New Species of South Amehican Plants 65 



mit, reticulate-veined. Body of ovary broadly oval, 5 mm. 

 long, half as broad as the larger wing, which is nearly at a right 

 angle, and ovate with rounded summit. Styles 6, distinct, 

 bifid nearly to the base, the branches again bifid and each branch 

 bearing two or three capitate stigmas. Body of capsule 12 mm. 

 long, broadly oval, the smaller wiijg narrow, little broadened 

 upward,_very veiny, the larger 3 cm. long, slightly ascending, 

 ovate with rounded summit, the upper margin nearly straight, 

 the lower slightly descending with regular curve near the base, 

 strongly nerved, the nerves branching, the branches erect, 

 crooked. 



The type is the pistillate plant, collected by H. H. Rusby 

 at Unduavi, Bolivia, 8000 feet, October 1885 (No. 677). The 

 staminate plant is unique, collected by Mr. Bang in Bolivia, 

 without number or data. 

 Begonia lignosa. 



Younger portions and veins of lower leaf-surfaces pilose, 

 and upper leaf-surfaces lepidote. Stems stout, somewhat 

 woody, purple-brown, many-sulcate, the branchlets short and 

 strongly ascending. Stipules about 2 cm. long, lance-ovate, 

 acuminate and acute, the tips attenuate, scarious, brown, 3- 

 nerved. Petioles i to 2 cm. long, broadly channelled above, 

 sparsely ciliate. Midrib of blades 4 to 6 cm. long, the blade 

 2 to 3 cm. wide, obliquely ovate, the base on one side descending 

 to form a broad rounded auricle, the summit acute, the margins 

 doubly serrate, the teeth ciliate, several strong, straight nerves 

 radiating from the summit of the petiole and extending to the 

 margin, the venation prominent underneath, very pilose, the 

 hairs coarse and somewhat ferruginous. Cyme long and slen- 

 derly peduncled, widely and loosely branched, several-bracted 

 at the points of branching, the bracts a little smaller than the 

 stipules. Flowers very shortly pedicelled. Three inner petals 

 larger, nearly i cm. long, broadly oval with rounded summits, 

 thickish. Ovary 6 mm. long and about 8 mm. broad, winged. 

 Styles 6, separate nearly or quite to the base, very stout, tough, 

 flattened like their numerous lobes, which terminate in large 

 capitate stigmas. 



Capsule oval, i cm. long and nearly as broad, one wing only 

 2 mm. wide, the other two cm. wide and 13 mm. high, ovate, 

 with rounded summit, its nerves nearly straight and parallel, 

 the extremity only slightly higher than the top of the capsule. 



Unduavi, South Yungas, Bolivia, Nov. 1910. (Otto Buch- 

 tien. No. 2899.) 

 Begonia oblanceolata. 



Margins of leaves and stipules strongly ciliate, the upper 

 leaf-surfaces green and lepidote, the lower brown, very minutely 



