Feb. 1903.] BOTANICAL SOCIETY OF EDINBUEGH 277 



district should be noted, along with any noteworthy yaria- 

 tiou of frequency. Such notes are of peculiar interest 

 with reference to iramisfrauts. 



Topographical Botany of the PayEu-BASiNs Foeth 

 AND T\yEED IX Scotland. By James W. H. Trail. 



(Read 12th February 1903.) 



The following brief outline of the progress of botanical 

 investigation in the basins of the rivers Forth and Tweed 

 (in Scotland), and the abstract of county-distribution of 

 their floras, in so far as I have been able to ascertain it 

 up to 1903 from published records and other sources of 

 information, have been prepared in the hope that they 

 may be found useful to field botanists in the south-east 

 of Scotland, and may help towards the preparation of such 

 a record of the Scottish flora as is much to be desired. 



The counties included are Berwick, Eoxburgh, Selkirk, 

 Peebles, Haddington, Edinburgh, Linlithgow, Fife and 

 Kinross, Stirling, and Perth and Clackmannan within 

 the basin of the Forth. Parts of Fife and Stirling lie 

 outside the basin of the Forth ; but it is not possible, 

 from the information within my reach, to determine from 

 the records of the several plants published for these 

 counties whether they refer only to parts of the counties 

 beyond the Forth valley or to it also. Thus under these 

 counties may be included a (very) few species not found 

 in that valley. It has seemed more likely to be of use 

 to include all species known to me to have been recorded 

 for any of these counties, whether truly indigenous or 

 introduced originally by man. In the floras and lists that 

 enumerate the plants of the counties, there are too often 

 no indications of whether the various plants are indigenous 

 or aliens, and such information as is given is at times 

 apparently misleading. I have sought, as far as my 

 knowledge of the flora of Scotland would allow, to indicate 

 which must be regarded as aliens (marked +), introduced 

 intentionally or unintentionally by man. Attention has 

 been drawn to the many defective records, especially for 



