BOTANICAL RKPORT. 377 



Cystopteris fragilis, ?)oriih. Gracki-cattle Moor, Z. A. 31. 

 liiJey. 



Lastraea Oreopteris, Presl. Newquay, C. C. Jlgurs. 



Polypodium vulgare, Linn., var. serratum, Willd. 

 Remarkably line plants in the woods at Prideaux Place, 

 Padstow, J. D. Enys. Mr, Enys brought nie beautiful fronds 

 nearly three feet in length. 



Equisetum maximum, Lam. Goran, C. C. Vif/itrs. 



Chara fragifera, Durieu. Mabe Reservoir, F. If. Davey. 

 An addition to the range of a very rare plant. 



Nitella translucens, Agardh. Not uncommon in the 

 deeper parts of Mabe reservoir, /''. H. Davey. 



i. EXCLUSIONS. 



On two previous occasions* a total of forty-eight plants 

 were shown to have been wrongly reported for Cornwall. With 

 several it would have been a sheer waste of time to discuss even 

 the possibility of their occurrence ; from the first it was obvious 

 the recorders were misled. Where there was the slightest 

 suggestion of doubt about a species, I carefully followed the 

 trail of evidence that had been offered in its favour, until a clear 

 case was made out for its exclusion. Much of this work involved 

 a lot of tedious search through herbaria and books, but the 

 labour was justified by the results. Only those who have 

 collected material for a County Flora can fully understand how 

 easy it is to be misled, even by the best-intentioned persons. 

 The first duty of a compiler of a local flora is to test every record 

 to which the least shadow of doubt attaches, especially when 

 dealing with segregates and other critical species. This I have 

 continued to do, and twelve more species must now be placed in 

 the list of exclusions. 



Silence COnica, Linn., was first recorded by me as a native 

 of Cornwall on the authority of Mr. W, N. Winn, who reported 



it for " Cliff fields near the Lizard, "f At my request, Mr. Winn 

 has recently re-examined his specimens, and he admits there 



* See Journal R.I.C., vol. xvi, 66 and 250. 

 tSee Journal R.I.C., vol. xiv, 371. 



