50 New Species of South Amebican Plants 



narrowly margined except at the base. Blades about i dm. 

 long, 4 or 5 cm. broad, oval with the base very abruptly con- 

 tracted into the petiole and with abruptly very short-acuminate 

 and acute summit, thick and coriaceous, somewhat shining 

 above,_ the venation slender, lightly prominent on both sides, 

 the principal secondaries about 7 on each side, crookedly inter- 

 arching near the margin, the venation coarsely reticulate. 

 Capsule 12 to 14 mm. long, externally light-brown, muricate 

 and pitted where the trichomes have disarticulated, the valves 

 thick and woody, within light brown and shining. Seed not 

 seen. A low tree. 



Near Ingles-Ingles, Bolivia, 6000 feet, August 8, 1902. (R. 

 S. Williams, No. 1576.) 



Sebastiania (Microstachys) Boliviana. 



Gray-pubescent throughout, the hairs of the stem divergent 

 or slightly reflexed. Stems much-branched, the branches very 

 slender, recurved. Stipules obsolete. Petioles i to nearly 2 

 mm. long, stout. Blades mostly i to 2 cm. long, 3 to 6 mm. 

 broad, lance-ovate with rounded base and obtuse or acutish 

 summit, sparsely serrulate, thickish, the midrib broad, the 

 secondaries about 6 on each side, widely spreading, crooked, 

 connecting at some distance from the margin, the remaining 

 venation obscure. Staminate spikes terminal and opposite 

 the leaves, short peduncled or sessile, to 2.5 cm. long, about i 

 mm. thick, the flowers not crowded, the pistillate flowers one 

 or two at the base. Staminate flowers sessile, the bracts ovate, 

 acute. Pistillate flowers sub-sessile, the styles stout, strongly 

 recurved. Capsule 4 mm. long, the valves bearing a vertical 

 row of three or more black, conical, acutish tubercles along the 

 middle. Seed nearly 3 mm. long, oblong or oval, black, smooth, 

 one end depressed and bearing a whitish stipitate membran- 

 aceous, circular discoid appendage with dentate margin. 



"Four feet high, at Tumapasa, Bolivia, 1,800 feet, Decem- 

 ber 7, 1901." (R. S. Williams, No. 353.) 



Euphorbia (Anisophyllum) sanmartensis. 



Grayish-puberulent throughout. Stems elongated, slender, 

 green, finely nerved, flexuous, prostrate or ascending, the 

 branches similar. Stipules minute or obsolete. Petioles 1.5 

 mm. long and nearly as broad. Leaves opposite, those of the 

 pair equal or sub-equal, the blades 6 to 12 mm. long and two- 

 thirds or more as broad, inequilaterally 'oval with lightly cordate 

 base and broad rounded summit, entire or obsoletely serrulate, 

 slightly revolute, thickish, pale, densely pellucid-punctate, 3 (or 

 occasionally 4 or 5) nerved, the venation obscure, mostly erect 

 or strongly ascending. Involucres very shortly and stoutly 



