18 New Species of South Ameeican Plants 



about half as large and with rounded base, and the fruits are 

 only about half as large, with narrower margin. No. 6i6 is 

 the type. 



Hyperbaena trinervis. 



Glabrous except for the minutely puberulent inflorescence. 

 Branches stout, terete, the internodes elongated. Petioles 2 to 

 3 cm. long, slender, nerved, enlarged above, where they bear a 

 pair of large glands. Blades 8 to 12 cm. long, 3 to 5 cm. broad, 

 lance-oblong, mostly slightly inequilateral, rounded at the base, 

 abruptly short-acuminate and obtuse at the summit, entire, 

 thick and coriaceous, somewhat lucid, the midrib impressed 

 above, strongly prominent underneath, as are the secondaries, 

 the venation slightly prominent on both surfaces. Basal pair 

 of secondaries forming sub-marginal nerves extending about 

 half the length of the leaf, the other secondaries 2 or 3 on each 

 side, the secondaries and midrib connected by numerous straight- 

 ish tertiaries. Racemes paniculately disposed, mostly 3 to 6 

 cm. long, slender, the very small flowers crowded in short ra- 

 cemes which are loosely distributed along the rachis. Bracts 

 very small, subulate, the flowers very shortly and stoutly 

 pedicelled. Flowers not exceeding i mm. in breadth. Outer 

 sepals minute, apparently 6, the three outer smaller. Inner 

 sepals obovate, five times the length of the outer. Petals 6, 

 spatulate with rounded summits, minute. 



"San Antonio, Mapiri, Bolivia, 870 M. December, 1907, 

 (Buchtien, No. 1935.) 



Duguetia pauciflora. 



Glabrous, except for the tomentose calyx. Branchlets 

 slender, terete. Petioles very short, margined, the blades 

 15 to 25 cm. long, 5 to 8 cm. broad, oblong or oval with rounded 

 or blunt base and abruptly very short acuminate summit, entire, 

 thin, slightly shining above, where the midrib is narrowly 

 grooved, the very slender venation prominent underneath, the 

 principal secondaries about 12 on each side, widely spreading, 

 lightly falcate and lightly anastomosing near the margin. 

 Flowers several, borne distantly in a slender terminal raceme. 

 Pedicels very short and stout, subtended by a small, very thick 

 triangular-ovate bract. Flowers about 12 mm. long, 15 mm. 

 broad. Sepals 3, two-thirds the length of the petals, broadly 

 ovate, erect, thick, tomentose. Petals 6, sub-equal, pubescent 

 without, the inner a little longer and narrower, their summits 

 inflexed. Stamens very short, the anthers margined, broadened 

 upward and tipped by a short, broad, lighter colored, truncate 

 extension of the connective. Carpels about 15, seen only in a 

 very young state, sessile, pubescent, appearing as though they 



