308 APOCYNACEA. 
Souta Mexico, near Tasco and Tehuilotepec, 5000 to 6000 feet (Humboldt & Bon- 
pland), Gonacatepec (Andrieux, 253). Hb. Kew. 
6. glabra, A. DC. Prodr. viii. p. 343. 
Sour Mexico, Tampico (Berlandier, 189). 
5. AMSONIA. 
Amsonia, Walt. Fl. Carol. p. 98; Benth. et Hook. Gen. Plant. i. p. 702. 
Seven herbaceous or half-shrubby species, whereof six are North American and one 
Japanese. 
1. Amsonia longiflora, Torr. Bot. U.S. & Mex. Bound. Surv. p. 159; A. Gr. 
Synop. Fl. N. Am. ii. p. 82. 
Texas ; New Mexico.—Norts Mexico (ex A. Gray). 
2. Amsonia tomentosa, Torr. & Frem. in Frem. 2nd Rep. p. 316; Torr. Bot. 
U.S. & Mex. Bound. Surv. p. 158. 
Ura ; Texas.—Nortu Mexico, Sonora and Chihuahua (ex Torrey). 
6. ASPIDOSPERMA. 
Aspidosperma, Mart. et Zucc. Nov. Gen. et Sp. i. p. 57, t. 34 ad 36; Benth. et Hook. Gen. Plant. 
ii. p. 702. 
An exclusively tropical American genus of about forty-five arboreous species, the 
greater part growing in Guiana and Brazil. . 
1. Aspidosperma megalocarpon, Miill. Arg. in Linnea, xxx. p. 400. 
Sout Mexico, Colipa (Karwinski), “ ubi ab incolis ‘ Volador ’ nuncupatur.” 
7. PLUMERIA. 
Plumeria, Linn. Gen. Plant. n. 298; Benth. et Hook. Gen. Plant. ii. p. 704. 
A tropical American genus of trees. About forty species have been described, some 
of them probably more than once. Some of the species are cultivated and more or less 
naturalized in other tropical countries. 
1. Plumeria acutifolia, Poir. Dict. Suppl. ii. p. 667; DC. Prodr. viii. p. 392. 
Plumeria acuminata, Ait. Hort. Kew, ed. 2, ii. p. 70; Bot. Mag. t. 8952. 
SoutH Mexico, region of Orizaba (Bourgeau, 2415); GuateMaLa, Duefias (Fraser).— 
Widely dispersed in Tropica, America, and naturalized in many parts of the Old World. 
Hb. Kew. 
2. Plumeria lambertiana, Lindl. Bot. Reg. t. 1378; DC. Prodr. viii. p. 391. 
Plumeria gouani, D. Don; G. Don, Gen. Syst. iv. p. 94. 
Plumeria mexicana, Lodd. Bot. Cab. t. 1024 ? 
Mexico. 
