1916] 
GREENMAN—MONOGRAPH OF SENECIO 187 
few to many-headed glabrous or somewhat pubescent corym- 
bose eyme; heads 10 to 15 mm. high, radiate; involucre cam- 
panulate, calyculate; bracts of the involucre 13 to 21, linear- 
lanceolate, 7 to 9 mm. long, glabrous or nearly so; ray- 
flowers 10 to 12, rays yellow; disk-flowers numerous; achenes 
striate, glabrous. 
Distribution: Mexico. 
Specimens examined: 
Coahuila: south of Saltillo, Feb.-Oct., 1880, Dr. E. Palmer 
(Gray Herb.). 
San Luis Potosi: Valley of San Luis Potosi, Aug., 1876, 
Schaffner 277 (Gray Herb. and U. S. Nat. Herb.) ; Valley of 
San Luis Potosi, alt. 1830-2440 m., Parry & Palmer 537 
(Gray Herb., U. S. Nat. Herb., Phil. Acad. Nat. Sci. Herb., 
and Mo. Bot. Gard. Herb.). 
Jalisco: Nevada de Colima, alt. 3050-3650 m., 16 May, 
1893, Pringle 4374 (Gray Herb., U. S. Nat. Herb., and Mo. 
Bot. Gard. Herb.). 
Michoacan: north slope of Mt. Patambau, alt. 2895-3350 
m., 1-4 Feb., 1903, E. W. Nelson 6598 (U. S. Nat. Herb.). 
Mexico: Sierra de las Cruces, 11 Sept. 1892, Pringle 
5261 (Gray Herb.); Nevada de Toluca, 15 Oct., 1903, Rose 
Ф Painter 7901 (Gray Herb.). 
Federal District: Serrania de Ajusco, alt. 3050 m., 16 
April, 1898, Pringle 6812 (Gray Herb., U. S. Nat. Herb., 
Phil. Acad. Nat. Sci. Herb., and Mo. Bot. Gard. Herb.). 
Southern Mexico: “cuesta de las papao pr. Angangueo”’, 
Feb., 1830, Schiede (Berlin Herb., Gray Herb., and U. S. 
Nat. Herb.); wet places on Mt. Ixtaecihuatl, alt. 2740-3050 
m., Nov., 1905, Purpus 1509 (U. S. Nat. Herb. and Mo. Bot. 
Gard. Herb.); Mt. Orizaba, 21 April, 1893, E. W. Nelson 5 
(U. S. Nat. Herb.) ; Mt. Orizaba, alt. 4025-4265 m., 18 March, 
1894, Е. W. Nelson 281 (U. S. Nat. Herb.) ; wet grassy soil 
near timberline, Mt. Orizaba, March, 1908, Purpus 2976 
(U. S. Nat. Herb.); ‘‘Vera Cruz,’’ Galeotti 2183 (Kew 
Herb.) ; at the base of Jacal (Joerl), June, 1839, Ehrenberg 
1294 (Berlin Herb. and Gray Herb.) ; in woods near Guapi- 
