GREEN.MAN. — CENTRAL AMERICAN SPERMATOPHYTES. 37 



inner; pappus white, about 5 mm. in length: achenes slightly puberu- 

 lent: heads of the stamiiiate plant also about 1 cm. high, many (60-70)- 

 flowered ; iuvolucral characters similar to those of the pistillate plant. — 

 Mexico. Federal District : Serrauia de Ajusco, altitude, 2885 m., 7 

 December, 1903, C. G. Pringle, no. 8782 (hb. Gr.). 



Baccharis oaxacana, n. sp. An herbaceous perennial, often stolon- 

 iferous, freely rooting at the suffruticose base: stems erect or ascending, 

 2 to 5 dm. iu height, sparingly branched above, terete, more or less 

 glandular-pubescent : leaves alternate, sessile, obloug-obovate, 2 to 7.5 

 cm. long, 1 to 3 cm. broad, mucronate, shallowly dentate or mucronate- 

 denticulate, narrowed below the middle to a broadly winged subpetiolace 

 auriculate-amplexicaul base, glaudular-hirtellous, paler and somewhat 

 villous-pubescent beneath especially on the midrib and lateral nerves : 

 inflorescence a terminal corymbose cyme ; peduncles short-stipitate- 

 glandular : heads of the pistillate plant about 1 cm. high, many (70-75)- 

 flowered ; involucre campanulate, glandular-puberulent to essentially 

 glabrous; bracts of the involucre unequal, linear-lanceolate, shorter than 

 the flowers, deeply tinged with purple ; flowers either all pistillate or 

 sometimes with a few (2-4) perfect (?) flowers in the centre of the head ; 

 pappus white or slightly tawny, 5 to G mm. long ; achenes glabrous or 

 inconspicuously puberulent : heads of the staminate plant about 8 mm. 

 high, 60-70-flowered, the outer cycle not infrequently consisting of 5 

 pistillate flowers ; iuvolucral bracts sub-4-seriate, narrowly lanceolate, 

 acute, purplish and slightly glandular-puberulent. — Mexico. State of 

 Oaxaca : Sierra de San Felipe, altitude 2895 m., 13 December, 1895, 

 G. G. Pringle, no. 6257 (hb. Gr.), distributed as Baccharis hieracii folia., 

 Hemsl. ; in the same locality, 3 August, 1894, C. G. Pringle, no. 5669 

 (hb. Gr.). 



This species is most nearly related to B. ideraciifolia^ Hemsl., to 

 which Mr. Pringle's specimens were referred bv the writer. A more 

 thorough study in the light of additional material shows very clearly 

 that B. oaxacana differs constantly from B. hieraciifolia in having the 

 leaves sessile oblong-obovate and auriculate-amplexicaul, not ovate- 

 lanceolate and acuminate at both ends. B, oaxacana, as well as the 

 preceding species, B. glandulosa, Green m., may be regarded as some- 

 what intermediate between Conyza and Baccharis, as i\\ey are not dis- 

 tinctly dioecious. The sexes are, however, sutficiently differentiated to 

 warrant both being placed definitely in the genus Baccharis. 



Desmanthodium fruticosum, n. sp. Shrub, 1 to 1.5 m. in height: 

 branches terete, striate, reddish-brown : leaves opposite, ovate, 4 to 8 cm. 



