Moss; Changes in the Halifax Flora. 



I take it that the following species in the list, which I shall 

 assume to be Bolton's, are errors: the plant which I think 

 Bolton actually had in mind I also give. 



Plant Mentioned by Bolton. 



Plant I Think He Meant. 



' 32* CEnanthe fistulosa.' 



CEnanthe crocata L. 



'42 Colchicitm autumnale.' 



Crocus nudiflorus Sm. 



'82 Potent ilia argentea.' 



? Potentilla rep tans L. 



1 141 Trifolium subterraneiim.' 



? Trifolium dubium Sibth. 



' 143 Hypericum mo?itanum.' 



? Hypericum quadratum Stokes. 



1 145 Lactuca saligna.' 



? Lactuca muralis Fr. 



'150 Cardials acaulos.' 



Carlina vtilgaris Benth. 



' 168 Orchis us tu lata.' 



? Habenaria conopsea Benth. 



'169 Orchis militarist 



? Habenaria viridis R.Br. 



' 180 Salix reticulata.' 



? Salix aurita L. 



' 191 Acrostichum [Lastrtza] 



Lastrcea Oreopleris Presl. 



thelyptere. ' 





Bolton seems to have been misled by Hudson's Flora in the 

 case of the first two and the last of these records. Of the rest, 

 excepting Carlina, there will always probably remain some 

 doubt as to what precisely was meant. The grounds on which 

 I base my opinions are in man}' cases irrelevant to the imme- 

 diate purpose in hand ; where not so I give them further on. 



It is likewise desirable to point out the introduced plants, as 

 it is difficult to draw significant conclusions from such plants. 

 They are introduced either on account of their beauty or their 

 medicinal virtue — supposed or real — while they are often soon 

 eradicated for precisely the same reasons. 



The following introductions now appear to be extinct : — 

 ' 19 Polemonium ccernleum,' '22 Vinca,' '37 Xarcissus poeticus,' 

 '51 Daphne laureola,' '87 Chelidonium majus,' '124 Geranium 

 pere?ine , = G. pyrenaicum Burm. fil., '64 Viola odorata' \ while 

 '70 Sempervivum tectoriiun' and '118 Cochlearia armoracia' 

 remain in suspicious stations. 



The rest appear to be more or less probable natives or 

 colonists, together with a few casuals which I shall ignore ; 

 and I now proceed to classify them in such a way as to offer 

 matter for the elucidation of the question under discussion. 



I. The first class includes those plants which have dis- 

 appeared or almost disappeared since 1775, owing to the 



,r The numbers are those which appear in Bolton's lis*:. I retain them to 

 facilitate reference. The spelling- is also Bolton's. 



Naturalist, 



