302 SCOI-OPENDRIUM VULGARE. 



upper half of the frond being finely fimbriated, usually biden- 

 tate, except at the apex. 



I'ndulato-bifurcum, Lowe. — Length twelve inches, slightly 

 undulate, thin, four inches below the apex furcate, and one 

 inch higher again furcate. 



Undatum, Padley. — Found near Littleham by the Rev. C. 

 Padlcv. Length eleven inches, width one inch and a quarter. 

 Nearly uniform or strap-shaped. Rounded at the base and 

 subcornute at the apex. The undulations more like waves, a 

 quarter to half an inch apart, then crisped or undulated. I 

 am indebted to the Rev. C. Padley for fronds. 



Imbricato-contractum, Clapham MSS. — A broad form with 

 an irregular outline. Slightly undulate, lobate and imbricated. 

 The centre of the frond contracted, but not excessively so, and 

 where contracted densely denticulate. Apex blunt, except when 

 minutely denticulate, then blunt with an abruj^t attenuation. 



MuKiCATo-CRispuM, Lowc. — A pretty dwarf form. Fronds 

 eight inches in length, widest at the base, and gradually tapering 

 to the apex. Muricate on the upper surface, within which to 

 the costa smooth, without the muricate belt beautifully crisj)ed. 

 Copiously sorifcrous, except near the base, and also supraso- 

 riferous near the apex. 



MucRONATUM, TVilldenoic. — Raised from spores by Mr. A. 

 Clapham, of Ramsdale Bank, Scarborough. Fronds dwarf, the 

 lamina from one to three inches in length, and less than an 

 inch broad. Base subcordatc, uniform in width throughout 

 the frond, the apex bluntly rounded. Margin undulate and 

 denticulate, the costa excurrent, forming a horn which projects 

 from the ujiper surface. Fronds sterile. 



Deorso-cristatum, «SVm. — Length twelve inches, width on(> 

 inch, scarcely spreading, strap-shaped, forked near the apex, 

 the forkings turning down and crossing each other, their apices 

 crispy, much cut, and compact. 



