BOTANICAL GEOGRAPHY. 469 



The genera treated of in the first part, the indigenous ones, are the follow- 

 ing : Ranunculacese : Anemone, 7', Hamadryas, 2 ; Barneoudia, Ranunculus, 18 ; 

 Psychrophila, 4 ; andPceonia. Magnoliacese : Drymis, 2. Anonacese : Anona, 1- 

 Lardizabaleoe : Lardizabala, 2 ; and Boguila, 1. Berberidese : Berber is, 23. 

 Papaveracese : Argemone, 3 ; and Papaver and Fumaria, 1. 



V._ AUSTRALIA AND THE SOUTH-SEA 

 ISLANDS. 



J. D. Hooker opposes the opinion that all or most of 

 the South-Sea Islands belong to the same primitive 

 formation (Lond. Journ. of Bot., 1845, p. 642). 



The resemblance of their vegetation is rather apparent than real, and is 

 principally evidenced in littoral plants, and in those which with man have 

 migrated beyond their native country towards the East. However, that the 

 original vegetation, with which those naturalized have become associated, is 

 endemic to the larger groups of islands, at least, is shown by a comparison of 

 the flora of the Sandwich and Society Islands, for instance, both of which 

 are subject to the same climatal conditions ; one being situated north, and the 

 other south of the equator. Tew only of the prominent genera are found in 

 both groups. The Society Islands are the poorest, but tropical in their 

 forms, and less peculiar : here the extensive families of the torrid zone pre- 

 dominate, as the Malvacese, Leguminosse, Apocynese, Urticacese, Melasto- 

 macea3, and the Myrtacese. Of the forms peculiar to the Sandwich Islands, 

 the Synantheracese, Lobeliacese, Goodenoviacese, and Cyrtaridracese, few or 

 no representatives are found. Other families, as the Grasses, Euphorbiacese, 

 Rubiacese, &c., which are numerous in both Archipelagos, occur for the most 

 part in isolated species. The same view of the endemic character of the 

 Flora of the Sandwich Islands is adopted by Hinds. (Ann. Nat. Hist, xv, 

 pp. 91-3.) With other Floras and those of the most different kinds, isolated 

 points of resemblance only can be shown. Of 165 species which the traveller 

 collected upon the coast there, half are endemic. In a physiognomical point 

 of view the amount of forests is small in comparison with that of other tro- 

 pical countries, the trees are not tall and only crowded in moist sheltered 

 valleys. Cinchonaceae, Guttiferae, Sapindacese, Euphorbiaceae, are found there, 

 mixed with Tree-Ferns, and a single Palm which was originally endemic. 



The work of Strzelecki upon New Holland contains a 

 number of valuable details on the conditions of the vege- 

 tation of this continent (Physical Description of New South 

 Wales and Van Diemen's Land. London, 1845, 8vo). 



The extra-tropical south-eastern coast is exposed pretty uniformly to 



