240 THE VOYAGE OF H.M.S. CHALLENGER. 



Morinda citrifolia, Linn. 



Morinda citrifolia, Linn.; Seem., El. Vit., p. 129; Nadeaud, Enum. PL Tahiti, p. 52; Jouan in 

 Mem. Soc. Sci. Nat. Cherbourg, xi. 1865, pp. Ill, 135, et 151 ; Mann in Proc. Amer. Acad., vii. 

 p. 170. 



Admiralty Islands. — One of the commonest seaside trees in Polynesia, and generally- 

 diffused on tropical coasts. 



Guettarda speciosa, Linn. 



Ouettarda speciosa, Linn. ; Seem., FL Vit., p. 131 ; Nadeaud, Enum. PL Tahiti, p. 52. 

 Gadamba jasminiflora, Sonnerat, Voy., ii. t. 128. 



Admiralty Islands. — Coasts of Tropical Asia, Eastern Africa and adjacent islands, 

 North-eastern Australia, and almost throughout Polynesia, though we have seen no speci- 

 mens, and it is not recorded from the Marquesas group by Jouan, nor from the Sandwich 

 Islands by Mann. It abounds in the Fiji, Samoan, Gilbert, Ellice, Friendly, and Society 

 groups, and it has also been collected in Radak and Eomanzoff Islands by Chamisso, iu Bow 

 Island by Barclay, in Pitcairn Island by Menzies, and in Elizabeth Island by Cuming. 



Psychotria turbinata, A. Gr. 



Psychotria turbinata, A. Gr. in Proc. Amer. Acad., iv. p. 45; Seem., FL Vit., p. 135. 



Admiralty Islands. — Also found in the Fijis. Psychotria is a genus of some 500 

 species, spread all over the tropics, and a few extend into subtropical regions; but the 

 greatest concentration of species is in America. In Western Polynesia the species are 

 numerous, and three and four occur as far east as Tahiti, while in the Fijis there are at least 

 thirty species ; but the genus does not appear to be represented in the Marquesas nor in the 

 Sandwich Islands. One endemic species inhabits Juan Fernandez. 



COMPOSITE. 

 Wedelia biflora, DC. 



Wedelia biflora, DC. ; Bcnth., FL Austr., iii. p. 539. 



Admiralty Islands. — As circumscribed by Bentham, this includes the Wollastonia 

 forsteriana, DC (Buphthalmum unifiorum, Forst.), and Wedelia insularis, DC, and 

 is spread nearly all over Polynesia, and in the maritime districts of Tropical Asia, Africa, 

 and Australia ; but there are several closely allied ill-defined species. One of these, 

 Wedelia strigulosa, is recorded by Seemann (Flora Vitiensis, p. 142) as common on all 

 the sea-beaches of the Fiji Islands. 



