1916] 
GREENMAN—MONOGRAPH OF SENECIO 119 
rescence a few to many-headed corymbose суше; involucre 
campanulate, sparingly calyculate; heads 7 to 10 mm. high, 
radiate; braets of the involucre 13 to 21, linear-lanceolate, 5 
to 6 mm. long, acute, glabrous; ray-flowers 10 to 12, rays 
bright yellow ; disk-flowers numerous ; achenes glabrous. 
Distribution: mountains of Utah and Nevada. 
Specimens examined: 
Utah: moist rocks and shady woods, Peterson Cañon, 
Peterson, alt. 2895 m., 19 July, 1902, Pammel £ Blackwood 
3870 (Mo. Bot. Gard. Herb.), TYPE. 
Nevada: Ruby Mountains, near Blaine post-office, Elko Co., 
alt. 2710 m., 27 Aug., 1913, Heller 11096 (U. S. Nat. Herb. and 
Mo. Bot. Gard. Herb.). 
53. S. aureus L. Sp. Pl. 2:870. 1753, ed. 2, 1220. 1763, and 
ed. 3, 1220. 1764; Michx. ЕІ. 2: 120. 1803; Willd. Sp. РІ. 3:1998. 
1804; Pursh, Fl. Am. Sept. 2:530. 1814, and ed. 2, 1816; Nutt. 
Gen. 2:165. 1818; Ell. Sketch 2:331. 1824; Bigel. Fl. Bost. 307. 
1824; Sprengl, Syst. Veg. 3:560. 1826, excl. syn.; DC. Prodr. 
6:432. 1837; Torr. & Gray, Fl. N. Am. 2:442. 1843, in part; 
Torr. in Nicollet’s Report, App. B, 153 [237]. 1845; Gray, 
Syn. Fl. N. Am. 1? :391. 1884, and ed. 2, 1886, in part; Macoun, 
Cat. Canadian РІ. 264. 1884, in part; Millsp. Med. Pl. 1:91, pl. 
91. 1892; Goodale, Wild Fls. of Am. 77, pl. 15. 1894; Britton & 
Brown, Ill. Fl. 3:480, fig. 4047. 1898, and ed. 2, 544, fig. 4625. 
1913, in part; Greenm. in Rhodora 3:4. 1901; Monogr. Senecio, 
I. Teil, 23. 1901, and in Engl. Bot. Jahrb. 32:19. 1902; Britton, 
Manual 1028. 1901, and ed. 2, 1905; Greenm. in Gray, Manual, 
ed. 7, 854. 1908; Small & Carter, Fl. Lancaster County 310. 
1913. 
S. tussilaginoides Walt. Fl. Carol. 208. 1788. 
S. rotundifolius Stokes, Bot. Mat. Med. 4:215. 1812. 
S. fastigiatus Schwein. ex Ell. Sketeh 2:331. 1824. 
An herbaceous perennial; stems one to several from a rela- 
tively slender rootstock, 3 to 6 dm. high, glabrous or not infre- 
quently white-tomentulose in the leaf-axils, along the margins 
of the petioles, and in the inflorescence; lower leaves petiolate, 
undivided and rotund-ovate, somewhat triangular-ovate to 
