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ANNALS NEW YORK ACADEMY OF SCIENCES 
Ipomoea imparati Griseb. Cat. PI. Cub. 203. 1866. 
Batatas littoralis Choisy, in DC. Prodr. 9: 338. 1845. 
Ipomoea sinuata Kuntze, Rev. Gen. PI. 2: 442. 1891. 
Batatas incurva Benth. in Hook. Niger FI. 467. 1849. 
Type locality: Antilles. 
Distribution: Sandy soil and shores, circumtropical. In America, 
from South Carolina and Florida to South America and West Indies. 
Illustrations: Plum. Am. pi. 90. /. 2. Cyrill, PI. Rar. fasc. 1: pi. 5. 
Mart. FI. Bras. 7: pi. 94- 
GO. IpomoBa schaffneri S. Wats, in Proc. Am. Acad. 18: 123. 1882-83. 
Stems puberulent; leaf-blades orbicular, deeply cordate, acute, 3-4 cm. broad, 
unequally and sinuately dentate near the base; sepals equal, ovate, acute, 8 mm. 
long, 4-5 mm. broad, pubescent. 
Type locality: Near San Luis Potosi, Mexico. 
Distribution: Arid plains and thickets, northern Mexico. 
Specimens examined: Schafjner 621, 1876 (type—G, N). 
61. Ipomoea hartwegii Benth. PI. Hartw. 15. 1839. — Choisy in DC. 
Prodr. 9: 376. 1845. 
Stems finely pubescent, herbaceous, 50-100 cm. long; leaf-blades ovate, deeply 
cordate, entire, acute, 2-3 cm. long; petioles about as long and 2-glanded at the 
apex; peduncles 4-6 cm. long, 1-2-flowered; sepals somewhat unequal, narrowly 
ovate, obtuse or rounded at the apex, puberulent, dark-colored with pale scarious 
margins, 7-9 mm. long; corolla 6-7 cm. long, white. 
Type locality: Mexico. 
Distribution: Stony or dry thickets, central Mexico. 
Specimens examined: Hartweg 96 (dupl. type—G). Michoacan, 
Dr. Nicolas Leon , 1885 (M). Queretaro; San Juan del Rio, Pringle 
10028, 1905 (G, Y, N). Between Hacienda Ciervo and Cadereyta, Rose, 
Painter & Rose 9704, 1905 (Y, N). 
62. Ipomoea ignava sp. nov. 
Stems trailing from a perennial, tuberous root; pubescent, slender; leaf-blades 
triangular-ovate or triangular-hastate, 1-6 cm. long and as broad, obtuse, sinuately 
toothed toward the base, basal auricles 5-15 mm. long, appressed-hirsute or glabrate 
above, pubescent beneath, on the petioles and at the base of the peduncles; peduncles 
slender, often exceeding the leaves, 1-flowered; pedicel 5-10 mm. long; sepals very 
unequal, oblong-lanceolate, outer ones 4-5 mm. long, obtuse and muricate, inner 
5-7 mm. long and rounded; corolla slender-funnelform, 5-7 cm. long, blue, the 
