HOUSE, THE GENUS IPOMCEA 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 844^, 

 1900 (G, N, Y) . Pringle 1 3590 (G) . 



u 127. Ipomoea seducta sp. nov. 



Closely resembling /. 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 3403, 

 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 1184 (in part), 1894 (N, G). 



i. 129. Ipomcea elongata Choisy in DC. Prodr. 9: 355. 1845.— Hallier 

 f. in Bull. Herb. Boiss. 5: 1052. 1895. 



Calonydion dubium Mart. & Gal. Bull, in Acad. Brux. XII. 2: 268. 1845. 

 Ipomcea dubia Hemsley, Biol. Cent.-Am. Bot. 2: 386. 1882. Not /. dubia Roem. 



& Schult. 1819. 

 Ipomcea mestecensis House, Bot. Gaz. 43: 411. 1907. 



Glabrous or pubescent; leaf-blades ovate-lanceolate, sagittate or cordate-sao-it- 



