BLAKE.^ — ENCELIA AND RELATED GENERA. 357 



Arizona: Ft. Mohave, 1S60-1, Cooper (GN); Beaver Dam, 1877, 

 Palmer 237 (GN) ; Santa Rosa to Casagrande, 13 Mar.-23 Apr. 1903, 

 Grifiths i008, 4025 (N); Tule Desert, W. of Monument no. ISO, 9 Feb. 

 1894, Mearns 2794 (N); without locality, 1880, Lemmon (G). 

 Sonora: near El Capitan, southwest of Sonorita, west of Pinacate, 

 5 Feb. 1910, Lumholtz 27 (G). 



1(3. G. CANESCENS Torr. & Gray var. paniculata (Gra^) Blake, 

 n. comb. Greener and less hirsute than the ordinary form, panicu- 

 lately much branched above, the very numerous heads only 2 cm. in 

 diameter including the rays. 



Encelia eriocephala var panicuhda Gray, Syn. Fl. i. pt. 2. 282 (1884). 



Specimens examined: Arizona: mesas near Phoenix, 17 June 1882, 

 Pringle 1271 (FGX, type collection). 



* * Heads discoid; involucral scales oblong, densely glandular; leaves all 

 sessile by a clasping base. 



2. G. viscida (Gray) Blake, n. comb. Stout, at least 8 dm. high 

 (the base unknown), hirsutely villous and viscid-glandular throughout; 

 stem channeled, simple or branched above, leafy; leaves thin, oval 

 or broadly ovate-oblong, acutish to obtuse or rounded, sessile by an 

 auriculate or cordate base, irregularly dentate on the wavy margin, 

 the mid vein prominent, 3-10 cm. long, 1.5-5 cm. wide; heads rather 

 few, terminating branchlets or long-pedunculate from the upper axils, 

 1.5-4 cm. broad, hemispherical; involucre shorter than the disk; 

 scales 2-3-seriate, subequal or the outer shorter, oblong, obtuse, 

 3-nerved, densely glandular, 11-15 mm. long, 2-5 mm. broad; disk- 

 corollas 7-8 mm. long, with rather long slender tube and cylindric 

 throat, somewhat glandular particularly on the tube; pales 14 mm. 

 long, glandular-pubescent toward apex; achenes 7-9 mm. long, with 

 two villoits awns more than half their length, narrowly wedge-shaped, 

 silky-A'illous, with blackish body and white margin and crown. 



Encelia (Geraea) viscida Gray, Proc. Am. Acad. xi. 78 (187(3). 



Specimens examined ; California : near Larkin's Station, 80 miles 

 east of San Diego, 1875, Palmer (type in Gray Herb.); Warner's 

 Ranch, and other elevated places in San Diego Co., June 1880, Parish 

 241 (G); Campo, June 1880, Vasey 327 (N); mountains near Campo, 

 24 July 1883, Orcutt (F) ; dry hills near Campo, 26 May 1903, Ahrams 

 3633 (FGX); Potrero Valley, San Diego Co., June 1889, Orcutt (N). 

 Lower California: without localitN', 1883, Orcutt (G). 



