356 PROCEEDINGS OF THE AMERICAN ACADEMY. 
Simsia section Geraea Gray, Pl. Fendl. 85 (1849). 
Encelia section Geraea Benth. & Hook. fil. Gen. Pl. ii. 378 (1873). 
* Heads radiate; involucral scales linear, densely ciliate; lower leaves nar- 
to a petiolar 
1. G.caANEscENS Torr. & Gray. Erect annual, 1-6 dm. high, simple 
or branched from the base, hirsute with white hairs intermixed with 
stalked glands; leaves lance-oblong, ovate, or obovate, narrowed to a 
margined base, 1-7 cm. long, 0.3-0.4 em. wide, acute, 3-nerved, bluntly 
or acutely toothed mostly above the middle, those of inflorescence 
bracteiform, all alternate or rarely one or two pairs of opposite ones 
at base of stem; heads few, somewhat panicled, terminating branchlets 
or long-peduncled from the upper axils, 5 em. in diameter when well 
developed; involucre 8-12 mm. high, 2-3-rowed; the scales subequal 
or the outer a little shorter, linear-lanceolate, glandular on the back, 
3-nerved inside, densely ciliate except at tip with long white hairs; 
rays 10-14, golden yellow, cuneate, subentire or tridentate, 11-21 mm. 
long, 6-11 mm. wide, the tube hairy; disk-corollas 6 mm. long, with 
short glandular-hairy tube and cylindric-funnelform throat; pales 
9 mm. long, fimbriate-margined, glandular-hairy toward the narrowed 
apex; achenes narrowly cuneate, 6-7 mm. long, silky-villous, with 
poke et denticulate awns half their length, the body black, the narrow 
white margin continuous with the awns and the thick entire yellowish 
crown. 
Geraea canescens Torr. & Gray, |. c. (1847). 
Simsia (Geraea) canescens Gray, Pl. Fendl. 1. c. (1849). 
Encelia eriocephala Gray, Proc. Am. Acad. viii. 657 (1873). 
Specimens examined: Uran: southeastern part, 1870, Palmer (N); 
Nevapa: El Dorado Caiion, Lincoln Co., Jan.—Apr. 1895, Lyra Mulls 
12 (N); valley of the Virgin River, 6 May 1891, V. Bailey (Death 
Valley Exp. no. 1911: N); Catrrorn1a: Furnace Creek Cafion, Funeral 
Mts., alt. 100 m., Feb. 1891, Coville & Funston 361 (N); 8 miles N. 
of Salton Sea, Apr 1910, Mrs. C. H. Everhart 2 (F); Palm Springs, 
alt. 150 m., 19 Apr. 1907, S. B. Parish 6079 (F); The Needles, 3 May 
1884, Jones 3783 (FN); Agua Caliente, Mar. 1881 and Apr. 1882, 
Parish Bros. 228 (FN); Agua Caliente, W. G. Wright (G); Colorado 
Desert, Apr. 1889, Orcutt (N); same locality, W right (FN); loose soil, 
near Calexico, 28 Mar. 1903, Abrams 3153 (G); in sandhills, Jan., Ft. 
Yuma, Schott (G); diluvial banks of the Colorado near Ft. Yuma, 
Schott. (F); Colorado River, Newberry (G); interior of California, 
Fremont 393 of 1844, Coulter 304 (coryres in Gray Herbarium); 
