1916] 
GREENMAN—MONOGRAPH OF SENECIO 179 
Nat. Herb., Greene Herb., and Mo. Bot. Gard Herb.), түрЕ; 
near Fort Bridger, coll. of 1873, Pruddon (Gray Herb.). 
Colorado: Denver, Lieut. Wheeler’s Expedition, 1873, 
Wolf £ Rothrock 558 (Gray Herb. and С. S. Nat. Herb.) ; 
Union Creek Pass, Lieut. Wheeler’s Expedition, 1873, Wolf 
& Rothrock 586 (U. S. Nat. Herb. and Gray Herb.). 
New Mexico: Costilla Valley, alt. 3000 m., 5 Sept., 1913, 
Wooton (U. S. Nat. Herb.). 
77. S.tridenticulatus Rydb. Bull. Torr. Bot. Club 27:175. 
1900; Fl. Colo. 396. 1906. 
S. compactus (Gray) Rydb. Mem. Torr. Bot. Club 5:342. 
1894, not Kirk in Trans. N. Z. Inst. 12:395. 1880; Heller, Cat. 
N. Am. Pl. 146. 1898, and ed. 2, 229. 1900; Britton & Brown, 
Il. Fl. 3:480, fig. 4045. 1898; Greenm. Monogr. Senecio, I. 
Teil, 24. 1901, and in Engl. Bot. Jahrb. 32:20. 1902; Britton, 
Manual 1028. 1901, and ed. 2, 1905. 
S. aureus var. compactus Gray, Syn. Fl. N. Am. 1?:391. 
1884, and ed. 2, 1886. 
S. aureus var. borealis Gray, Pl. Wright., pt. 1, p.125. 1852, 
not Torr. & Gray. 
S. oblanceolatus Rydb. Bull. Torr. Bot. Club 27:175, pl. 5, 
fig. 9. 1900; Fl. Colo. 396. 1906; Wooton & Standley, Contr. 
U. S. Nat. Herb. 19:747. 1915. 
S. densus Greene, Pittonia 4:226. 1900; Britton & Brown, 
Ш. Fl. 3:546, fig. 4631. 1913. 
S. condensatus Rydb. КІ. Colo. 396. 1906, not Greene. 
S. mutabilis Nelson in Coulter & Nelson, Manual Cent. 
Rocky Mountains 583. 1909, mainly, not Greene. 
S. manitobensis Greenm. Ottawa Nat. 25:117. 1911, mainly. 
S. suavis Lunell, Am. Mid. Nat. 2:125. 1911. 
S. Metcalfei Greene, Contr. U. S. Nat. Herb. 16:193. 1913; 
Wooton & Standley, Contr. U. S. Nat. Herb. 19:748. 1915. 
S. remifolius Wooton & Standley, Contr. U. S. Nat. Herb. 
16:194. 1913. 
An herbaeeous perennial, glabrous or somewhat white- 
floeceose-tomentulose and later glabrate except at the base 
and in the leaf-axils; stems one to several, frequently rather 
