326 LASTREA ULIGINOSA. 



Found at Oxton Bog, NottinghamsTiire, by myself; also at 

 Wybunbury Bog, Cheshire; near Malton, Yorkshire, by Mr. 

 C. Monkman; Bawsey Heath, Wymondham Broad, and 

 Sur] Ingham, Norfolk; Newcastle-under-Lyne, Staffordshire; 

 Broseley, Shropshire. In Ireland at Killarney, and in Glen 

 Flesk, near Kenmare, Kerry. 



Caudex stout and decumbent. Fronds erect, linear-lanceolate 

 in form. Height from twenty-four to fifty inches; bipinnate at 

 the base of the pinnse. 



Fronds of three kinds. The first fronds fertile, quite erect 

 in growth, bipinnate; the basal pinnules distinct; pinnae 

 stalked, the upper surface turning towards the apex of the 

 frond. The second kind shorter and barren, small, spreading, 

 pinnate; pinnules oblong-obtuse and decurrent. The third 

 kind are produced later in the season, are sometimes barren 

 and sometimes fertile, the pinnules being broader and blunter, 

 and decurrent. 



Pinnae elongate-triangular, the lower ones broader, shorter, 

 and more oblique than those above them. 



The basal posterior pinnule is an inch in length, and the 

 basal anterior pinnule three quarters of an inch; in the 

 middle of the frond the basal pinnules are distinct, oblong, 

 acute, pinnatifidly lobed, the lobes having long, spinulose, or 

 aristate teeth; the upper pinnules adnate, and sharply and 

 profoundly serrate. 



Fructification most copious towards the apex of the frond. 



This Fern differs from Lastrea cristata in having in the 

 earlier fertile fronds more acute pinnules, and in being more 

 copiously lobed and toothed. 



Some few years ago I found it abundant on Oxton Bogs, and 

 in 1864 as a common plant at Browsholme Hall, the seat of 

 Capt. Parker. At Oxton it has promise of being preserved, as 

 the present proprietor, Mr. Henry Sherbrooke, is taking care 

 that it and Lastrea cristata shall not be destroyed. Mr. Monk- 

 man, of Malton, remarks that it grows with cristata in the Malton 

 district, also plentifully at Castle Howard, (but here there is not 

 cristata.) In 1857 Mr. Monkman found uliginosa growing with 

 Osmunda regalis on the west side of Derwent Water, near Kes- 

 wick. There were amongst them a few depauperated plants, but 

 he is not aware whether these will prove permanent varieties. 



