REPORT ON THE BOTANY OF JUAN FEKXAXDKZ AND MASAFUERA. 



21 



Out of forty-six genera of flowering plants represented in Juan Fernandez, twenty 

 are so generally diffused as not to be specially characteristic of any particular region, 

 north or south, east or west ; ten are endemic ; seven are otherwise restricted to South 

 America, or do not extend further north than Mexico; five (Drimys, Gfunnera, Pernettya, 

 Libertia, and Uncinia) are represented both in the Australian and South American 

 regions ; two (Coprosrna and Santalum) are represented in the Australian but not in the 

 South American region; and two (JBerberis and Piptoeltatium) have a wide range in the 

 northern hemisphere, extending southward, however, only in America, where the species of 

 the former eenus are numerous and diversified. 



The Vascular Cryptogams. 



Including Trichomancs dichotoma, Philippi, and Pteris semiadnata, Philippi =Pferw 



Hiaratticefolia, Hook., there are forty-four species of ferns in Juan Fernandez; but, as 

 stated elsewhere, authentic specimens of these two ferns, direct from Philippi, in the Kew 

 Herbarium, are labelled Valdivia, although with the published descriptions he records them 

 both as natives of Juan Fernandez. The probabilities are that the labels are right and 

 the published record wrong, for there are no specimens of either of them in the Kew Her- 

 barium from the island, but there are some of the latter from Chili. Be this as it may, the 

 fern veo-etation of Juan Fernandez is much richer in species than that of St Helena, which 

 comprises twenty-five species. On the other hand, the proportion of endemic species in 

 Juan Fernandez is much smaller than in St Helena, there being at the outside only eight, 

 or less than one fifth of the whole, whereas in St Helena half of the species are endemic. 

 Upwards of thirty of the Juan Fernandez species also inhabit South America, many of 

 them havin°- a much wider range, while only one of the New Zealand species reaches Juan 



