A CONTRIBUTION TO A FLORA OF ST. KILDA 241 



Pannaria plumbed^ Lightft. On Ruadval. 



Ochrolechia parella (L.), Mass. 



Aca rospora fuscata (Schrad.), Th. Fr. On the rocks of cleits. 



Biatora lucida (Ach.), Th. Fr. On the rocks of cleits. 



Rhizocarpon geographicum (L.), Dl. On the rocks of cleits. 



The orchis O. maculata which occurs on the^banks of 

 the stream interested me during my visit. It is usually 

 pollinated by bees, but as no bees have yet been discovered 

 in St. Kilda, the flowers of that island have to depend on 

 other insects for pollination. Quite accidentally one morning 

 a dipterous fly, an Anthomyia, I believe, settled on my 

 hand ; upon its head I noticed two pollinia of 0. maculata, 

 but before I was able to capture it, it flew away. O. maculata 

 is no doubt dependent on the visits of flower-haunting flies 

 and other insects in this island, where the hum of the bee 

 has not yet been heard. 





 THE UNIVERSITY, MANCHESTER, August 1907. 



THE NOMENCLATURE OF BRITISH PLANTS. 

 By GEORGE CLARIDGE DRUCE, M.A., F.L.S. 



IN my paper on the " Nomenclature of British Plants " which 

 appeared in the "Annals" for October 1906, but which 

 unfortunately I had no opportunity of seeing in proof, so 

 that numerous misprints occur, I made some suggestions of 

 a tentative nature as to certain changes which, if the Vienna 

 " Actes " were followed, might have to be made in the 

 names of our British plants. These were based upon the 

 arrangement and limitations of Bentham and Hooker's 

 "Genera Plantarum." In 1907 Rendle and Britten issued a 

 "List of British Seed-Plants and Ferns," in which the compilers 

 adopt the sequence and generic limitations of Groves's edition 

 of" Babington's Manual of British Botany," which differs con- 

 siderably from those used by Bentham and Hooker. 



In this List about seventy of the names suggested by 

 me in the foregoing paper are also used, so that, working 

 independently, it is pleasing to find that agreement in the 

 64 E 



