24 TRANSACTIONS OF THE [Sess. lxxxiv 



the records have been published. These records are 

 principally contained in " A Tour through some of the 

 Islands of Orkney and Shetland," in the year 1804, by 

 Patrick Neill (1806); "Notice of some of the rarer Plants 

 ol:jserved in Orkney during- the Summer of 1849," by John 

 T. Syme, Esq., published in the " Transactions of the 

 Botanical Society of Edinburgh," vol. iv, pp. 47-50 (1850) ; 

 "Florula Orcadensis — A list of plants reported to occur 

 in the Orkney Isles," by H. C. Watson, Esq., F.L.S., 

 published in the "Journal of Botany," No. xiii, pp. 11-20 

 (January 1864) ; Annual Reports of the Botanical Exchange 

 Club of the British Isles ; " A new List of the Flowering 

 Plants and Ferns of Orkney,'' edited by W. A. Irvine 

 Fortescue, and published in " The Scottish Naturalist " 

 (1882-1884) ; " Supplement to Topographical Botany, 

 ed. ii," by Arthur Bennett, A.L.S. (1906); and "Flora 

 Orcadensis," by Magnus Spence, F.E.I.S. (1914). 



The nomenclature followed is that of the second edition 

 of Watson's "Topographical Botany" (1883), except in 

 the case of species and varieties which are not recorded in 

 that Avork. In the latter case the nomenclature adopted 

 is that of " The London Catalogue of British Plants," tenth 

 edition (1908). Non-native plants, which have become 

 naturalised in Orkney, are distinguished by a * prefixed 

 to the names, and the names of casuals are printed in 

 italics. 



Of the 54 species and varieties recorded from Orkney in 

 the following list, 86 are native, 6 are naturalised, and 12 

 are mere casuals introduced into Orkney through the agency 

 of cultivation. 



Abbreviations. 



"Annals Scot. Nat. Hist." = The Annals of Scottish Natural His-tory. 



Bennett, "Siippl. Top. Bot." = Supplement to H. C. Watson's Topo- 

 graphical Botany, second edition. By Arthur Bennett, A.L.S. 

 (1905). 



"Bot. Exch. Club Report" (separate Reports \)y the Secretary and 

 Distributor) = Report of The Botanical Exchange Club of the 

 British Isles, at jjresent called 'J'he Botanical P'xchange Club and 

 Society of the British Isles 



"Journ. Bot.'' = The Journal of Botany. 



" Lond. Cat." = The London Catalogue of British Plants. 



Neill, "Tour " = A Toui' through some of the Islands of Orkney and 

 Shetland, in the yeai' 1804. By Patrick Neill, A.M., Secretary 

 to the Natural History Society of Edinb-urgh (1806). 



