238 Dr. J. D. Hooker on the Vegetation 
closely related to one another. Associated with these are trees of mcd 
Leguminose, Psidium, Psychotria, Chiococca and Clerodendron, all tropical in 
appearance, accompanied by others no less characteristic either of a warm 
and equable temperature, humid atmosphere or wooded region; such are the 
genera Passiflora, Viscum, Ipomeea, Epidendrum and Peperomia, with the great 
majority of the Ferns, and all the Jungermannice and Musci that have been 
collected on the group. 
The naturalists who have explored this archipelago are very few in num- 
ber, and as all have added more or less to a knowledge of its botany, I shall 
mention their names in the order of the date of their respective visits. Mr. 
Hugh Cuming in 1829 paid a very short visit to the islands. The late David 
Douglas and Dr. Scouler touched at James’s Island on their way to the 
Columbia River. Mr. Macrae landed on three of the islets when employed 
in collecting by the Horticultural Society, and formed a rather considerable 
herbarium. In 1835, Mr. Darwin spent some weeks in the archipelago, 
visited four islets, and formed the excellent collection of upwards of 200 
species which forms the groundwork of this essay. Admiral Du Petit Thouars 
collected a few plants in one island only, for specimens of which I am in- 
debted to the kindness of M. Decaisne of Paris,.and very recently one*of the 
Galapagos group was the last place explored by the lamented Mr. Edmonstone 
in the winter of 1845. His herbarium is second to that of Mr. Darwin in 
numbers, and contains several plants which are not in any of the others. The 
total number of species brought together from these various sources amounts 
to 265, of which 225 are flowering plants, and 28 Ferns. The other orders 
of Cryptogamia have not been attended to by any collector: of these there are 
2 Musci, 6 Hepatic, 3 Lichens and a Fungus. All the above, except per- 
haps 17, natives of Charles, the only inhabited island, are truly indigenous to 
the group: but that this is only an approximation to the real number of 
species inhabiting the archipelago is probable from the circumstance of only 
40 of these having been collected by more than one of the six collectors whose 
herbaria I have examined. 
Under any circumstances it appears that the Flora of the Galapagos is 
an exceedingly poor one when compared with that of other tropical islands 
of their own or even less extent. Thus the Cape Verds, scarcely so well 
