HOUSE, THE GENUS IPOMCEA 189 



Foliage glabrous or nearly so. 



Sepals hairy within, 12-16 mm. long. 17. /. intrapilosa. 



Sepals glabrous within and without. 



Leaf-blades 2-3 cm. long; sepals 8-10 mm. long. 18. /. calva. 

 Leaf-blades 7-13 cm. long; sepals 10-12 mm. 

 long. 19. /. wolcottiana. 



11. Ipomoeafistulosa Mart.; Choisy in DC. Prodr. 9: 349. 1845. — 

 Meissn. in Mart. Fl. Bras. 7: 239. pi. 81. 1869.— Rose, in 

 Gard. & For. 7: 366. 1894.— Small, Fl. Southeastern U. S. 

 963. 1903. 



Batatas crassicaulis Benth. Bot. Voy. Sulphur 134. 1844. 

 Ipomoea texana Coulter, Contr. Nat. Herb. 1: 45. 1890. 



Type locality: Brazil. 



Distribution: Southern Mexico to Central America, Brazil and Peru, 

 chiefly along rivers near the coast. Adventive northward to Texas and 

 South Carolina. 



Specimens examined from South Carolina, Texas, Vera Cruz, Chiapas, 

 Acapulco, Tepic, Guatemala and Nicaragua. 



; 12. Ipomoea glabriuscula House, Bot. Gaz. 43: 409. 1907. 



Resembling the preceding, but glabrous; leaf-blades ovate, shallowly-cordate, 

 minutely pubescent beneath; peduncles 4-12 cm. long; sepals unequal, the inner 

 6-7 mm. long; corolla white, glabrous or nearly so without. 



Type locality: Guatemala. 



Distribution: Guatemala. 



Specimens examined: Heyde, 1892 (type — N, 266072). 



^13. Ipomoea nicaraguensis House, Bot. Gaz. 43 : 409. 1907. 



Ipomoea fistulosa var. nicaraguensis Donnell Smith, Bot. Gaz. 19: 256. 1894. 



Twigs velvety-canescent; leaf-blades broadly ovate or reniform-ovate, velvety- 

 canescent beneath, acute, shallowly cordate, 7-12 cm. long; sepals broadly ovate, 

 rounded, minutely tomentose, 7 mm. long; corolla pink or whitish, tomentose with- 

 out on the plicae and tube. 



Type locality: Rio de las Lajas, Nicaragua. 



Distribution: Central America. 



Specimens examined: W. C. Shannon 5026, 1893 (type — N). 



