214 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 Fl. 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. f. 2. Cyrill, PI. Rar. fasc. 1: pi. 5. 

 Mart. Fl. Bras. l:fl. 94- 



60. ■ Ipomoea schaffneri S. Wats, in Proc. Am. Acad. 18: 123. 1882-83. 



Stems puberulent; leaf -blades orbicular, deeply cordate, acute, 3-4 cm. broad, 

 imequally 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: Schaffner 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 970 J^, 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 



