RUBIACEX, | 55 
Tribe XXIV. SPERMACOCE. 
Spermacocee, Benth. et Hook. Gen. Plant. ii. pp. 9, 27. 
This tribe is represented in all tropical countries, but most numerously in America, 
It consists of sixteen genera of herbaceous and half-shrubby plants. 
64. TRIODON. 
Triodon, DC. Prodr. iv. p. 566; Benth. et Hook. Gen. Plant. ii. p. 143. 
About half a dozen species of dwarf undershrubs, restricted to Tropical America. 
1. Triodon angulatum, Benth. Pl. Hartw. p. 70. 
Sour Mexico, Teotolingo (Hartweg), Orizaba (Bottert, 7 79: Miiller, 1095), Teosola 
(Linden, 615), valley of Cordova (Bourgeau, 1516), Jalapa, 3000 feet (Galeotti, 615), 
Yucatan and Tabasco (Johnson, 137). Hb. Kew. | 
2. Triodon, sp. 
Sourn Mexico, Orizaba (Botteri, 780). Hb. Kew. 
65. DIODIA. 
Diodia, Linn. Gen. Plant. n. 122; Benth, et Hook. Gen. Plant. u. p. 148. 
About twenty species of annual and perennial herbs, inhabiting the warmer parts of 
America and Tropical Africa. 
1. Diodia conferta, DC. Prodr. iv. p. 5632 | 
Guaremata (Friedrichsthal, 4); Panama, meadows near the city of Panama (Seemann, 
267). Hb. Kew. 
The type is from Brazit. 
9. Diodia crassifolia, Benth. Bot. Voy. ‘Sulphur,’ p. 108. 
Sourn Mexico, San Blas (Hinds), Tepic (Barclay). Hb. Kew. 
_ 8. Diodia prostrata, Sw. Fl. Ind. Occ. i. p. 218; DC. Prodr. iv, p. 562. 
Norra Mexico, region of San Luis Potosi, 6000 to 8000 feet (Parry & Palmer, 303) ; 
GUATEMALA, sandy hills, Santa Rosa (Bernoulli, 689); Nicaragua, Volcan el Viejo, 
Granada, &c. (Grsted, 41, 42, 45).—Jamatca. Hb. Kew. 
Var. 3. longiseta, DC. Prodr. iv. p. 562. 
Mexico (Hanke). | 
4, Diodia radula, Ch. et Schl. in Linnea, iii. p. 342. 
Spermacoce radula, Willd. et Hoffmans. in Roem. et Schult. Syst. ui. p. 531. 
Panama, Chagres (Fendler, 146)—Brazi. Hb. Kew. 
5, Diodia rigida, Ch. et Schl. in Linnea, iii. p. 341. 
Spermacoce rigida, H. B. K. Nov. Gen. et Sp. i. p. 342. 
GuateMaLA, Barranca de Incensio (Bernoulli, 104).—Cusa and VENEZUELA to BrazIL. 
Hb. Kew. 
