974 



St. Aubin's, and in several places near St. Lawrence. In one spot 

 near the last-named place, it grows plentifully for a very considerable 

 distance along a hedge-bank, extending as far as the bank is exposed, 

 but ceasing exactly where the lane is shaded by trees. The accounts 

 tend to establish the plant as a true native of the island, and to remove 

 the idea of its intentional introduction. 



Pseudathyrium alpestre, and an allied Species. 



The President observed that since he had the pleasure of inviting 

 attention to the occurrence, in Scotland, of a fern previously unre- 

 corded as British, several very ardent and most acute botanists had 

 searched the districts indicated, and with complete success. The 

 result, however, was the discovery of, not a. single species alone, but of 

 two. Through the kindness of Mr. Backhouse, he had had the oppor- 

 tunity of examining an extensive and very beautiful series of each of 

 these ; and although in this early stage of the inquiry he by no means 

 wished to do more than indicate the more obvious distinguishing 

 characters, he considered it due to his friends to communicate to the 

 public the result of their researches. 



P. alpestre. Habit rigid. Frond lanceolate, suberect, 2-3 feet 

 long, bipinnate ; pinnae ascending, distant near the base, else- 

 where crowded, subacute ; pinnules 25-35 on each side of mid- 

 rib of pinna, wider at base, crowded, toothed ; clusters of cap- 

 sules 25 or more on each pinnule, crowded, Jinally conjiuent. 



Hah. " Canlochen Glen, Forfarshire," " Ben Aulder," " Mountains 

 near Dalwhinnie," H. C. Watson. " Lochnagar," " Head of Glen 

 Prosen, Clova mountains, Forfarshire," " Ravine of the White Water, 

 Clova mountains, Forfarshire," " Glen Fiahd, Clova mountains," 

 James Backhouse, James Backhouse, junr., Thomas Westcombe. 



P.Jiexile. Habit lax,jlexile Frond strap-shaped, spreading hori- 

 zontally, 8-18 inches long, bipinnate ; pinna? distant through- 

 out, horizontal or drooping, subobtuse ; pinnules 7-10 on each 

 side of midrib of pinna, narrower at base, distant, subobtuse, 

 serrated ; clusters of capsules 6-8 on each pinnule, distant, 

 always separate. 



Hub. " Micaceous rocks at the head of Glen Prosen, Clova moun- 

 tains, Forfarshire," James Backhouse, James Backhouse, jun., Tho- 

 mas Westcombe. 



