HOUSE, THE GENUS IPO MCE A 
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52. Ipomoea longipedunculata (Mart. & Gal.) Hemsley, Biol. Cent.- 
Am. Bot. 2: 389. 1882. 
Pharbitis longipedunculata Mart. & Gal. in Bull. Acad. Brux. XII. 2: 271. 1845. 
Stems reflexed hispid to nearly glabrate; leaf-blades orbicular-ovate, 6-10 cm. 
long, acute or acuminate, entire or rarely 3-lobed, deeply cordate, densely pubescent 
above and ciliate; peduncles usually elongated, 8-20 cm. long, hirsute, 1- to 5-flow- 
ered; pedicels 1-4 cm. long; sepals subequal, oblong-lanceolate, the outer ones 
usually obtuse, the inner acute, 12-15 mm. long, hirsute, the inner ones with scarious 
margins; corolla rose-purple, 6-8 cm. long, glabrous. 
Type locality: “Crescit in Mexico, in Sylvis El Sabino prope Ixmi- 
quilpan.” 
Distribution: Thickets and forests, San Luis Potosi to Guatemala. 
Specimens examined: San Luis Potosi, Palmer 45, 1902 (N, Y, G). 
Vera Cruz: Orizaba, Muller 242 & 1567, 1855 (C); Seaton 256, 1891 (C, 
G); Pringle 7053, 1895 (G). Morelos; Purpus 1755, 1905 (Y, G). Rose 
& Hay 5665, 1901 (N, G). Mexico; Borgeau 408, 1856 (G), 1738, 1866 
(Y). Pringle 6452, 1896 (G, N, C), Urbina, 1881 (M); Altamirano, 1888 
(M). Oaxaca; E. W. Nelson 1184, 1894 (N); Conzatti & Gonzalez 143 
& 473, 1895 (G); Pringle 5665, 1894 (G), 8432, 1900 (G, Y, N). Jalisco; 
Palmer 335, 1886 (N, C, G), Pringle 4448, 1893 (G, N, C). 
Guatemala; San Miguel Uspantam, Quiche, John Donnell Smith 
(legit Heyde & Lux.) 3189, 1892 (G). 
53. Ipomoea orizabensis (Pelletan) Ledenois; Steud. Nom. ed. 2, 818. 
1841. 
Ipomoea batatoides Benth. PI. Hartw. 46. 1840. Not I. batatoides Choisy, 1837. 
Convolvulus orizabensis Pelletan, in Jour, de Chemie Medicale, de Pharmacie et de 
Toxicologie 10: 1. 1834. 
Ipomoea mestitlanica Choisy in DC. Prodr. 9: 389. 1845. 
Root tuberous; stems glabrous or finely pubescent; leaf-blades ovate, shallowly 
cordate, 3-lobed or entire, 7-10 cm. long, acuminate, lateral lobes not spreading; 
peduncles 1- to 5-flowered; sepals lanceolate, thin, smooth, subequal, acuminate, 
10-15 mm. long; corolla 7-8 cm. long, the purplish-blue limb shading into white 
below. 
Type locality: Near Orizaba, Mexico. 
Distribution: Dry or stony places, northern Mexico to Oaxaca. 
Illustrations: Bot. Reg. pi. 36. 
Specimens examined: Nuevo Leon; near Monterey, Pringle 8737, 
1903 (G, N, Y). Oaxaca; Cerro de San Felipe, Conzatti & Gonzalez 447, 
1897 (G). Valley of Oaxaca, E. W. Nelson 1159, 1894 (N, G). 
