GREENMAN. — SPERMATOPHYTES FROM MEXICO, ETC. 259 



From the former it differs iu having horizontally spreading hirsute hairs 

 on the stems, and in being glaudular-puberulent; from the latter it 

 differs in being glandular-puberulent or at least atomiferous-glandular, 

 and in having heads averaging fully one-third larger not only in the 

 length of the ray-flowers but in the longer involucral bracts, etc. 



Erigeron repens, Gray, var. psammophilus, n. var. Stem slen- 

 der, somewhat flexuous, sparingly pubescent : leaves glabrous or incon- 

 spicuously pubescent : other characters of the species. — Mexico. State 

 of Vera Cruz: Lizardo, Dr. Wawra, no. 276 (hb. Berlin, and lib. Gr.). 

 Mr. C. G. Pringle's no. 9G73 collected on sand dunes near the City of 

 Vera Cruz, and noted in the Proceedings of the American Academy 

 xxxix, 95, 1903, forms a good intermediate between the type of the above 

 species and the variety here described. 



Baccharis Palmeri, n. sp. Suffruticose : stems one to several from 

 a ligneous base, erect, 2 to 3 dm. high, striate-angled or furrowed, glab- 

 rous, glandular-viscid : leaves sessile, lanceolate to oblanceolate, 7 to 28 

 mm. long, 1 to 8 mm. broad, acute, entire, glabrous, punctate and glan- 

 dular-viscid, uninerviate or with 2 lateral inconspicuous nerves : inflores- 

 cence corymbose or corymbose-paniculate : heads 3 to 5 at the ends of the 

 branches on rather short peduncles : heads of the stamiuate flowers 8 to 10 

 mm. high, 11-13-flowered ; involucral bracts in 3 to 4 series, lanceolate. 

 3 to 7 mm. long, acute, the outer greenish glandular and shorter than the 

 inner almost colorless ones: heads of the pistillate flowers 1 to 1 .5 cm. high, 

 15— 18-flowered ; bracts of the narrowly campanulate involucre 3-4-seriate, 

 elliptic-lanceolate to lanceolate, 2 to 6 mm. long, the outer greenish, 

 glandular-viscid, obtuse and shorter than the pale almost colorless or sub- 

 hyaline inner acute ones : mature achenes 2 mm. long, striate, glabrous, 

 bearing the rather persistent pappus, the latter 10 to 12 mm. in length. — 

 Mexico. State of Durango : vicinity of the city of Durango, April to 

 November, 1896, Dr. Edward Palmer, no. 801 (bb. Gr., and hb. Berlin) 

 staminate plant, and no. 802 (hb. Gr.) pistillate plant. The species is 

 related to B. Seemanni, Gray, which it superficially resembles, but differs 

 in having shorter peduncles, more numerous heads, and a fewer-seriated 

 involucre. 



Baccharis Pringlei, n. sp. Stem striate, purplish, pubescent with 

 crisp hairs ; internodes 5 to 6 cm. in length : leaves alternate, sessile, 

 ovate, acuminate, 4 to 12 cm. long, 2 to 5.5 cm. broad, abruptly nar- 

 rowed below the middle to about 1.5 cm. in breadth, amplexicaul, mu- 

 cronate-acute, subsinuate-dentate and the teeth terminated by a mucro, 

 ciliate, hirsute-pubescent above, paler and pubescent on the midrib and 



