New Species of South American Plants 33 



others but little shorter, the filaments thickish, the anthers 

 broadly oval. Pistil 4.5 mm. long, the styles about as long as 

 the oval ovary, stout, the stigmas double. Capsule not pres- 

 ent. 



"In an uncultivated field at La Paz, 3,750 meters altitude, 

 ■January 13, 1907." (Otto Buchtien, No. 618.) No. 3197 

 from 200 meters lower, is probably the same. 



Erythroxylon densum. 



Glabrous, the branchlets short and very stout, terete, gray 

 and rough, very leafy. Stipules small, ovate, mostly broader 

 than long, mucronate, thick, more or less keeled. Petioles 3 

 to 6 mm. long, red, stout, margined with the margins involute, 

 keeled. Blades 3 to 7 cm. long, 2 to 5 cm. broad, thick, drying 

 brown, oblong or oval, obtuse or acutish at the base and at the 

 summit blunt, mostly with a minute apiculation, the midrib 

 channelled above, prominent and rounded beneath, the coarsely 

 reticulate slender venation lightly prominent on both surfaces, 

 the secondaries very crooked. Flowers densely aggregated at 

 the nodes, the pedicels very short, nearly as broad as long. 

 Calyx 3 mm. broad, the sepals i mm. long, ovate, obtuse, thick 

 and coriaceous. Petals 3 mm. long, erect, ovate, obtuse, bluntly 

 keeled at the base, thick, minutely puberulent. 



Ligule attached nearly at the base of the petal, and half 

 its length, the lower portion very thick, brown, the upper 

 hyaline and bifid. Stamen-tube crateriform, short, the glands 

 wanting or obscure. Ovary ovoid, about twice the length of 

 the calyx, lo-striate, two-thirds as long as the tortuous styles, 

 which are slightly connate at the base, the stigmas capitate, 

 rather large. 



"A tree to 25 feet, occasional in thickets on mountain 

 ridges, 2500 to 4500 feet. Flowers white, in March, the flower- 

 ing branchlets often leafless. Collected 6 miles N. E. of Ma- 

 singa, 2500 feet, March 28." (Herbert H. Smith, Colombia, No. 

 845.) Species near E.revolutum. May be the same as Schomb, 

 Guiana, 925. 



Erythroxylon uniflorum. 



Glabrous, the branchlets slender, flexuous, terete, bearing 

 laige leaf-scars. Stipules ovate, acute, early deciduous. Peti- 

 oles 3 or 4 mm. long, slender, narrowly margined, the margins 

 involute. Blades 3 to 8 cm. long, 2 to 5 cm. broad, oval with 

 rounded base and rnostly obtuse summit, thick, the midrib 

 narrowly depressed above, rounded and prominent beneath, 

 the finely and strongly anastomosing venation prominent on 

 both surfaces, the crooked secondaries irregularly anastomosing. 



