386 CONVOLVULACEA. 
21. Ipomea commutata, Roem. et Schult. Syst. iv. p. 228; A. Gr. Synop. FI. 
~ ON. Am. ii. p. 218. 
Soura Carouina to Texas.—Nortu Mexico, Chihuahua (Potts). Hb. Kew. 
22. Ipomea corralinensis, Choisy in DO. Prodr. ix. p. 361. 
Convolvulus sulphureus, Liav. et Lex. 
Ipomea sulphurea, Don, Gen. Syst. iv. p. 268, non alior. 
South Mexico, San José del Corral (La Liave). 
23. Ipomea costellata, Torr. Bot. U.S. & Mex. Bound. Surv. p. 149; A. Gr. 
Synop: Fl. N. Am. ii. p. 214. 
New Mexico; Arizona.—Mexico (ex A. Gray). 
24. Ipomea dealbata, Hemsley. 
Pharbitis dealbata, Mart. et Gal. in Bull. Acad. Brux. xii. 2, p. 272; Walp. Rep. vi. p. 530. 
SoutH Mexico, Cordillera of Vera Cruz, 3500 feet (Galeotti, 1352), region of Orizaba 
(Botteri, 556 ; Bourgeau, 2814), valley of Cordova (Bourgeau, 2212). Hb. Kew. 
25. Ipomoea delphinifolia, Mart. et Gal. in Bull. Acad. Brux. xii. 2, p. 265; 
Walp. Rep. vi. p. 535. 
Sovrn Mexico, Cordillera of Vera Cruz, 5000 feet (Galeotti, 1366), Zacoalco (Bour- 
geau, 726). Hb. Kew. 
26. Ipomoea deppeana, Don, Gen. Syst. iv. p. 276; DC. Prody. ix. p. 390. 
MExico. 
27. Ipomea digitata, Linn. Sp. Pl. p. 228; Meissn. in FI. Bras. vii. p. 278; 
Griseb. Fl. Brit. W. Ind. p. 469. 
Ipomea mauritiana, Jacq. Hort. Schoenb. t. 200. 
Ipomea paniculata, R. Br.; Bot. Reg. t. 62. 
Batatas paniculata, Choisy in DC. Prodr. ix. p. 339. 
Ipomea insignis, Andr. Bot. Rep. t. 686; Bot. Reg. t. 75; Bot. Mag. t. 1790. 
Panama (ex Grisebach).—Generally dispersed in the Tropics, chiefly on the sea-shore. 
Hb. Kew. 
28. Ipomea dubia, Hemsley. 
Calonyction dubium, Mart. et Gal. in Bull. Acad. Brux. xi. 2, p. 268; Walp. Rep. vi. p. 531. 
SourH Mexico, forests of Misteca Alta and Yavesia, Oaxaca, at 7000 feet (Galeotti, 
1362). | 
29. Ipomea elongata, Choisy in DC. Prodr. ix. p. 355. 
South Mexico, Oaxaca (Andrieux, 212). Hb. Kew. 
30. Ipomea emetica, Choisy in DC. Prodr. ix. p. 376. 
Mexico (Mogino & Sessé). 
