115 



ASPLENIUM MARINUM, Var. Interruptum. 



MONKMAN, MS. 



PLATE XLVIH. — A. 

 Asplenium — Spleeiiwort. Marinum — Sea. Inierr upturn — Interrupted. 



This plant was found along with the variety trapeziforme, 

 (of which it is a sport,) some five or six miles north of 

 Scarborough, on the high moorland cliff of that very wild part 

 of the Yorkshire coast. 



Like Asplenium marinum, var. trapeziforme, the variety 

 interruptum has a somewhat more dwarf habit than that of the 

 normal form of the species. It is thick and leathery in texture, 

 whilst in general outline it is exactly analogous to Oystopteris 

 interrupta. 



Length of frond nine or ten inches; breadth in the normal 

 parts one inch and a half to one inch and three quarters. 



The pinnse are very irregular in form, some being much 

 depauperate, occasionally a mere midrib, and frequently wanting. 



Every frond vaiies, usually about half the pinna is of the 

 type of the variety trapeziforme. 



The venation resembles that in the normal form, except in 

 being confused in the depauperate portions, as is always the 

 case. Fertile. 



For fronds my thanks are due to Mr. C. Monkman, of Malton, 

 Yorkshire. 



