HOUSE, THE GENUS IPOMCEA 205 



Type locality : St. Croix. 



Distribution : Thickets near the coast, West Indies and the gulf region 

 of Mexico, Central America to Brazil. 



Illustrations: Bot. Reg. p/. 55. Meissn.; Mart. Fl. Bras. 7: 'pl.78. 

 Specimens exajviined: Cuba; C. Wright 1647, 1859 (G). 



44. Ipomcea learii Paxton, Bot. Mag. 6 : 267. 1839. 



Pharbitis learii Hook. Bot. Mag. pi. 3928, 1841.— Lindl. Bot. Reg. pi. 56. 1841.— 

 Choisy in DC. Prodr. 9: 343. 1845.— Fletcher in Bailey's Cyclop. Am. Hort. 

 819. 1900. 



Closely resembling /. vahliana, and perhaps identical; stems finely pubescent 

 and tomentulose; leaf-blades glabrous above, finely pubescent beneath with pale 

 hairs; peduncles capitately 3- to 9-flowered; bracts linear, 12-20 mm. long; sepals 

 linear-lanceolate, 18-22 mm. long, minutely pubescent with appressed silvery hairs; 

 corolla 5-6 cm. long, blue, turning rosy in age, the tube white below. 



Type locality: Said to come from Ceylon by Paxton, but Lindley (I.e.) 

 says that to be a mistake. The species is common in cultivation, and only 

 the following herbarium specimens can be referred here. 



Guatemala; C. C. Deam 316, 1905 (G). Costa Rica: Pittier 16277, 

 1902 (G). 



45. Ipomoea cathartica Poir. Encyc. Suppl. 4: 633. 1816, — Griseb. 



Fl. Br. W. Ind. 473. 1861. 



Convolvulus africanus Nicolson, Hist. Nat. St. Dom. 260. 1776. 



Convolvulus pudibundus Lindl. Bot. Reg. pi. 999. 1826. 



Iponioea pudihunda G. Don, Gen. Syst. 4: 276. 1838. 



Pharbitis cathartica Choisy in DC. Prodr. 9: 342. 1845. 



Ipomoea fastigiata Chapm. Fl. Southern States 344. 1860. Not I. fastigiata Sweet. 



Glabrous or nearly so; leaf-blades entire to deeply 3-lobed; sepals glabrous or 

 nearly so, lanceolate, attenuate, 15-20 mm. long, appressed to the corolla-tube, 5- to 

 7-nerved at the base; corolla sometimes white. 



Type locality: St. Domingo. 



Distribution : Thickets in sandy or calcarious soil, peninsular Florida, 

 Bermudas, Bahamas and West Indies, gulf region of Mexico, Central and 

 tropical South America. 



7. Cissoides. 

 One species: Corolla small, white. 46. I. cissoides. 



