ON THE PROTEACEjE OF JUSSIEU. 141 



tissime marginatis et apice brevissime alatis .- vel lignei, 

 mhrotundi, pseudo-bivalves basi tantum styli mucronati ; 

 seminibus undique alatis. 



This extensive genus, of which a few of the least 

 remarkable species have been already published as Em- 

 bothriums by Dr. Smith, Cavanilles, and others, I have 

 dedicated to the Right Honourable Chakles Francis 

 Greville, one of the Vice-Presidents of the Royal Society ; 

 a gentleman eminently distinguished for his acquirements 

 in natural history, and to whom the botanists of this 

 country are indebted for the introduction and successful 

 cultivation of many rare and interesting plants. 



Grevillea is probably the most extensive genus of Pro- 

 teacese in New Holland, and admits of division into several 

 very natural sections, most of which are readily distin- 

 guishable by more than one character, existing either in 

 the parts of fructification or in habit; notwithstanding 

 which, I have not ventured to separate them into distinct 

 genera, as I probably should have done, had I been ac- 

 quainted with fewer species ; but have given to each section 

 a proper name, a practice that may perhaps be advan- 

 tageously adopted in all large genera where they are thus 

 capable of natural subdivision. It must be unnecessary 

 to add that proper names can in this manner be given only 

 where the sections are perfectly natui-al, and not in those 

 cases where genera have been subdivided from single 

 characters, and those too of but little importance, as in 

 Thunberg's division of Protea, from the form and division 

 of the leaves ; to which may be opposed the masterly neg 

 subdivision of the same genus previously given by Linnaeus 

 in the Mantissa, whose sections, though apparently depend- 

 ing on single characters, are evidently formed from a con- 

 templation of the whole structure, as far as it was then 

 understood ; and it is remarkable that, with the exception 

 of the first species, with whose real structure he was neces- 

 sarily unacquainted, the rest are arranged, and even divided 

 into sections, in most cases corresponding with the genera 

 proposed in the present essay. 



