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THE VOYAGE OF H.M.S. CHALLENGER 



shall presently show, they by no means equal some insular species and many continental 

 ones. At p. 54 of Part II. the extreme heights that we have found for each species are 

 given, and the maximum is twenty feet ; and only three of them attain even this height. 

 It is quite probable, however, that the trees forming the dense woods of former times were 

 considerably larger. 



Juan Fernandez and Masafuera. 



Although these Composite are arboreous in habit, they are no more than miniature 

 trees, the extreme height of the tallest of them not exceeding twenty feet, we believe ; 

 and the average height of three of the larger species of Dendroseris is, or rather was — 

 for some of them are exceedingly rare if not extinct — according to Bertero, ten to fifteen 

 feet. We have treated Dendroseris as endemic, but there are imperfect specimens at Kew 

 of what may be a species of this genus from San Ambrosio. In addition to the genera 

 named above, there is a woody endemic species of the widely-spread genus Erigeron, 

 closely resembling a Bermudan endemic species. It is remarkable that the Mutisiacese, which 

 constitute more than a third of the numerous Chilian Compositse, are not represented in 

 Juan Fernandez, while the only member of this suborder hitherto collected in the Pacific 

 Islands is the Sandwich Island arboreous Hesperomannia. 



Chatham Islands. 



Of the six or seven certainly indigenous Composite in these islands, three are woody, 

 and two of them trees of considerable size. Euryhia traversii, F. Muell., an outlier of a 

 large Australasian genus of Asteroidese, differing very little structurally from Aster itself, 

 to which Mueller has recently reduced it, is a handsome tree, from thirty to thirty-five feet 

 high, with a trunk often four feet in girth, but almost always hollow, a character it has in 

 common with the Australian arboreous Euryhia argophylla. Euryhia traversii is generally 

 distributed through the woods of the Chatham Islands, though most abundant near the 

 sea. The second arboreous species, Senecio huntii, F. Muell., is a tree often attaining a 

 height of twenty-five feet ; it is rare in Chatham Island, but common in Pitt Island. 



