88 ON SOUTH-AMERICAN APOCYNACEZ. 
branches much thickened at the nodes, forming rough annular rings ¿-13 in. apart, 
where the leaves have fallen off. The leaves are lanceolate, rarely oblong, acute and 
subinequilateral at the base, gradually acuminate at the summit, with subrevolute 
margins, thinly chartaceous, fuscous above, pale and yellowish below, eglandular, with 
slender patent nerves suddenly arcuately conjoined within the margins, 2 to 4 in. long, 
1-13 in. broad, on slender petioles 13-3 lines long: 6 or more flowers are crowded on a 
short axillary peduncle 2 lines long, upon pedicels 3 lines long; 5 acute sepals 1 line 
long, each with an internal lanceolate scale; tube of corolla narrowly cylindrical, 
6-8 lines long, subventricose in the middle; the segments oblique oblong, 6 lines long, 
2 lines broad; stamens included in the swollen portion of the tube; fuscous anthers 
shortly biaristate at the base, with an acute membrane at the summit; a disk of 5 ovate 
membranaceous lobes longer than the ovaries; 2 follicles, subterete, 1-2 in. long; seeds 
small, oblong, smooth. 
6. MALOUETIA LACTIFLUA, nob.: Tabernemontana, sp., Benth. l. c. p. 245; Schomb. Ann. Nat. Hist. i. 
p. 64: v. s. in herb. Mus. Brit. R. Berbice (Schomb. 168) : foliis oblongis, fusce rubro-viridibus, imo 
subacutis, apice in acumen lineare obtusulum constrictis, chartaceis, marginibus crebre undulatis, 
supra fusco-viridibus, rubentibus, nervis semiimmersis, opacis, nigro punctulatis, subtus pallidioribus, 
subferrugineo-opacis, subrugulosis, costa nervisque patentibus, prominulis, rubellis; petiolo tenui, 
canaliculato, quam limbus 12plo breviore: floribus ignotis. 
There can be no doubt that this is a species of Malouetia. It is a very lactescent tree, 
yielding a vegetable milk, used by the natives, and also forms a useful varnish, according 
to Schomburgk. The leaves are 3 in. long, 1 in. broad, on a petiole 3 lines long. 
7. MALOUETIA SCHOMBURGKII, Müll. Linn. xxx. p. 409. In Guiana Brit. Pomaroon (Schomb. 830, 
1386) : non vidi. 
A species resembling M. nitida in habit. It has dark, slender branches, with axils 
1$ 2$ in. apart, its branchlets being paler; leaves oblong-ovate, acute at both ends, 
chartaceous, 4—4% in. long, 14-20 lines broad, on petioles 93-16 lines long; flowers 1 in. 
long; sepals linear-lanceolate, erect, 13 line long; tube of corolla slender above, broader 
at its base, 6 lines long; segments linear acute, hispidulous within at the base; stamens 
partly exserted ; disk of 5 erect, fleshy, truncated lobes, enclosing 2 ovoid ovaries, 
hispidulous at their apex; style slender below, 44 lines long. 
8. MALOUETIA OBTUSIFOLIA, A. DC. Prodr. viii. 379. In Guiana: v. s. in herb. Mus. Brit. Cayenne 
(Martin). 
The leaves are stifly chartaceous, with entire, subrevolute margins, of a reddish hue 
above, opake, with immersed nerves, beneath ferruginous-opake, with slender prominu- 
lent nerves having porous glands in their axils, 34 in. long, 12 in. broad, on petioles 
3 lines long; pedicels 5 lines long; sepals 14 line long; tube of corolla 5 lines long; 
segments lanceolate-oblong, 9 lines long, with dextrorse contortion; stamens included, 
half-exserted at their apex. 
9. MALOUETIA LANCEOLATA, Müll. J, c. p. 93, tab. 29. fig. 3: Malouetia tamaquarina, var. Brasiliensis, 
