256 ON SOUTH-AMERICAN APOCYNACEZ: 
both: ends, thinly chartaceous, intense green above, pallid green beneath, scarcely pubes- 
cent, 2-44 in. long, 13-13 in. broad, on petioles 2—4 lines long; raceme lateral, longer 
than the leaves? on a peduncle bare at the base, bearing above 5-8 approximate alternate 
flowers, on pedicels 6-9 lines long, supported by bracteoles one fourth their length; 
sepals acuminate-lanceolate, revolute and ciliate on the margins, 24 lines long, with an 
inner ovoid scale equally broad; corolla glabrous, its tube 7 lines long, slightly con- 
stricted in the middle, its appendages semi-exserted ; segments 24 lines long, 14 line 
broad; stamens inserted on a pilose ring in the middle of the tube; anthers cohering, 
somewhat exserted ; disk of 5 short lobes, longer than the fusiform ovaries. . 
3. HÆMADICTYON MaRGINATUM, Benth. Hook. Journ. Bot. iii. p. 250; A. DC. Lc. p. 426. In Guiana 
Brit. Pirara (Schomb. 713) : non vidi. 
A glabrous climbing plant, near H. venosum, with oblong leaves, acute at both ends, 
coriaceous, smooth above, with recurved thickened margins, 2-3 in. long; raceme longer 
than the leaves, on a peduncle bare at its base, bearing above several flowers on pedicels 
minutely bracteolate ; calyx and corolla exactly as H. venosum. 
4. Hamapicryon CAYENNENSE, A. DC. /. c. p. 427. In Cayenne: non vidi. 
A climbing plant, with slender scabridulous branches ; leaves elliptic, obtuse at the 
base, cuspidately acuminate, membranaceous, glabrous above, with distant nerves and 
veins, subscabridulous beneath, 2-23 in. long, 14-13 in. broad, on petioles 5 lines long; 
raceme elongated, glabrous, the bare portion of the peduncle as long as the leaves, bear- 
ing above many flowers on twisted pedicels 6-7 lines long, minutely bracteolate ; sepals 
lanceolate, acuminate, glabrous, 2 lines long, with an inner ovate denticulate seale ; 
tube of corolla 6-7 lines long, glabrous, cylindrical, a little wider above, with a callous 
ring in the mouth, and beneath it 5 linear included appendages ; segments oblong, 
obtuse, crispate, shorter than the tube; anthers a little exserted; disk of 5 ovate obtuse 
lobes, subconnate at their base. 
5. Hamapicrron GAUDICHAUDIL, A. DC. (non Müll.) Le p. 426: Echites suberosa, Vell. Fl. Flum. 
p. lll, Icon. iii. tab. 34. In Brasilia: v. v. e£ sicc. in herb. meo (no. 1585), circa Rio de Janeiro ; 
v. s. in herb. Mus. Brit. prov. Sas Paulo, Santo Amaro (Bowie & Cunningham). 
A climbing species, with slender terete flexuose branches marked by prominent 
Jenticels, with dilated axils 9 in. apart, marked by a transverse somewhat vaginant 
ridge; leaves oblong, narrowed below the middle, roundish or subobtuse at the base, 
shortly acuminate and callously mucronate at the summit, margins sinuously undulate, 
chartaceous, very glabrous, bright green above, sulcate on the midrib, with about 7 
pairs of fine divaricate nerves arcuately conjoined, pale yellowish beneath, opake, with 
prominent midrib, nerves, and finely reticulated veins, 4-6} in. long, 14-24 in. broad, on 
slender channelled petioles 3-4 lines long; raceme solitary and lateral at the nodes, 
7 in. long, on a slender peduncle bare for half its length, bearing upwards 16-20 alter- 
nate or geminate flowers, un slender patent pedicels 4-5 lines long, supported by minute 
recurved bracteoles ; sepals acutely oblong, with parallel nerves, imbricate, with. an 
