‘258 PROCEEDINGS OF THE AMERICAN ACADEMY. 
or somewhat atomiferous-glandular with a few scattered spreading stiffish 
hairs intermixed: ray-flowers numerous, 2- (3-) seriate; rays white; 
disk-flowers many: pappus of both ray- and disk-flowers alike, double; 
the inner of slender deciduous setae, the outer of short laciniate squa- 
mellae : mature achenes about 1 mm. long, laterally compressed, pubescent. 
— Mexico. State of Chihuahua: southwestern part of the state, August 
to November, 1885, Dr. Edward Palmer, no. 419 (hb. Gr.) ; dry ledges of 
La Bufa Mt. above Cusihuiriachic, altitude 2375 m., 31 August, 1887, 
_C. G. Pringle, no. 1271 (hb. Gr.); cool slopes, foothills of the Sierra 
Madre, 11 October, 1887, C. G. Pringle, no. 1272 (hb. Gr.); near 
Colonia Garcia in the Sierra Madre, 1-20 August, 1899, EZ. W. Nelson, 
no. 6218 (hb. Gr., and hb. U. S. Nat. Mus.); between Colonia Garcia 
and Pratt’s Ranch below Pacheco, 20-24 August, 1899, Z. W. Nelson, no. 
6265 (hb. Gr., and hb. U. S. Nat. Mus.); near Colonia Garcia in the 
Sierra Madre, altitude 2255 m., 4 September, 1899, Townsend & Barber, 
nos. 305, 306, (hb. Gr.).— Unirep Srares. Arizona: Mt. Graham, 
altitude 2740 m., September, 1874, Dr. J. 7. Rothrock, no. 731 (hb. Gr.) ; 
Ft. Whipple, 1865, Cowes & Palmer, no. 421 (hb. Gr.). 
Forma tenuilobus, n.form. Stems and leaves very sparingly pubes- 
cent; division of the leaf linear, elongated even 3 cm. in length, 2 mm. 
or less in breadth. — Mexico. State of Sinaloa: Sierra de Choix, 
15 October, 1898, H. A. Goldman, no. 255 (hb. Gr., and hb. U. 8: 
Nat. Mus.). 
Forma latilobus, n. form. Stem and leaves copiously glandular- 
puberulent; divisions of the leaf linear-oblong, obtusish, 3 cm. or less 
in length, 2 to 5mm. in breadth, — Mexico. State of Chihuahua: base 
of Mt. Mohinora, 12.8 km. from Guadalupe y Calvo, altitude 2130 to 2 
2285 m., 23-31 August, 1898, EZ. W. Nelson, no. 4861 (hb. Gr, and 
hb. U. S. Nat. Mus.). a 
Var. dactyloides, n. var. Leaves lance-oblong, 2 to 7.5 em. longs 
0.3 to 2.5 em. broad, laciniate-lobed in the upper portion with 3 to i 
slightly divaricating lance-linear acute lobes 12 mm. or less in length, 
the lower two-thirds of the leaf-blade of nearly uniform breadtb, 5 to 12 
mm. broad, entire: rays white or roseate-tinged in the young stage. — : 
Mexico. State of Chihuahua: near Colonia Garcia in the Sierra 
Madre, 1-20 August, 1899, #. W. Nelson, no. 6220 (hb. Gr., and hb. 
.S. Nat. Mus.). The variety connects directly with typical forms of 
the species through Townsend & Barber’s no. 305, and Pringle’s no. 1272, | 
E. oreophilus is closely related to E. delphinifolius, Willd., and 0 
E. neo-mexicanus, Gray, and has been confused with both of these spece* 
