240 
ANNALS NEW YORK ACADEMY OF SCIENCES 
Corolla limb 2-3 cm. broad, tube 3-4 cm. long; leaf- 
blades strongly sagittate, long-caudate. 
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. 
Leaf-blades cordate-sagittate. 
Corolla 4-5 cm. long; sepals 4-6 mm. long. 
Corolla 8-10 cm. long, sepals 8-10 mm. long. 
Corolla tubular, 5-6 cm. long and slightly bent; 
limb 15 mm. broad; leaf-blades 3-4 cm. long, 
cordate. 
Leaf-blades small, reniform-ovate, 1-2 cm. long or less; 
corolla 6-8 cm. long, very slender. 
126. 
I. emetica. 
127. 
I. seducta. 
128. 
I. simulans. 
129. 
I. elongata. 
130. 
I. urbinei. 
131. 
I. suffulta. 
125. Ipomoea purga (Wender.) Hayne, Arzn. Gew. 12: pis. 33, 34- 
1833. — Choisy in DC. Prodr. 9: 374. 1845.— Willis, Prac. 
FI. 184. 1894. 
Convolvulus jalapa Schiede, in Linnaea 5: 473. 1830. Not C. jalapa 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. 
PI. 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: Hayne, 1. c.; Nees Offic. Pfl. Suppl. 3: pi. 13. Berg. 
& Schmidt, Offiz. Gew. 1: pi. 5. Curt. Bot. Mag. pi. 4380. Am. Journ. 
Med. Sci. 1830. pi. 7. Bentl. & Trin. Med. Bot. pi. 186. Zuccar. 1. c. 
pi. 12. Royle, Ill. Himal. 308. Bot. Reg. pi. 40. 
Specimens examined : Vera Cruz; Muller 889, 1853 (C). Jalapa, 
Schiede 149, 1839 (C); A. Dupes 3, 1906 (G); C. L. Smith 1930, 1894 (G); 
Trinidad, Pringle 8889, 1904 (G). Valle de Cordova, Borgeau 1730, 1865 
(G). Zucuapan, Purpus 2212, 2392, 1907 (G, Y). Jalisco; Palmer 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; Deam 317, 1905 (G, Y). J. Donnell Smith 2014, 1890 (G, Y, N). 
Costa Rica; Tonduz 1771, 1894 (K). Jamaica (introduced); Britton 155, 
1906 (Y). 
