103 



Hymenophyllum Wilsoni Lycopodium selaginoides 



Lycopodium alpinum Isoetes lacustris 



Equisetum variegatura and Lastraea rigida being subject to a doubt, 



as previously expressed. 



M. Wirtgen observes that the entire number of species occurring 



in middle and northern Germany, from the Donou to the east and 



north sea, amounts to fifty-seven : for the complete Rhine Flora the 



following species may be added : — 



Equisetum variegatum Asplenium viride 



trachyodon Botrychium matricariaefolium 



Adiantum Capillus-Veneris rutaefolium 



Allosorus crispus Lycopodium alpinum 



Polypodium alpestre Selaginella spinulosa 



Lastrasa rigida helvetica 



In the fertile province of Silesia five other species occur : — 

 Cystopteris regia Lycopodium complanatum 



Woodsia hyperborea and 



Asplenium fissum Salvinia natans 



The whole of these are absent from the British Flora, unless the 

 Low Layton plant is referrible to the first. The said plant illustrates 

 the extreme tenacity with which ferns cling to a station in which 

 they have been once established. In 1845, a gentleman wrote a note 

 for publication in these pages, (Phytol. ii. 291) announcing that the 

 plant "had been dead some years;" and adding, "By making this 

 known you may save botanists a fruitless search, and the polite pro- 

 prietor of the house will be relieved from many inquiries." We have 

 not the honour of knowing the writer, Mr. Frederick Barham, but we 

 presume that he knew the locality ; and although he is in error in 

 stating the plant had been dead some years (it having been gathered 

 every year), yet it is obvious that it was not sufficiently conspicuous 

 for him to detect it when he visited the spot in August, 1845. Two 

 months later, that is, in October, 1845, it was green and vigorous as 

 evei\ K. 



Further Remarks on Plants excluded from the Second Edition of 

 the ' London Catalogue? By F. P. Pascoe, Esq. 



Mr. Sidebotham having directed attention to the " Excluded Spe- 

 cies" of the 'London Catalogue' in the last number of the ' Phy- 



