ON SOUTH-AMERICAN APOCYNACEJX. 87 
pressa, glabra, ex una facie hilo centrali peltatim affixa, marginibus membranaceis canaliculatim 
introflexis ; albumen oblongum, compressum, parcum ; embryo hoterotropus ; radicula parva, supera, 
teres, cotyledonibus 2 oblongis 4plo brevior. 
Frutices plerumque Brasiliani, dichotome ramosi; folia opposita, breviter petiolata; inflorescentia 
breviter pedunculata; flores plurimi, longe pedicellati, subfasciculati. 
1. MALOUETIA TAMAQUARINA, A. DC. Prodr. viii. 378; Deless. Icon. v. p. 31, tab. 47; Müll. (in parte), 
Flor. Bras. fasc. xxvi. p. 92: Cameraria tamaquarina, Aubl. Pl. Guian. i. 260, tab. 102. In Guiana: 
v. s. in herb. Mus. Brit. Cayenne (Aublet), Guiana (Sagot 1143). 
This typical specimen is very different from the two Brazilian plants referred to the 
same species by Dr. Müller. 'The leaves have a rufescent hue, with immersed nerves 
sulcate above, which are slender and prominulent below, with porous glands in 
their axils. 
2. MarourriA Gutanensis, nob.: Malouetia tamarquarina, var. minor, A. DC. l. c. p. 379: Cameraria 
Guianensis, Aubl. /.'c. p. 262: Cameraria lutea, Lam. Dict. i. p. 573. In Guiana: v. s. in herb. 
Mus. Brit. Cayenne (Aublet). 
A species differing from the preceding in its much smaller leaves more acute at the 
base, rarely with porous glands in the axils of the nerves, in its much smaller flowers, the 
corolla having a shorter tube. Its slender branches are shining black, and striated; the 
leaves are lanceolate-oblong, acute at the base, with a narrow, sublinear apex, very entire, 
chartaceous, opakely green above, with slender subimmersed nerves, opake and rufously 
brown below, with reddish nerves and midrib little prominent; they are 3j in. long, 
1 in. broad, on slender, black, channelled petioles 2 lines long. 
3. MaLouETIA ODORATa, nob.: Tabernemontana odorata, Vahl, Ecl. ii. p. 22 (excl. synon.) ; A. DC. 
l. c. p. 379; Benth. Lond. Journ. Bot. iii. 343. In Guiana: v. s. in herb. Mus. Brit. 
(Schomb. 951). 
This species has dichotomous fuscous branches, compressed and channelled on each 
edge; leaves lanceolate, with a narrow obtuse acumen, fuscous green above, with 
immersed nerves, ferruginously opake below, with a darker prominulent midrib, and fine 
nerves, each with a small porous gland in its axil, 21—5 in. long, 7-12 lines broad, on 
petioles 14-3 lines long; peduncle solitary in each node, bearing 3-4 flowers; pedicels 
lin. long, dark and slender; sepals lanceolate, 1 line long; tube of corolla 34 lines 
long; segments oblong, 3 lines long, densely pubescent inside at their base. 
4. MarovzriA Tarumensis, Benth. Lond. Journ. Bot. iii. 344. In Guiana: in Mont. Taruma (Schom- 
burgk) : non vidi. 
A species near M. odorata. It is a tree 50-60 feet high, with dark, shining, dichoto- 
mous branches compressed at the furcations ; leaves 5-7 in. long. It is called “ hotitjou,” 
and yields an abundant milky juice. 
5. MarourmrA Gracinis, A. DC. l c. p. 380: Tabernemontana gracilis, Benth. Journ. Bot. iii. 244. 
In Guiana: v. s. in herb. meo et alior. Upper Essequibo (Schomb. 39). 
A species with straight striated branches and subdichotomous branchlets, its fuscous 
