ON SOUTH-AMERICAN APOCYNACEZR. 15 
long, 10-11 lines broad, on channelled fossated petioles 4-5 lines long: panicle terminal, 
subtrichotomous, bracteated, glabrous; bracts small, ovate; flowers white, having the 
smell of jasmine; pedicels 13 line long: sepals small, ovate, imbricated, somewhat 
unequal; tube of corolla funnel-shaped, 8 times as long as the calyx, segments oblong, 
revolute at the apex, imbricated at the base: stamens acute, sessile, inserted within the 
tube: ovary subbilocular, ovules attached to a thickened placenta in the axis; style short, 
subulate; stigma simple: drupes ovate-oblong, fleshy, edible, 1 in. long, 2-locular, filled 
with a lactescent, glutinous pulp, each cell containing one plano-convex seed. 
From these descriptions, Lacmellia is shown to differ from Ambellania in its more 
membranaceous corolla, with lanceolate segments revolute at the apex, in its much 
longer anthers, the filaments inserted in a pilose ring near the base of the tube, a conical 
10-costate style, a much smaller fruit, of thinner consistence, with a single plano-convex 
seed in each cell, clothed in a mucilaginous envelope. Although it approaches Zschokkea 
in its fruit, it differs in its corolla with much longer and lanceolate segments and a 
shorter tube. 
ZSCHOKKEA. 
A valid genus, established by Miiller in 1860 upon several species from Brazil and 
Guiana, besides another from the Upper Amazonas river. It has been united with 
Lacmellia by the authors of the Gen. Plant. (ii. 694); but it appears to me it should be 
kept distinct, as it differs from that genus in the extremely short rounded segments of the 
corolla, in its very long slender anthers bidentate at their base and enclosed within the 
upper part of the tube of the corolla, in its simple style, in the densely barbate stig- 
mata, in its smaller, dry, capsular fruit, and contains a single plano-convex dry seed, 
in which respect it approaches Rauwolfia. 
The following are its known species :— 
— 
. ZscHOKKEA GRACILIS, Müll. Z. c. p. 21, tab. 6. fig. 1. River Amazonas, near Barra do Rio Negro 
(Spruce 1000). 
2. —— RAMOSISSIMA, Müll. Z. c. p. 21, tab. 7. River, Uhaupes (Spruce 2628). 
ARBORESCENS, Müll. Z. c. p. 22, tab. 6. fig. 3. Rio Negro (Spruce 1001-1922). 
MoNosPERMA, Müll. /. c. p. 22, tab. 6. fig. 2. Santarem (Spruce 679). 
MICROCARPA, Müll. Z. c. p. 23. Rio Negro (Spruce 3537). 
FLORIBUNDA, Müll. /. c. p. 23 : Hancornia floribunda, Popp. Gen. iii. 70, tab. 279. River Amazonas, 
near Ega (Póppig, 2723). 
GUIANENSIS, Müll. Linn. xxx. 391. French Guiana (Poiteau). 
CUPIRANA. 
This genus is the Cowpoui of Aublet, who figured the plant and unripe fruit only, 
which is represented as if crowned with a superior calyx—a mistake originating in the 
inversion of the detached drupe: hence the genus has been referred by most botanists to 
the Myrtacee, De Candolle placing it among the doubtful members of that family. 
Endlicher and Lindley ranged it among the Barringtoniee, while Hooker and 
Bentham referred it to Pentagonia among Rubiacee. Its true place, however, is un- 
questionably in Apocynacee, as I have ascertained by flowering specimens of the same 
