178 ON SOIJTH-AMEEICAN APOCTNACEiE. 



glabrous, slender, recurved pedtincle 2 in. long, bearing at the summit a thyrse 2 in. 

 long, consisting of from 8 to 16 opposite flowers on slender pedicels 6-9 lines long, 

 bracteolate at the base ; sepals ovate, acute, 2^ lines long, furnished with several minute 

 internal scales ; tube of corolla 1^ in. long, narrowly cylindrical and contracted in the 

 middle, widening above; segments roundish, 4 lines long; stamens seated in the con- 

 traction of the tube; anthers narrow, with 2 divergent prongs at the base as long as the 

 filaments, acuminate at the summit, pubescent behind, half exserted ; disk 10-striate, 

 unequally divided and subdenticulate on the margin, three fourths the length of the 2 

 oblong glabrous ovaries. 



13. Angadenia ELEGANS, nob. : Echites ekgans, Beuth. in Hook. Journ. Bot. iii. 249; A. DC. /. c. 

 p. 466 : Odontadenia geminata, Miill. (in parte) I. c. p. 119. In Amazona : v. s. in herb. Mus. 

 Brit. Rio Negro (Schomb. 965). 



A climbing plant, with dichotomous slender branches, having dUated axils 1-2^ in. 

 apart ; leaves glabrous, oblong, rounded at the base, sharply acuminate at the summit, 

 chartaceous, margin subrevolute, dark green above, midrib sulcate, with divaricate 

 nerves and closely transverse prominulent veins, fulvous opake beneath, nerves and veins 

 prominent, 2J-3 in. long, 1 in. broad, on slender channelled petioles incrassate at the 

 base, 4 lines long ; racemes axUlary, on slender divaricately dichotomous peduncles 

 9 lines long, eaCh bearing 3-6 flowers, sometimes reduced to 2, on slender pedicels 

 7 lines long; sepals acutely ovate, glabrous, 1^ line long, with submembranaceous 

 margins ; tube of corolla cylindrical, 12 lines long, 1 line broad ; segments broadly dola- 

 briform, shorter than the tube, yellow, red in the mouth ; disk urceolate, fleshy, denti- 

 culate and shortly lO-cleft on the margin, a little shorter than the ovaries. 



14. Angadenia geminata, nob. : Echites geminata, R. & Sch. Syst. iv. 795 ; A. DC. I. c. p. 475 : Odon- 



tadenia geminata, Miill. (in parte) I. c. p. 119. In Brasilia : v. s. in herb, meo et alior. San Carlos, 

 Rio Negro (Spruce 3152). 



A species distinctly described by Romer and Schultz, and different from the preceding, 

 varying from it in its broader ovate leaves shortly acuminate but not mucronate at 

 the apex, undulated on the margin, with more nerves. It has very slender flexuose 

 branches, with axils, not dilated, about 2| in. apart ; leaves divaricate or reflexed, 

 oblong-ovate, rounded at the base, suddenly and shortly acuminate, margin cartila- 

 ginous, crenately undulate, green above, with a slender midrib and numerous close, 

 subpatent, thin prominulent nerves, with transversely reticulated veins, yellowish opake 

 beneath, with prominent nerves and veins, 2^-31 in, long, l^lf in. broad, on slender 

 petioles little incrassate at the base, 5 lines long; racemes opposite, on compressed 

 peduncles bare at the base for 1 in., each bearing above 6 flowers in 3 geminate pairs 

 4-6 Unes apart, on slender pedicels 10 lines, the upper ones 6 lines long; sepals as 

 in the preceding ; tube of the coroUa slender, a little swoUen in the mouth, 13 lines 

 long ; segments broadly dolabriform, 9 lines long and broad ; stamens seated in the 

 middle of the tube ; anthers with 2 basal prongs, somewhat divergent ; disk as in the 

 preceding species. 



