258 PROCEEDINGS OP 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- 

 ruellae : mature achenes about 1 mm. long, laterally compressed, pubescent. 

 — Mexico. State of Chihuahua : southwestern part of the state, August 

 to November, 1885, Br. 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, E. 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, E. 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, Toionsend S? Barber, 

 nos. 305, 306, (hb. Gr.). — United States. Arizona : Mt. Graham, 

 altitude 2740 m., September, 1874, Br. J. T. Rothrock, no. 731 (hb. Gr.) ; 

 Ft. Whipple, 1865, Cones & Palmer, no. 421 (hb. Gr.). 



Forma tenuilobus, n. form. Stems aud 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, E. A. Goldman, no. 255 (hb. Gr., and hb. U. S. 

 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 5 mm. in breadth. — Mexico. State of Chihuahua: base 

 of Mt. Mohinora, 12.8 km. from Guadalupe y Calvo, altitude 2130 to 

 2285 m., 23-31 August, 1898, E. W. Nelson, no. 4861 (hb. Gr., and 

 hb. U. S. Nat. Mus.). 



Var. dactyloides, n. var. Leaves lance-oblong, 2 to 7.5 cm. long, 

 0.3 to 2.5 cm. broad, laciniate-lobed in the upper portion with 3 to 7 

 slightly divaricating lance-linear acute lobes 12 mm. or less in length, 

 the lower two-thirds of the leaf-blade of nearly uniform breadth, 5 to 12 

 mm. broad, entire : fays white or roseate-tinged in the young stage. — 

 Mexico. State of Chihuahua: near Colonia Garcia in the Sierra 

 Madre, 1-20 August, 1899, E. W. Nelson, no. 6220 (hb. Gr., and hb. 

 U. S. Nat. Mus.). The variety connects directly with typical forms of 

 the species through Townsend & Barber's no. 305, and Pringle's no. 1 272. 



E. oreophllus is closely related to E. delphinifolius, Willd., and to 

 E. neo-mexicanus, Gray, and has been confused with both of these species. 



