30 



POPULAR HISTORY OF LICHENS. 



foot ; the ' Flora Edinensis ' of Greville, one of the first of 

 British cryptogamists ; the ' Elora Hibernica ' of Mackay ; 

 and the monographs on the British Angiocarpous Lichens 

 and on the British Graphideoe, lately published by Leighton. 

 The works of the latter author have the merit of being the 

 first British works to contain descriptions of the spores of 

 native species ; his monograph on the Angiocarpi is indeed 

 based upon or " elucidated by their sporidia." The ground 

 has thus been broken in Britain for a more philosophic 

 study of Lichenology than heretofore ; but much remains 

 to be accomplished, — the field is open, the harvest promises 

 to be bountiful. Nor must we here omit to mention the 

 labours of our facile botanicorum princeps, Robert Brown, 

 in the description of Arctic species collected in the voyages 

 of Parry and Scoresby ; or of Churchill Babington in the 

 lichenographical department of the magnificent floras of 

 New Zealand, the Antarctic regions, etc., recently published 

 by Dr. J. D. Hooker, the distinguished son of a distinguished 

 sire. North American Lichens have been described by 

 Halsey, Torrey, and Tuckerman ; those of Chili by Ny- 

 lander; those of Brazil by Eschweiler; and the collection 

 and description of species from other and more distant parts 

 of the world, within the last few years, serve to corroborate 



