New Species of South American Plants 87 



ovaries. Stigma conical, about 3 mm. long and broad, the 

 base reflexed, 5-lobed, the tips of. the lobes whitish. Corolla- 

 tube cyHndrical, i cm. long, the remainder 2.5 cm. long and 

 broadly campanulate. Stamens attached to a densely pilose 

 ring at the summit of the tube, without scales, the filaments 

 very short, the anthers 6 or 7 mm. long, short-acuminate but not 

 acute, the basal lobes almost wholly adnate and obtusish. 



"A twining vine to 20 feet, rare in damp forest and neglected 

 clearings. Sierra del Libano, 6,000 feet. Corolla white, 

 greenish on the outside. Collected January 22." (Herbert 

 H. Smith, Colombia, No. 1904.) 



Dipladenia Buchtienii. 



Finely and softly puberulent throughout, the stem rather 

 stout, erect, terete, striate, in my specimen 3 dm. high, the very 

 short hairs divaricate or slightly reflexed, the leaves approxi- 

 mate, subsessile, 4 or 5 cm. long, the lower nearly as broad, the 

 upper about half as broad, oblong or oval with sub-cordate 

 base and broad, very slightly pointed summit, ttiickish, the 

 venation obscure, the secondaries 8 or 10 on each side, stoutish, 

 ascending and strongly upcurved in the outer third. Flowers 

 (5 in my specimen), approximate, the stout pedicels 6 to 10 mm. 

 long, upwardly thickened, nerved, the bracts about half the 

 length of the pedicel, thin with a thick midrib, brown, ovate, 

 mucronulate. Calyx 6 mm. long, parted to the base, pilose 

 within at the base, the lobes ovate, acuminate, thin, brown. 

 Corolla-tube 8 mm. long, 3 mm. wide, 15-nerved, the nerves 

 grouped in three's, the throat 2.5 cm. long, narrowly campanu- 

 late, the limb 2.5 or 3 cm. broad. Inner scales of the calyx 

 very small and short, the disk-lobes narrow, about half the length 

 of the ovaries. 



"Polo-Polo, near Coroico, Bolivia, iioo M. altitude, Novem- 

 ber II, 1912." (Otto Buchtien, part of No. 3903, the other 

 portions being D. tetradenia Rusby. 



Dipladenia piladenia. 



Puberulent throughout, the stem slender, branching from 

 the base, in my specimen half a meter high, terete, striate, the 

 brownish short hairs strictly divaricate. Lower leaves rudi- 

 mentary, relatively broader than the upper, the middle leaves 

 largest. Petioles extremely short, the blades 5 to 10 cm. long, 

 1.5 to 3 cm. broad, lanceolate with rounded base and abruptly 

 very short-pointed summit, the point rather broad; thickish, 

 drying brownish, softly and very shortly puberulent on both 

 surfaces, the venation inconspicuous, the principal secondaries 

 about 15 on each side, very slender, ascending and but little 

 curved. Flowers few (3 in my specimen), distant, the pedicels 



