178 ON SOUTH-AMERICAN APOCYNACEX. 
glabrous, slender, recurved peduncle 2 in.long, bearing at the summit a thyrse 2 in. 
long, consisting of from 8 to 15 opposite flowers on slender pedicels 6-9 lines long, 
bracteolate at the base; sepals ovate, acute, 23 lines long, furnished with several minute 
internal scales ; tube of corolla 13 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 elegans, Benth. in Hook. Journ. Bot. iii. 249; A. DC. Le 
p. 466: Odontadenia geminata, Müll. (in parte) l. c. p. 119. In Amazona: v. s. in herb. Mus. 
Brit. Rio Negro (Schomb. 965). 
A climbing plant, with dichotomous slender branches, having dilated axils 1-23 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, 24-3 in. long, 1 in. broad, on slender channelled petioles incrassate at the 
base, 4 lines long; racemes axillary, 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, 13 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- 
eulate and shortly 10-cleft on the margin, a little shorter than the ovaries. 
14. ANGADENIA GEMINATA, nob.: Echites geminata, R. & Sch. Syst. iv. 795; A. DC. l c. p. 475 : Odon- 
tadenia geminata, Müll. (in parte) J. c. p. 119. 
In Brasilia: v. s. in herb. meo et alior. San Carlos, 
Rio Negro (Spruce 3152). 
A species distinctly described by Rómer 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 24 in. apart; leaves divaricate or reflexed, 
oblong-ovate, rounded at the base, suddenly and shortly acuminate, margin cartila- 
ginous, erenately 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, 21-31 in. long, 13-12 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 lines apart, on slender pedicels 10 lines, the upper ones 6 lines long; sepals as 
in the preceding; tube of the corolla slender, a little swollen 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. 
