240 ANNALS NEW YORK ACADEMY OF SCIENCES 



Corolla limb 2-3 cm. broad, tube 3-4 cm. long; leaf- 

 blades strongly sagittate, long-caudate. 126. I.emetica. 

 Stamens and style included; corolla not salverform. 

 Leaf-blades ovate or orbicular-ovate, more than 3 cm. 

 long. 



Corolla funnel form. 



Leaf-blades ovate; corolla 5-6 cm. long; sepals 



about 10 mm. long. 127. /. seducta. 



Leaf-blades cordate-sagittate. 



Corolla 4-5 cm. long; sepals 4-6 mm. long. 128. /. simulans. 

 Corolla 8-10 cm. long, sepals 8-10 mm. long. 129. I. eiongata. 

 Corolla tubular, 5-6 cm. long and slightly bent; 

 limb 15 mm. broad; leaf-blades 3-4 cm. long, 

 cordate. 130. /. urbinei. 



Leaf-blades small, reniform-ovate, 1-2 cm. long or less; 



corolla 6-8 cm. long, very slender. 131. I.suffulta. 



X 125. Ipomoea purga (Wender.) Hayne, Arzn. Gew. 12: 'pls. 33, 34. 

 1833. — Choisy in DC. Prodr. 9: 374. 1845.— Willis, Prac. 

 Fl. 184. 1894. 



Convolvulus jalapa Schiede, in Linnaea 5: 473. 1830. Not C. jala-pa L. 1767. 

 Ipomoea jalapa Nutt. & Coxe, in Am. Joum. Med. Sci. 5: 300-307. 1830. — Schiede 



& Deppe, in G. Don, Gen. Syst. 4: 271. 1838. Not I. jalapa Pursh, 1814. 

 Convolvulus purga Wenderoth, in Pharm. Centralb. 1: 457. 1830. — D. Dietr. Syn. 



PL 1: 667. 1839. 

 Ipomoea scheideana Zuccar. in Flora 14: 801. 1831. — Pi. Nov. vel Min. Cogn. 293. 



1832. 

 Exogonium purga & dumosum Benth. PI. Hartw. 46. 1840. 

 Convolvulus officinalis Pelletan; Steud. Nom. ed. 2, 1: 410. 1841. 

 Calonyction galeotii Mart. & Gal. in Bull. Acad. Brux. XII. 2: 268. 1845. 



Type locality: Mexico. 



Distribution: Mountain forests, central Mexico to Central America. 



Illustrations: Ha}Tie, 1. c; Nees Offic. Pfl. Suppl. 3: pi. 13. Berg. 

 & Schmidt, Offiz. Gew. 1: pi. 5. Curt. Bot. Mag. pi. 4280. Am. Journ. 

 Med. Sci. 1830. pi 7. Bentl. & Trin. Med. Bot. pi. 1S6. Zuccar. 1. c. 

 pi. 12. Royle, 111. Himal. 308. Bot. Reg. pi. 49. 



Specimens examined: Vera Cruz; Midler 889, 1853 (C). Jalapa, 

 Schiede 149, 1839 (C); A. Duges 3, 1906 (G); C. L. Smith 1930, 1894 (G); 

 Trinidad, Pri7igle 8889, 1904 (G). Valle de Cordova, Borgeau 1730, 1865 

 (G). Zucuapan, Purpus 2212, 2392, 1907 (G, Y). Jalisco; Pahner 373, 

 18S6 (G, C) ; E. W. Nelson 4022, 4085, 1897 (N). Durango, near Chacola, 

 Goldman 331, 1899 (N). Oaxaca; Rev. L. C. Smith 666, 1895 (G). Guate- 

 mala; Beam 317, 1905 (G, Y). J. Donnell Smith 2014, 1890 (G, Y, N). 

 Costa Rica; Tonduz 1771, 1894 (K). Jamaica (introduced); Britten 155, 

 1906 (Y). 



