14 RUBIACEA. 
5. Exostemma mexicanum, A. Gray, in Proc. Am. Acad. v. p. 180. 
SourH Mexico, near Tantoyuca, Huasteca (Ervendberg, 125), Sierra San Pedro Nolasco 
(Jurgensen, 517). Hb. Kew. 
Tribe III. HENRIQUEZIE. 
Henriqueziee, Benth. et Hook. Gen. Plant. i. pp. 8, 12. 
A South-American tribe of two genera and five species, extending from North Brazil 
to Venezuela, but not hitherto found within the limits of our flora. 
Tribe IV. CONDAMINEA. 
Condaminee, Benth. et Hook. Gen. Plant. ii. pp. 8, 12. 
Nine genera are referred to this tribe, seven of which are American, and two peculiar 
to the Pacific and Molucca Islands. 
12. CONDAMINEA. | 
Condaminea, DC. Prodr. iv. p. 402; Benth. et Hook. Gen. Plant. ii. p. 44. . 
Five or six species of small trees or shrubs, inhabiting western Tropical America, from 
Bolivia to Panama. 
1. Condaminea corymbosa, DC. Prodr. iv. p. 402. 
Macrocnemum corymbosum, Ruiz et Pav. Fl. Peruv. ii. p. 48, t. 189. 
Panama, Veraguas (Hinds), Boquete (Seemann, 1593).—Southward to Bottvia. Hb. 
Kew. 
13. RUSTIA. 
Rustia, Kl. in Hayne Arzencigew. xiv. sub tab. 15; Benth. et Hook. Gen. Plant. ii. p. 45 (Tresan- 
thera et Henlea, Karst. Fl. Colomb. i. p. 37, t. 19, et p. 157, t. 78). 
A wholly New-World genus of six or seven arboreous species, extending from Guate- 
mala to Brazil. 
1. Rustia occidentalis, Hemsley. 
Exostemma occidentale, Benth. Bot. Voy. ‘ Sulphur,’ p. 104. 
GuatTeMaLa (Friedrichsthal) ; Panama, Chagres (Fendler, 289). —Conomsra. Hb. Kew. 
The Panama specimens differ from the others in having much smaller leaves. 
14. PORTLANDIA. 
Portlandia, P. Br. Hist. Jam. p. 164, t. 11; Benth. et Hook. Gen. Plant. ii. p. 45. 
About eight shrubby and small arboreous species, inhabiting the West Indies and 
Mexico. 
1. Portlandia mexicana, Hemsley, Diag. Pl. Nov. pars altera, p. 31. 
Glaberrima, ramis teretibus vel obsolete angulatis, foliis confertis crasse coriaceis nitidis oblongis, 
