HOUSE, THE GENUS IPO MCE A 
241 
126. Ipomcea emetica Choisy in DC. Prodr. 9: 376. 1845. 
Ipomoea caudata Femald in Proc. Am. Acad. 36: 498. 1901. 
Slender; leaf-blades thin, 3-5 cm. long, apex caudate-acuminate, base sagittate, 
basal lobes 1-2 cm. long, acuminate; corolla 5-6 cm. long, the limb 2-3 cm. broad. 
Type locality: Tepelpse circuitum Mexico. 
Distribution: Exposed places at high altitudes, central Mexico. 
Specimens examined; Sierra de Tepoxtlan, Morelos, Pringle 81+1+8, 
1900 (G, N, Y). Pringle 13590 (G). 
127. Ipomcea seducta sp. nov. 
Closely resembling I. purga; glabrous, perennial from a tuberous root; leaf- 
blades orbicular-ovate, cordate, 6-10 cm. long, acuminate, basal sinus often closed, 
pale beneath; petioles short; peduncles as long as the petioles, usually 1-flowered; 
sepals unequal, outer ones lanceolate, 4-5 mm. long, acute, inner fully 10 mm. long, 
subacute or obtuse; corolla 5-6 cm. long, funnelform, the whitish tube expanding 
from the base, constricted within the calyx, limb purple, 5 cm. broad; stamens and 
style included. 
Guatemala; Cubilquitz, Alta Verapaz, Tuerckheim (J. Donnell Smith 
distr. 7926), 1901 (type — C). Coban, Tuerckheim (J. Donnell Smith distr. 
101), 1887 (C). Mexico; Chiapas, Near Yajalon E. W. Nelson 31+03, 
1895 (252535 —N). 
128. Ipomcea simulans Hanbury, Joum. Linn. Soc. 11: 281. 1871. 
Leaf-blades ovate-lanceolate, 5-8 cm. long, caudate-acuminate, base cordate- 
sagittate, basal lobes acute or rounded, 1 cm. long, glaucous beneath; sepals un¬ 
equal, inner ones 4-6 mm. long; corolla 4-6 cm. long, purple with a white tube. 
Type locality: Mexican Andes, Piedra Gorda district, Guanajuato; 
also the cold regions of Oaxaca. 
Distribution: High altitudes of central and southern Mexico. 
Specimens examined: Mechoacan, Schiede (G). Morelos, Pringle 
6565, 1896 (G, N, C). Oaxaca; E. W. Nelson 1181+ (in part), 1894 (N, G). 
129. Ipomcea elongata Choisy in DC. Prodr. 9: 355. 1845.— Hallier 
f. in Bull. Herb. Boiss. 5: 1052. 1895. 
Calonyction dubium Mart. & Gal. Bull, in Acad. Brux. XII. 2: 268. 1845. 
Ipomoea dubia Hemsley, Biol. Cent.-Am. Bot. 2: 386. 1882. Not I. dubia Roem. 
& Schult. 1819. 
Ipomoea mestecensis House, Bot. Gaz. 43: 411. 1907. 
Glabrous or pubescent; leaf-blades ovate-lanceolate, sagittate or cordate-sagit- 
