BOTANT OF FERNANDO NOBONHA. 47 



The Sweet Potato is cultivated in many parts of the main island 

 aud has run half wild in many spots ; but it is most abundant on 

 Eat Island at the place covered with guano. Here it is very 

 profuse, owing to the richness of the soil ; and the main island is 

 supplied with the tubers from this spot. 



Ipomcea digitata, L. Sp. PI. p. 228 ; Meissn. in Mart. Fl. 

 Bras. vii. p. 278. — Batatas paniculata, Choisy, Conv. Or. p. 54. 



Tolerably common in spots in the central district, growing 

 among the Leguminosse, 



Distribution. Throughout the tropics. 



I. PENTAPHTLLA, Jacc[. Coll. Bot. \\. p. 297 ; Ic . PI. Bar. ii. 

 p. 319. — Convolvulus pentaphylla, L. Sp. PI. ii. p. 223 ; Meissn. 

 in Mart. Fl. Bras. vii. p. 287. 



This Convolvulus was very common in the central district of the 

 main island, and also in Rat Island. 



Distribution. Over the whole world. 



Jacquemontia eueicola, n. sp. 



Herba prostrata vel suberecta, ramosa pubescentia glauca un- 

 dique tecta. Folia cordata ovata acuta, 2 uucias longa, Ii uncias 

 lata, petiolus uncialis. Flores congesti in capitula parva, pedun- 

 culis 2-uncialibus suberectis axillaribus et subterminalibus. 

 BractesB plures, lanceolatse acutse, circiter ^-uuciales. Sepala 5, 

 pubescentia valde insequalia 2 ovata lanceolata acuminata 5-un- 

 cialia, 3 minora ovata acuta. Corolla campanulata f unciam 

 longa, pallide azurea, g unciam in diametro. Stamina 5, pistillum 

 haud superantia. Anthera ovalis, loculis hand disjunctis. Ova- 

 rium conicum obtusum. Stylus gracilis rectus ; stigma bilobum, 

 lobis ovalibus. 



Eat Island, southern side ; main isle, on the southern side, 

 from near San Antonio to Tangle Bay, growing on open spaces 

 facing the sea. 



A very pretty delicate lavender-blue Convolvulus, almost white 

 at times, with stem aud leaves covered with a close grey 

 pubescence. 



CuscTJTA AMERICANA, L. Sjp. PI. p. 180 ; Jacq. Amer. p. 24 ; 

 Meissn. in Mart. Fl. Bras. vii. p. 376, t. cxxvi. fig. 1. 



Not rare on the main island ; parasitic on Cucumis Anguria, L., 



