller 10973 (DS, Gr, NY, UC, US) ; Reno, on dry banks near Truckee River, Nevada, 

 Hall 10547 (UC); Benton,Mono County, California, Hall 10677 (UC); near Redmond, 

 Oregon, September 29, 1918, Whited (UC); Crook County, Oregon, Coville and Leiberg 

 664, 732, and 773 (US); Shoshone, Idaho, Palmer 511 (NY). 



bd. Chrysothamnus viscidiflorus humilis (Greene). — Low shrub, commonly only 1 

 to 2 but sometimes 3 dm. high; leaves linear or slightly oblanceolate, 1 to 2 cm. long, 

 1 to 2 mm. wide, 1-nerved or an occasional leaf with 3 nerves, usually plane, very pale 

 or grayish-green, densely puberulent; cyme usually small and compact, sometimes 

 rather loose and spreading, its branches densely puberulent; involucre 6 to 7 mm. high; 

 bracts oblong, not keeled, obtuse, devoid of subapical spot; achenes densely strigose. 

 (C. humilis Greene, Pittonia 3:24, 1896.) Arid plains of northeastern California and 

 eastern Oregon, extending into western Nevada. Type locality, plains of the Truckee 

 River, Nevada County, California. Collections: Type collection, sagebrush plains in 

 Martis Valley, near Truckee, August, 1895, Sonne (Herb. Greene, NY, UC); Christmas 

 Lake, Lake County, Oregon, Leiberg 772 (DS, Gr, UC, US, leaves up to 3 cm. long); 



