210 
ANNALS NEW YORK ACADEMY OF SCIENCES 
54. Ipomoea tyrianthina Lindl. Bot. Reg. Misc. 87. 1832.— Choisy 
in DC. Prodr. 9: 375. 1845. 
? Convolvulus serotinus DC. Cat. Hort. Monsp. 97. 1813. 
llpomcea serotina Roem. & Schult. Syst. 4 : 215. 1819. 
Convolvulus sanguineus Willd.; Roem. & Schult. 1. c. 302. 
Convolvulus superbus H. B. K. Nov. Gen. & Sp. 3: 103. 1819. 
Ipomoea superba G. Don, Gen. Syst. 4: 275. 1838. Not 7. superba Ledeb. 1822, 
or Schrank, 1828. 
Pharbitis tyrianthina Hook. Bot. Mag. 69 : pi. 4024- 1843. 
Pharbitis serotina Choisy in DC. Prodr. 9 : 341. 1845. 
Resembling 7. longipedunculata, but usually more hipid-pubescent; sepals oblong, 
hispid, acutish, subequal, 12-15 mm. long; corolla campanulate-funnelform, 6-7 
cm. long, the tube 2-3 cm. thick, pubescent without. 
Type locality: Between Aguasarco and Volcan Jorullo, Michoacan, 
Mexico (H. B. K.). 
Distribution: Mountain Forests, southern Mexico. 
Specimens examined: Guerrero; Near Chilpancingo, 9000-10200 ft. 
alt. E. W. Nelson 2161 , 1894 (G, N). 
55. Ipomoea venusta (Mart. & Gal.) Hemsley, Biol. Cent.-Am. Bot. 
2: 385. 1882. 
Calonyction venustum Mart. & Gal. in Bull. Acad. Brux. XII. 2: 269. 1845.— Walp. 
Rep. 6: 531. 1846-47. 
Stout, perennial, woody below; stems velvety pubescent and tomentose; leaf- 
blades orbicular-ovate, 10-20 cm. long, shallowly cordate, acute, entire or slightly 
3-lobed, appressed-pubescent above, silvery-canescent beneath; sepals oblong-lanceo¬ 
late, acute or obtuse, 22-30 mm. long, silky-tomentose without; corolla campanu¬ 
late-funnelform, 8-9 cm. long, the tube about 2 cm. thick, hirsute without on the 
plicae and tube. 
Type locality: Province of Tobasco, Mexico. 
Distribution: Southern Mexico and Central America. 
Specimens examined: Puebla; Huatusco, Conzatti 850 , 1898 (G). 
Guatemala: Chiapas, Santa Rosa, J. Donnell Smith (legit Heyde & Lux) 
4350, 1892 (G, C). 
Section III. BATATAS. 
9. Erpipomcea. Creeping or prostrate, annual or perennial vines; 
roots sometimes tuberous, or stems rooting at the nodes; leaf-blades entire 
or lobed. 
