256 ANNALS NEW YORK ACADEMY OF SCIENCES 



161. Ipomoea signata House, Muhlenbergia 3: 46. 1907. 



Stout, perennial; stems and foliage densely pubescent or hirsute; stems re- 

 trorsely hirsute and terete; leaf-blades ovate, cordate, acute, 4-6 cm. long; ped- 

 uncles 8-12 cm. long, 1- to 3-flowered; calyx glabrous; sepals ovate, 9-10 mm. 

 long; corolla crimson, 6-7 cm. long, glabrous. 



Type locality: Between Jacaltenango and San Martin, Guatemala. 



DiSTRiBUTiox : Known only from the type locality. 



Specimens ex.\mined; E. W. Nelson 3595, 1895 {iyi^e — 252762 — ^). 



162. Ipomoea tuxtlensis sp. nov. 



A slender, perennial, twining vine, 2-3 m. long, softly pubescent; leaf-blades 

 ovate, cordate, acuminate, entire or more or less 3-lobed, 5-8 cm. long, nearly as 

 broad, softly appressed-pubescent above, sericeous or silvery beneath; petioles 

 shorter than the blades; inflorescence subsessile on peduncles 4-8 mm. long, 3- to 7- 

 flowered; bracts linear-spatulate, 8-18 mm. long; pedicels 4-5 mm. long or less; 

 sepals subequal, oblong-ovate, outer ones densely sericeous-pubescent, rounded at 

 apex, inner ones glabrous or nearly so, submembranaceous, retuse at apex, 10-12 

 mm. long; coroUa deep purple, 3.5-5 cm. long, the limb 3-4 cm. broad and 5-lobed. 



Mexico: Chiapas, Tuxtla, 2400-2800 ft. alt. E. W. Nehon 8094, 1895 

 (ty^e — 234042 — N); 3102, 1895 {2S3069 — N, G). 



163. Ipomoea demerariana Choisy in DC. Prodr. 9: 361. 1845. — 



Griseb. Fl. Br. W. Ind. 471. 1861. 



Leaf-blades orbicular, deeply cordate, acute, 8-16 cm. broad; peduncles 10-20 

 cm. long, 3-several flowered; sepals 15-18 mm. long; corolla purple (j'ellow fide 

 Choisy), 5-8 cm. long, fuimelform; anthers contorted. 



Type locality: Demerara. 



Distribution: Lesser Antilles, Guiana and Brazil. 



Specimens exajwined: Dominica; Lloyd 241, 633, 9S2, 1903 (Y). 

 Guadeloupe; Duss 4026, 1899 (Y). Martinique; Duss 4102, 4402, 1899 

 (Y). 



164. Ijwmoea chenopodiifolia (Mart. & Gal.) Hensley, Biol. Cent.- 



Am. Bot. 2: 385. 1882. 



Calonyction chenopodiifolmm Mart. & Gal. Bull, in Acad. Brux. XII. 2: 269. 1S45. 

 — Walp. Rep. 6: 531. 1847. 



The perennial stems woody, muricate or tuberculate, hirsute with reflexed hairs; 

 leaf-blades 8-12 cm. long, about 5 cm. broad, pilose beneath and on the veins above, 

 the base hastate with a broad open sinus: petioles short; peduncles shorter than the 

 petioles, pilose, 3-4 cm. long, 1-flowered; sepals ovate, obtuse, apiculate, glabrous; 

 corolla purple, 5-8 cm. long. 



