GREENMAN. — SPERMATOPHYTES FROM MEXICO, ETC. 257 



obovate-lanceolate, including the petiole 3 to 10 cm. in length, 0.5 to 2 

 cm. 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 or tinged with magenta, 2-3-dentate: pappus of both ray- 

 and disk-flowers alike, consisting of a single series of numerous slender 

 setae : mature acheues about 1 mm. long, nearly or cpiite glabrous. — 

 Mexico. State of Morelos: wet cliffs, mountain canon 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 cm. 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-rlowers numerous : pappus of both ray- and disk- 

 flowers biseriate ; the outer series of fimbriated scales, the inner of nu- 

 merous slender setae : acheues pubescent. — Mexico. State of Oaxaca : 

 near San Mateo del Mar, 16 May, 1895, E. W. Nelson, no. 2606 (hb. 

 Gr., and hb. U. S. Nat. Mus.). 



Erigeron oreophilus, n. sp. Perennial : stems erect from a ligne- 

 ous base, 3 to 8 dm. high, branched above, green or purplish, striate, 

 glandular-puberuleut and sparingly hirsute with scattered horizontally 

 spreading hairs: leaves mostly pinnatifid, 1.5 to 8 cm. 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 corymbose 

 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-puberuleut 

 vol. xli. — 17 



