110 PROCEEDINGS OF THE AMERICAN ACADEMY, 
yellow, 8 mm. long, one-half as broad, longer than the slender sterile 
achene: disk-flowers numerous, about 50; corollas pale yellow or some- 
times slightly tinged with purple: mature achenes 5 mm. long, 3 mm. 
broad. — Mexico. State of Jalisco: fields and copses, Tequila, Septem- 
ber—October, 1893, O. G. Pringle, no. 4602 (hb. Gr.). State of Guerrero: 
between Tlapa and Tlaliscatilla, altitude 1200 to 1400 m., 5 December, 
1894, EB. W. Nelson, no. 2045 (hb. Gr., and hb. U.S. Nat. Mus.). State 
of Oaxaca: hills of Soledad de Etla, altitude 1850 m., 19 November, 
1895, L. O. Smith, no. 894 (hb. Gr.). 
_ This species has hitherto been confused with Encelia mexicana, Mart., 
and Mr. Pringle’s specimen above cited was distributed as “ Encelia 
mexicana, Mart., var.” From that species, however, EH. adenophora is 
amply distinct, being readily separated by the pale yellow color of the 
entire plant, the larger, more numerously flowered heads, the attenuated 
involucral scales, and finally by the copious stipitate-glandular hairs of 
stem, leaves and inflorescence. 
Encelia angustifolia. An herbaceous perennial: stem simple, erect 
from a ligneous base, 3 to 4 dm. high, glabrous, striate, more or less 
purplish : leaves alternate or scattered, linear or linear-lanceolate, 1.5 to 8 
em. long, 1.5 to 3 mm. broad, acute or acutish, remotely and inconspicu- 
ously serrulate, appressed-hirtellous above, glabrous beneath, 3-nerved ; 
nerves rather prominent especially on the lower leaf-surface: heads 
radiate, about 1 cm. high, excluding the rays about 6 mm. in diameter, 
terminating the stems on slender peduncles: involucre 1—2-seriate ; 
bracts of the involucre lance-linear, subequal, shorter than the flowers of 
the disk : ray-flowers about 5; rays narrowly oblong, 10 to 12 mm. long, 
yellow: disk-flowers comparatively few: achenes strongly compressed 
laterally, ciliate-margined.— Mexico. Territory of Tepic: in the 
Sierra Madre, 13 August, 1897, Dr. J: NV. Rose, no. 3453 (hb. Gr., and 
hb. U. S. Nat. Mus.). 
A very characteristic species, which on account of the narrow attenu- 
ated leaves and the few heads, is easily distinguished from all the de- 
scribed species of the genus. 
Encelia collodes. Suffruticose: stem covered with a brownish bark: 
branches striate, or striate-angled puberulent or essentially glabrous: 
leaves alternate, petiolate, lanceolate or oblong-lanceolate, 5 to 12 cm. 
long, 1.5 to 5 cm. broad, acuminate, acute, entire, narrowed at the base 
into a 0.5 to 1.5 em. long petiole, glabrous above, puberulent on the 
prominent midrib and nerves beneath, firm in texture: inflorescence @ 
terminal few-headed subcorymbose cyme: heads rather large, -pedun- 
