244 ANNALS NEW YORK ACADEMY OF SCIENCES 



Convolvulus filiformis Thunb. Fl. Cap. 2: 168. 1823. Not C. filiformis Desr. 1789. 



Ipomoea denticulata R. Br. Prodr. 485. 1810. 



Convolvulus sonneratii Rees, Cyclop. No. 29. 1819. 



Convolvulus denticulatus Spreng. Syst. 1: 603. 1825. Not C. denticulatus Desr. 



1789. 

 Ipomoea filicaulis Willd. Sp. PI. 1: 848. 1798.— Choisy in DC. Prodr. 9: 353. 1845. 

 Ipomcea filiformis Voigt. Hort. Suburb. Calc. 356. 1845. Not /. filiformis Jacq. 



1763. 

 Ipomoea bidentata G. Don, Gen. Syst. 4: 266. 1838. 

 Fraxima tridentata Raf. Fl. Tellur. 4: 83. 1838. 

 MerremiaangustifoliaUalhev f.Bot. J ahrh. 16: 552. 1893: 18: 117. 1894. 



Type locality: Guyana. 



Distribution: Thickets and shores, circumtropical. Introduced on 

 ballast about the seaports of the southern United States. 



Illustrations: Rheed. Mai. 11: pi. 55. Bot. Reg. p/. 317. Jacq. 

 Ic. Rar. pi. 317. Bot. Mag. pi. 5426. 



Specimens examined: On ballast, Brunswick, Georgia, Harper 1523, 



1902 (G). Porto Rico: Sintenis 6763, 1887 (Y); Heller 1276, 1899; 6U0, 



1903 (Y); Underwood & Griggs 982, 1901 (Y). 



133. Ipomcea tenuissima Choisy in DC. Prodr. 9 : 376. 1845. — Small, 



Bull. N. Y. Bot. Gard. 3 : 434. 1905. 



Slender and herbaceous above, from a perennial root; leaf-blades 2-5 cm. long; 

 peduncles 4-6 cm. long, l-flowered; sepals ovate-lanceolate, obtuse, mucronulate, 

 6-8 mm. long; corolla crimson, 3-4 cm. long. 



Type locality: Desportes, Cuba. 



Distribution : Cuba, Isle of Pines and subtropical Florida. 



Specimens examined: Florida; Pinelands near Cutler, Small & 

 Carter 712, 750, 1903; 1705, 1834, 1953, 1904 (Y). Biscayne Bay, Curtiss, 

 1880 (Y). Dade Co. Britton 163, 1904 (Y). Cuba: "Open grassy places 

 at Salvador and Savanas, Cayo del Rey," C. Wright 1651, Sept. 11, 1859 

 (G, C). Cieneguita, Combs 238, 1895 (Y). J^Iadruga, Britton & Shafer 

 680, 1903 (Y). Pinar del Rio, Shafer 558, 1903 (Y). Matanzas, Britton 

 & Wilson 422, 1903. Santa Clara, Baker 2495, 1904 (Y). Habana, 

 Van Hermann 980, 1905 (Y). Isle of Pines, Curtiss 495, 1904 (G, Y). 



134. Ipomoea sagittula sp. nov. 



A slender, twining, perennial vine, with weak, woody stems, bark thin, whitish 

 exfoliating; leaf-blades broadly lanceolate, acute and cuspidate, base sagittate, 

 4-7 cm. long, 1.5-3 cm. broad, the basal auricles 1 cm. long or less, obtuse and clasp- 

 ing the stem, glabrous above, minutely white-dotted beneath; petioles 2-6 mm. 



