200 GENUS CHRYSOTHAMNUS. 



long. This collection differs from all of the others in its somewhat thinner and less rigid 

 leaves and nearly glabrous involucres. It is probably a form of partially shaded places. 

 According to the original label, the plants were 3 to 4.5 dm. high. The range of C. latior 

 should perhaps be extended to Mount Hamilton, on the basis of a specimen collected in 

 June, 1890, by Price (Univ. Calif. Herb. 87224), but this is very incomplete and there is 

 some doubt as to the accuracy of the data. 



lid. Chrysothamnus parryi imulus, subsp. nov. — Plant about 1 dm. high; stems 

 spreading at base, the branches erect ; leaves spatulate or linear-spatulate, obtuse, mucro- 

 nate, 1 to 1.5 cm. long, 2 to 3 mm. wide, 1 -nerved, gray with a dense very tardily decidu- 

 ous tomentum, none overtopping the inflorescence; heads few, peduncled in a reduced 

 raceme; involucre 11 to 12 mm. high; bracts about 16, obscurely ranked, not keeled, thin, 

 oblong, pungently and rather abruptly acute, the outer sometimes with herbaceous red- 

 dish tips, white-tomentose ; flowers 11 to 15; corolla tubular-funnelform, 9 to 10 mm. long, 

 yellow or reddish, the tube glabrous or obscurely puberulent; lobes 1 to 1.5 mm. long, 

 nearly erect, either glabrous or sparsely villous; achenes silky-villous; pappus slightly 

 exceeding the corolla. Known only from the San Bernardino Mountains of southern 

 California. Collections: Bear Valley, San Bernardino Mountains, California, at 2,000 

 m. altitude, July 19, 1900, M, E. Jones (type, in Herb. Jones); same locality, 1896, 

 Davidson (UC). 



lie. Chrysothamnus parryi asper (Greene). — Plant 1.5 dm. or more high; stems 

 erect or slightly spreading; leaves 2 to 4 or 5 cm. long, 1 to 3 mm. wide, 1-nerved, firm, 

 green, slightly rough with numerous short-stalked resin-glands, the uppermost leaves 

 scarcely equaling the inflorescence; heads few in the short racemes, or more numerous 

 and the racemes longer (12 cm. in the type); involucre 11 to 12 mm. high; bracts 9 to 13, 

 somewhat ranked, thin, with straight tips; flowers 5 to 10. (C asper Greene, Leaflets 

 1 : 80, 1904.) On mountains bordering the desert, western Nevada and eastern California. 

 Type locality, Hockett Trail, in the valley of Little Cottonwood Creek, eastern slope of 

 the Sierra Nevada of Inyo County, California (see Coville, Contr. U. S. Nat. Herb. 4:271, 

 1893, under No. 1690). Collections: Bloody Canon, Mono County, California, August 

 13, 1898, Congdon (UC); type collection, Coville 1690 (US); Alamo Mountain, Ventura 

 County, California, Hall 6701 ; Lee Canon, Charleston Mountains, Nevada, Heller 11036 

 (DS, Gr, NY, UC, minor variation 17). 



11/. Chrysothamnus parryi vulcanicus (Greene). — Plant 1.5 dm. or more high; 

 stems erect or ascending; leaves 2 to 5 cm. long, 0.5 to 2 mm. wide, 1-nerved or obscurely 

 3-nerved, green and minutely resinous-glandular, or at least viscidulous, the uppermost 

 scarcely equaling the inflorescence; heads numerous, in elongated often lax racemes or 

 narrow panicles; involucre 11 to 13 mm. high; bracts 9 to 12, somewhat ranked, thin, 

 with straight attenuate tips; flowers 5 to 7. (C. vulcanicus Greene, 1. c.) In the southern 

 Sierra Nevada Mountains of California. Type locality, on Volcano Creek, above Vol- 

 cano Falls, at about 2,500 m. altitude. Collections: Tj^pe collection, August 9, 1904, 

 Culbertson 4361 (Gr, SF); Golden Trout Creek and Ramshaw Meadows, Hall 8413 

 (UC, US) ; Little Kern River, at 2,400 m. altitude. Hall 8457 (UC) ; Mono Mills, in sandy 

 soil beneath Pinus ponder osa, Hall 10844 (SF, UC). 



llg. Chrysothamnus parryi monocephalus (Nelson and Kennedy). — Plant 0.5 to 3 

 dm. high; stems rigidly branched, spreading; leaves 1 to 3 cm. long, 1.5 mm. or less wide, 

 1-nerved, rarely 2-nerved, gray, sparsely to copiously tomentulose, also viscidulous, the 

 uppermost usually exceeding the inflorescence; heads solitary or two together, terminal 

 on the short leafy twigs; involucre 10 to 11 mm. high; bracts about 8 to 12, the ranks very 

 obscure, thin, tapering to a straight attenuate apex; flowers 5 or 6. (C. monocephalus 



