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IX. An Enumeration of the Plants of the Galapagos Archipelago; with De- 
_ scriptions of those which are new. By. Josern Darron Hooktn, Esq., 
M.D., F.L.S. Sc. &c. 
Read March 4th, May 6th, and December 16th, 1845. 
Fon the materials upon which the following Flora of the Galapagos Islands 
bas been constructed I am mainly indebted to Charles Darwin, Esq., who 
formed a collection of plants in that group during the voyage of H. M. Ship 
‘Beagle. On my return from the Antarctic expedition, I expressed to that 
gentleman a wish to examine the botanical results of Captain Fitzroy's 
voyage, and to incorporate the plants with my own * Flora Antarctica, and 
through his kindness the collections in question were liberally given over to 
me by Professor Henslow of Cambridge, in whose charge they had been 
placed for the University. Mr. Darwin drew my attention to the striking 
peculiarities which mark the Flora of the Galapagos group, and to the fact 
that the plants composing it not only differ from those of any other country, 
but that each of these islands has some particular productions of its own, 
often representatives of the species which are found in the others of the 
group. 
My first attempt to give any clear exposition of these features in the 
vegetation was frustrated by the novelty of the species themselves, forbidding 
any direct comparison of the Flora with that of adjacent countries. A clear 
determination of the plants themselves was indispensable; and I have now 
the honour of laying before the.Society the names of the species, with descrip- 
tions of what have proved to be new, and some notices as to the ranges of 
others previously known. I must here beg to acknowledge the assistance I 
received from Professor Henslow, by whom the investigation of the species 
was commenced. These, together with some others collected by various voy- 
agers, though perhaps composing but a small proportion of the Flora of the 
VOL. XX. x 
