ON SOUTH-AMERICAN APOCYNACE. 91 
14. MaLougtia NITIDA, Spruce; Müller, /. c. p. 94. In Amazonas: v. $. in herb. variis Barra do Rio 
Negro (Spruce 1672). 
A species differing in appearance from all others. Its branchlets are brown, 24 lines 
thick, with many prominent yellow lenticels, and with axils 34 in. apart; leaves oblong, 
subacute, and channelled at the base, narrowing gradually upwards and suddenly ter- 
minating in a linear acumen 4 in. long, stiffly chartaceous, margins subrevolute, pale 
green, opake, and rugulous above, yellowish immersed midrib and nerves (about 8 pairs), 
somewhat paler beneath, opake, rugulous, with prominent midrib and subprominulent 
fine nerves, veins scarcely visible, 43-6 in. long, 1-24 in. broad, on channelled petioles 
24 lines long; inflorescence solitary in each axil; peduncle bracteolated, 1 line long, 
supporting 10-12 subfasciculate flowers; pedicels glabrous, 6 lines long; sepals 1 line 
long, lanceolate; tube of corolla narrow, contracted in the middle; segments lanceolate, 
5 lines long, subpuberulous within at their base, with dextrorse convolution. 
15. MALOUETIA rurruracea, Spruce; Müll. Z. c. p. 93. In Brasilia: v. s. in herb. variis Barra do Rio 
_ Negro (Spruce 1566), San Gabriel, Rio Negro (Spruce 2305). 
Its branchlets are somewhat slender, black, striate, dichotomous, with axils 2 in. 
apart; leaves 4-6 in. long, 1-2 in. broad, on petioles 2-4 lines long; inflorescence in 
the dichotomies of the branchlets; peduncle bracteolated, bearing about 6 or 8 fascicu- 
late flowers; pedicels 8 lines long; sepals lanceolate, 1 line long; tube of corolla 
4 lines long; linear segments 6 lines long, dextrorsely convolute; 2 terete, smooth, 
black follicles 12 in. long, 13 line thick. 
16. MALOUETIA AMPLEXICAULIS, Müll. /. c. p. 91. In Amazonas: v. s. in hb. meo Panuré, Rio Uahupes 
(Spruce 2595). 
A species distinguished by its very large leaves, which give it much the appearance of 
a Rhigospira: these are somewhat unequal in the same node, on one side 335 in. long, 
11-2 in. broad, on the other 51—8 in. long, 23-34 in. broad, subcordate and subsessile at 
their base, where they are conjoined by a transverse line, with about 12 pairs of white 
pubescent nerves, each with a poriferous gland in its axil. A corymb of 6 or 8 flowers 
fasciculate on short, bracteolated, opposite, extra-axillary nodules, with slender pedi- 
cels 5 lines long; the sepals are 1 line long; the very slender tube of the corolla 3 lines 
long, a little broader below the mouth, with oblong acute segments dextrorsely con- 
volute in «estivation; stamens partly exserted; the disk is fleshy, tubular, crenately 
lobed on the margin, enclosing 2 pilose ovaries. 
17. MALOUETIA RIPARIA, A. DC. Z. c. p. 380: Tabernemontana riparia, H. B. K. ii. 228. In Nova 
Granada: non vidi. — 
A lactescent tree, 20 feet high, with smooth dichotomous branches; leaves oblong, 
narrowly acute at the base, acuminate, with undulate entire margins, membranaceous, 
with prominent nerves beneath, 4-4] in. long, 16-19 lines broad, on channelled petioles 
scarcely 3 lines long, their margins united by a transverse ridge across the nodes; cymes 
interpetiolar, opposite at the nodes, on a dichotomous peduncle, and shorter than the 
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