246 



LASTREA riLlX-MAS. 



monstrous development, having every season sliown more or 

 less divergence from the normal form fpaleacea.J The form 

 sent was found at Castle Howard, and is a combination of 

 ramosa, interrupta, depauperata, and furcans, and has no two 

 fronds alike. Occasionally the most inconceivably odd fronds 

 are developed. In the Lake district, and especially in the 

 lanes about Morecambe and Lancaster, great numbers of 

 Lastrea Jilix-mas similarly affected have been found; but, 

 although scores have been gathered of the best marked plants 

 (apparently,) I have never found any except the Castle 

 Howard form to remain permanent. There is this to notice — 

 the Castle Howard group was of the paleacea type: the 

 Lancashire and Lake plants were not. 



FiR. 194.— Pinna. 



Incisa, Moore. (Fig. 194.) — A common form, found in 

 Somersetshire, Devonshire, Dorsetshire, WiUshire, Sussex, Surrey, 

 Hertfordshire, Bedfordshire, Northamptonshire, Norfolk, Here- 

 fordshire, Worcestershire, Nottinghamshire, Derbyshire, Lanca- 

 shire, Cumberland, Durham, Northumberland; the Channel 

 Islands, and in Ireland and Scotland, but not commonly met 

 with in these countries. I have found this form abundant at 

 Chaigeley Manor, near CHtheroe; Browsholme Llall, Lancashire; 

 at Barnard Castle, in Durham; at Tynemouth and Whitley, 

 Northum.berland ; at Ashton-on-Mersey ; Matlock, Wollaton, 

 and at Stanton-on-the-Wolds, Nottinghamshire. Length of 

 frond from three to six feet. A most robust and highly- 

 developed form of stately habit. Lanceolate, bipinnate, and 

 not abruptly contracting near the apex. Pinna; elongate 



