312 APOCYNACEZ, 
5. Prestonia mexicana, A. DC. Prodr. viii. p. 429; Calques des Dess. Fl. Mex. 
795. | 
Mitozus mexicanus, Miers, Apoc. 8S. Amer. p. 225. 
Soorn Mexico, San Bartolo, Oaxaca (Andrieur, 251). Hb. Kew. 
6. Prestonia schizadenia, Hemsley. 
Hemadictyon schizadenium, Mill. Arg. in Linnea, xxx. p. 431. 
SoutH Mexico, Papantla (Karwinskz). 
7. Prestonia sericea, Mart. et Gal. in Bull. Acad. Brux. xi. p. 360. 
Exothostemon sericeum, Miers, Apoc. S. Amer. p. 241. 
Sout Mexico, Oaxaca, near the Pacific (Galeotti, 1586). 
13. THENARDIA. 
Thenardia, H. B. K. Nov. Gen. et Sp. ii. p. 209; Benth. et Hook. Gen. Plant. ii. p. 710. 
One or two climbing species, restricted to Mexico. 
1. Thenardia floribunda, H. B. K. Nov. Gen. et Sp. iii. p. 210, t. 240. 
Souta Mexico, near the city of Mexico, at about 7000 feet (Humboldt & Bonpland), 
Oaxaca (Ghiesbreght), without locality (Bates). Hb. Kew. 
2. Thenardia? suaveolens, Mart. et Gal. in Bull. Acad. Brux. xi. p. 359. 
South Mexico, Michoacan (Galeotti, 1557). 
14. FORSTERONTIA. 
Forsteronia, G. F. W. Mey. Prim. FI. Esseg. p. 183; Benth. et Hook. Gen. Plant. ii. p. 710. 
An exclusively Tropical-American genus, comprising about thirty shrubby climbing 
species. 
1. Forsteronia spicata, G. F. W. Mey. Prim. Fl. Esseq. p. 135; DC. Prodr. 
Vili. p. 437. 
Echites spicata, Jacq. Amer. t. 29. 
Thyrsanthus spicatus, Miers, Apoc. 8. Amer. p. 95. 
SoutH Mexico, Campeachy (Houston, ex Miers, loc. cit.)—CoLoMBIA. 
15. APOCYNUM. 
Apocynum, Linn. Gen. Plant. n. 305 ; Benth. et Hook. Gen. Plant. ii. p. 716. 
Erect herbs or half-shrubs, inhabiting the south of Europe, Temperate Asia, and 
North America—three species belonging to the Old World, and two limited to 
America. 
