[Vor. 5 
64 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
to 10 em. long, .5 to 2.5 em. broad; heads usually solitary, 
rarely two, 1.5 to 2 em. high, radiate; involuere campanulate, 
calyculate; bracts of the involuere about 21, linear-lanceolate, 
10 to 13 mm. long; ray-flowers 9 to 13, rays pale yellow; disk- 
flowers numerous; achenes pubescent. 
Distribution: southwestern United States and northern 
Mexico. 
Specimens examined: 
Arizona: Flagstaff, 7 June, 1883, Rusby 671 (Gray Herb., 
U. S. Nat. Herb., Phil. Acad. Nat. Sci. Herb., and Mo. Bot. 
Gard. Herb.), түре; without definite locality, coll. of 1869, E. 
Palmer (Kew Herb. and U. S. Nat. Herb.); San Francisco 
Mountains, Aug., 1884, Lemmon 3265 (Gray Herb. and U. S. 
Nat. Herb.); Baker's Butte, 2 June, 1890, Jones (U. S. Nat. 
Herb. and Mo. Bot. Gard. Herb.) ; Willow Spring, 10-20 June, 
1890, E. Palmer 488 (Gray Herb., Kew Herb., and U. S. Nat. 
Herb.) ; Flagstaff, З July, 1892, Wooton (U. S. Nat. Herb.) ; 
Belmont, 29 June, 1892, Тоитеу 600 (Gray Herb.) ; Belmont, 
29 June, 1892, Тоитеу 600a (U. S. Nat. Herb.) ; San Fran- 
cisco Mountains, 14 July, 1892, Towmey 600b (U. S. Nat. 
Herb.) ; vicinity of Flagstaff, alt. 1675 m., 31 May, 1898, Mac- 
Dougal 5 (Gray Herb., U. S. Nat. Herb., Phil. Acad. Nat. Sci. 
Herb., and Univ. Ariz. Herb.) ; base of San Francisco Moun- 
tains, southwest side, 3 June, 1901, Ward (U. S. Nat. Herb.) ; 
near Flagstaff, alt. 1900 m., coll. of 1901, Leiberg 5533 (U. S. 
Nat. Herb.); Fort Valley, Coconino National Forest and 
vicinity, 14 June, 1909, Pearson 174 (U. S. Nat. Herb.) ; open 
flats, Cooley's Ranch, 1 July, 1912, Goodding 1104 (U. S. Nat. 
Herb.). 
Chihuahua: near Colonia Garcia in the Sierra Madre, alt. 
2285 m., 9 June, 1899, Townsend & Barber 25 (Gray Herb., U. 
5. Nat. Herb., and Mo. Bot. Gard. Herb.) ; vicinity of Madera, 
alt. about 2250 m., 27 May-3 June, 1908, E. Palmer 282 (U. S. 
Nat. Herb. and Mo. Bot. Gard. Herb.). 
Durango: Quebrada Honda, 20 and 21 May, 1906, E. Palmer 
212 (Gray Herb., U. S. Nat. Herb., and Mo. Bot. Gard. Herb.), 
and 218 (Gray Herb. and U. S. Nat. Herb.). 
Var. mogollonicus (Greene) Greenm. comb. nov. 
