240 PROCEEDINGS OF THE AMERICAN ACADEMY. 



ranca near Cuernavaca, altitude 1525 m., 17 June, 1904, C. G. Pringle, 



no. 8819 (hb. Gr.). 



The species here proposed has its nearest affinity with A. Iteterantha, 

 Muell. Arg., but differs in leaf-outline, the more divergent lateral nerves 

 of the leaves, the ovate petals, and in the densely pubescent ovary. 



Euphorbia, campestris, Cham. & Schlecht., var. subpuberula, 

 n. var. Steins 3 to 6 dm. high, glabrous below, puberulent above : leaves 

 lanceolate to lance-ovate, 1 to 3.5 cm. long, 3 to 14 mm. broad; leaves 

 and bracts of the inflorescence ovate and mucronate-acute. — Mexico. 

 State of Hidalgo : wet banks of river below Trinidad Iron Works, alti- 

 tude 1740 m., 25 April, 1904, C. G. Pringle, no. 8906 (hb. Gr.). Dis- 

 tinguished from the species by the puberulence of the upper part of the 

 stem and floral branches, by the less crowded and broader lanceolate to 

 lance-ovate leaves, and by the more ovate or less rotund leaves and bracts 

 of the inflorescence. 



Clethra Alcoceri, n. sp. A small tree ; ultimate branchlets terete 

 or subangled, striate, densely covered with a close fine reddish brown 

 stellate tomentum : leaves petiolate, elliptic-lanceolate to oblong-obovate, 

 7 to 14 cm. long, 3 to 6 cm. broad, obtuse to short-acuminate and sub- 

 mucronate-acute, shallowly sinuate-dentate to merely denticulate, slightly 

 unsymmetrical at the base, dark green above, paler beneath, minutely 

 stellate-puberulent on both surfaces ; midrib and lateral nerves prominent 

 beneath; petioles 1 to 1.5 cm. long, rather densely stellate-pubescent: 

 inflorescence terminal, consisting of paniculately disposed racemes, the 

 latter 1 to 2 dm. in length ; rhachis striate, densely tawny stellate- 

 tomentose ; pedicels 2 to 3 mm. long, about equalling the caducous 

 bracts : flowers 5 to 6 mm. high, equally broad : calyx about two-thirds 

 as long as the corolla ; divisions of the calyx ovate, obtuse, closely stel- 

 late-pubescent on both surfaces : petals white, obovate or obovate-oblong 

 with thin subfimbriate margins: stamens included; filaments glabrous : 

 ovary densely pubescent with silvery white stellate or branched hairs : 

 mature fruit not seen. — Mexico. State of Hidalgo : barranca near 

 Trinidad Iron Works, altitude 1600 m., 22 August, 1904, C. G, Pringle, 

 no. 8923 (hb. Gr.). The species is dedicated to Sefior Dr. Gabriel 

 Alcocer of the National Medical Institute, City of Mexico. 



Halenia chlorantha, n. sp.' Annual, glabrous throughout : stems 

 erect, 4 dm. or more high, simple below, branched above, narrowly 

 winged : leaves ovate to lanceolate, including the petiole 3 to 6 cm. long, 

 0.5 to 1.8 cm. broad, acute, entire, somewhat gradually narrowed below 

 into the petiole, 3- (5-) nerved ; petioles of the lower leaves about 



