BLAKE. — ENCELIA AND RELATED GENERA. 363 



on the younger parts, the branchlets ending in long naked monocepha- 

 lous peduncles; leaves short-petioled, oblong to ovate, obtuse or acute, 

 cuneate or truncate at base, scabrous with scattered white hairs 

 with persistent tuberculate bases, 1-3 cm. long, 0.6-1.6 cm. wide; 

 involucre 6-10 mm. high, its scales somewhat unec^ual, 3-rowed, 

 hispid-scabrous and sometimes slightly glandular, varying from linear- 

 lanceolate to ovate-acuminate; heads 1-2.5 cm. broad; rays rarely 

 present, then about 12, 3-lobed, about 9 mm. long; disk-corollas 5-6 

 mm. long, with glandular-hairy tube and hairy limb; pales glandular- 

 pubescent, 1 cm. long; achenes black with narrow white margin, 

 villous on the edges and somewhat pubescent on the sides, 6.5-8 mm. 

 long, 2.5-3.2 mm. broad, awnless or with 1 or 2 weak villous awns. 



Simsia frutcscefis Gray in Torr. Bot. Mex. Bound. 89 (1859). 



Encelia frutescens Gray, Proc. Am. Acad. viii. 657 (1873). 



E.fruicscensi. radiata RaW, Univ. Calif. Pub. Bot. iii. 135 (1907). 



E. frutescens f. ovata Hall, 1. c. 



Specimens examined: California: Mohave Desert, near Bagdad, 

 12 Apr. 1905, Wilcox (N); The Needles, 3 May 1884, Jones 3812 

 (FN); near Caiion Springs, x\pr. 1905, Hall 5859 (N); Palm Spring, 

 alt. 61 m., 10 Ma3' 1903, .Jones (N); wash near Coyote Wells, Colo- 

 rado Desert, 3 Nov. 1890, OrciM 2200 (GN); Signal Mt., 2 Apr. 1903, 

 Ahrams 3156 (FGN, cotj'pe number of f. omta Hall) ; interior of Cali- 

 fornia, 1849, Fremont (G, cotype); Arizona: ravines in gravel plain. 

 Ft. Mohave, 1860-1, Cooper, (GN, mixed with Viguiera Parishii 

 Greene); Sierra Prieta near Ft. Yuma, Schott (G, cotype); Agua 

 Caliente, 1846, Emory (G, cotype); Yuma, 1881, Vasey (N); west 

 bank of Colorado River below Yuma, 7 Apr. 1894, Mearns 2853 (N) ; 

 Yuma, 25 Apr. 1906, Jones (N); Santa Catalina Mts., Apr. 1881, 

 Lemmon 188 (G); Red Rock, 11 June 1892, Tourney 671 (N); Car- 

 rizo Creek, Hayes 446 (G) ; mesas near Tucson, 8 May 1884, Pringle 

 (FGN, cotype number of f . oraia Hall) ; mesas, without exact locality, 

 15 May 1881, Pringle (FG); foothills, Santa Rita Mts., 1902, Griffiihs 

 & TJiornber (N); high plains, Lowell, 9 May 1884, W. F. Parish 

 110 (G); Wilmot Siding, 8 miles southeast of Tucson, on the mesas, 

 800 m., 6 June 1903, Thornber 83 (N); without locality, 1869, 

 Palmer (N). 



The form ovata described by Hall seems hardly distinct enough for 

 recognition; apparently the lower leaves are always more or less ovate 

 or ovate-oblong, the upper usually oblong but sometimes broader, but 

 without any distinct line of demarcation; and the presence of rays, 

 also, is a character scarcely requiring recognition by name. 



