11 :
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I ti
ASPLENIUM MARINUM, V a k . I x t e r r c p t u m .
M o x k m a n , MS.
P L A T E X L V l l l . A .
Asplenium— S l t l e e u w o r t . Marinum— S e a . Inierruptum— I i l t c i T u p t e d .
T h i s plan t was found along with the variety trcrpezforme,
(of which it is a sport,) some five or six miles north of
Scarborough, on the high moorland cliff of th a t very wfild 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. I t is thick and leathery in texture,
whilst in general outline it is exactly analogous to Cijstopte.ris
interrup/ta.
L ength of frond nine or ten inches; breadth in the normal
parts one inch and a half to one inch and three quarters.
The pinnæ are very irregular in form, some being much
depauperate, occasionally a mere midrib, and frequently Avauting.
Every frond varies, usually about half tho piuna is of the
type of the variety trapeziforme.
The venation resembles th a t 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,
Y^orkshire.