BLAKE.— ENCELIA AND RELATED GENERA. 357 
Arizona: Ft. Mohave, 1860-1, Cooper (GN); Beaver Dam, 1877, 
Palmer 237 (GN); Santa Rosa to Casagrande, 13 Mar.—23 Apr. 1903, 
Griffiths 4008, 4025 (N); Tule Desert, W. of Monument no. 180, 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) 
18. G. canescens Torr. & Gray var. paniculata (Gray) Blake, 
-n. comb. Greener and less hirsute than the ordinary form, panicu- 
lately much branched above, the very numerous heads only 2 em. in 
diameter including the rays. 
Encelia eriocephala var paniculata Gray, Syn. FI. i. pt. 2. 282 (1884). 
Specimens examined: ARIZONA: mesas near Phoenix, 17 June 1882, 
Pringle 1271 (FGN, 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 midvein prominent, 3-10 em. long, 1.5-5 em. wide; heads rather 
few, terminating branchlets or long-pedunculate from the upper axils, 
1.5-4 cm. broad, hemispherital; 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 villous awns more than half their length, narrowly wedge-shaped, 
silky-villous, with blackish body and white margin and crown. 
Encelia (Geraea) viscida Gray, Proc. Am. Acad. xi. 78 (1876). 
Specimens examined: CatrrorNia: 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, Oreutt (F); dry hills near Campo, 26 May 1903, Abrams 
3633 (FGN); Potrero Valley, San Diego Co., June 1889, Orcutt (N). 
Lower Cauirorni: without locality, 1883, Orcutt (G). 
