GREENMAN. — SPERMATOPHYTES FROM MEXICO, ETC, 257 
obovate-lanceolate, including the petiole 8 to 10 cm. in length, 0.5 to 2 
em. broad, acuminate, acute, remotely and rather coarsely mucronate- 
dentate, gradually narrowed at the base into the slender petiole, dark 
green and pubescent above with scattered hirsute hairs, paler and glab- 
rous beneath; petioles reddish-purple, usually as long as or sometimes 
exceeding the blade: heads 6 to 8 mm. high, including the rays 1.5 to 
2 cm. in diameter: involucre campanulate, about as high as the flowers of 
the disk ; bracts of the involucre 2—3-seriate, subequal, lanceolate, acute, 
pubescent with a few jointed hairs: ray-flowers 60 to 70, in 2 series; 
rays white gr tinged with magenta, 2-3-dentate: pappus of both ray- 
and disk-flowers alike, consisting of a single series of numerous slender 
setae: mature achenes about 1 mm. long, nearly or quite glabrous. — 
Mexico. State of Morelos: wet cliffs, mountain cafion near Cuerna- 
vaca, altitude 1980 m., 15 May, 1898, C. G. Pringle, no. 7668 (hb. Gr.). 
Erigeron oaxacanus, n. sp. A low herbaceous perennial: stems 
several from a common base, ascending or suberect, simple or branched, 
about 1 dm. high, hirsute-pubescent : leaves oblanceolate to lance-linear, 
0.5 to 1.5 em. long, 1 to 4 mm. broad, incised-serrate with 3 to 7 teeth 
to entire, subappressed-hirsute-pubescent on both surfaces; the lower- 
most leaves narrowed to a subpetiolate base, the upper sessile: peduncles 
terminating the stems and branches, 4 cm. or less in length, slender, 
pubescent: heads excluding the rays 6 to 8 mm. in diameter: involucre 
campanulate; bracts of the involucre narrowly lance-attenuate, hirsute- 
pubescent: ray-flowers 2-3-seriate, 80 to 85; rays white, twice as long 
as the involucre: disk-flowers numerous: pappus of both ray- and disk- 
flowers biseriate ; the outer series of fimbriated scales, the inner of nu- 
merous slender setae: achenes pubescent.— Mexico. State of Oaxaca: 
near San Mateo del sno 16 esas 1895, #. W. Nelson, no. 2606 (hb. 
Gr., and hb. U. S. Nat. : 
Riioercé bina n. sp. Perennial: stems erect from a ligne- 
ous base, 3 to 8 dm. high, branched above, green or purplish, striate, 
glandular-puberalent and sparingly hirsute with scattered horizontally 
Spreading hairs: leaves mostly pinnatifid, 1.5 to 8 em. long, 4 cm. or 
less broad, glandular-puberulent and sparingly hirsute ; divisions linear or 
linear-oblong, acute or obtuse, entire ; the broad petiole-like base of the 
leaves usually rather conspicuously ciliate; the uppermost leaves undi- 
vided, linear-lanceolate and entire: inflorescence a terminal corym 
cyme: heads including the rays 2.5 to 3 cm. in diameter: involucre cam- 
panulate, about 6 mm. high; bracts of the involucre linear, attenuate, 
Somewhat scarious-tipped and more or less purplish, glandular-puberulent 
VOL. x1. —17 
