LASTREA FILIX-MAS, 



569 



BiSERRATA, Moore. — Found by Mr. S. Appleby, at Rossington, 

 near Doncaster. A sub-variety of tncisa, having large, oblong, 

 blunt, adnate, semi-decurrent pinnules, having serrate-crenate 

 lobes, producing a conspicuous biserrate margin. The upper 

 basal pinnules deorsely-lobate. 



Fig. 219.— Frond. 



MoNKMANii, Loice. (Fig. 219.) — A. curious monstrosity, 

 found by Mr. C. Monkman, of Malton, in 1863, growing from 

 beneath the platform at the Hornby railway station, near 

 Lancaster. The pinnae are extremely abbreviated, scarcely bi- 

 pinnate, many being mere lobes. Every part of the plant is 

 remarkably irregular. The pinnae are very coriaceous, and 

 papillose, some marginate; giving to the fronds a peculiarly 

 rough aspect. So far there is no sign of fertility. When 



2 N 



