64 New Species of South American Plants 



total length; entire, thickish, deep-green, pellucid-punctate, 

 the venation prominent beneath, lightly so above, the secon- 

 daries 7 or 8 on each side with several lesser intermediates, 

 strongly falcate-ascending, obscurely connecting near the mar- 

 gin, the venation finely and strongly anastomosing. Fascicles, 

 nearly circular as pressed, lo or 12 mm. broad, densely many 

 flowered. Pedicels about 3 mm. long, mostly 3 together, with 

 their bases enclosed in three minute, hyaline, broadly oval 

 obtuse scales. Sepals 2 mm. long and broad, sub-rotund, 

 thickish, white with purple spots on the inner surface, minutely 

 cihate, connate at the base. Stamens 10, adnate to the base 

 of the calyx, distinct, nearly as long as the sepals, the filaments, 

 stout, pilose, the anthers small, as broad or broader than long. 

 Stammodia broad, half as long as the stamens. Pistil equaling 

 the stamens, the ovary broadly ovoid, the style slender, the 

 stigmas large, on short style-branches. 



"A tree, 15 to 20 feet, in dry forests and thickets near Minca, 

 2000 feet, July 5. Dots on leaves, much more apparent than 

 in 416 and branchlets smooth." (Herbert H. Smith, Colombia, 

 No. 1768.) 



Begonia Unduavensis. 



Sparsely pilose. Stems slender, widely branching, apparently 

 reclining or decumbent, sharply costate and deeply sulcate. 

 Stipules 1.5 cm. long, ovate, acuminate, brown, scarious, with a 

 strong midrib. Petioles about 2 cm. long, slender and weak, 

 the blades thin, 3 to 7 cm. long, from the summit of the petiole,, 

 the rounded base on one side descending about i cm. lower,, 

 ovate, slenderly acuminate and acute, highly inequilateral, the 

 margin of the smaller side forming an almost regularly con- 

 tinuous curve with the base of the other, and much less serrate 

 than the other side, which is coarsely serrate-dentate, the teeth' 

 very finely serrate, all the teeth acute, the larger side with two 

 ribs starting from the base and one from the midrib near the 

 base. Cyme few flowered, the branches slender, mostly elon- 

 gated and spreading laterally, the bracts 5 or 6 mm. long, scari- 

 ous, brown, oblong or oval, blunt or minutely mucronate. Pedi- 

 cels 1.5 cm. long in flower, twice as long in fruit, slender. 



Staminate flowers: Perigone segments 2, unequal, the larger 

 more than i cm. long, nearly 2 cm. broad, the margin rounded, 

 the smaller about two-thirds as large. Stamens very numerous, 

 distinct, 4 mm.l ong, very slender, the filament a little longer than 

 the anther, which is oblong-lanceolate, the connective dark- 

 brown and continued into a rounded, thick appendage nearly 

 as broad as the anther. 



Pistillate flowers: Perigone segments 6, similar and equals 

 12-15 rnin- lo^g ^"d half as broad, obovate with rounded sum- 



