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HISTORY OF BRITISH FERNS. 
Genus 9. SCOLOPENDRIUM, Smith. 
1. S. vulgare, Symons .—The only British species. Fronds 
strap-shaped, entire. Plate XV. fig. 1. 
mr. polyschides. — Fronds long, narrow, irregularly 
lobed, fertile. 
mr. marginatum.—Fronds long, narrow, lobed, with a 
double, i.e. split margin, fertile. 
mr. crispum.—Fronds elongated, much undulated at 
the margin, usually barren. 
mr. multifidum.—Fronds usually shortened, multifid 
and tasselled at the apex ; barren or fertile. 
mr. laceratum.—Fronds broad, short, with the margin 
lobed, the lobes multifid-crisped; fertile. 
Polypodiace,® § Lomarie^:. 
Genus 10. BLECHNUM; Linnaeus. 
1. B. Spicant, Roth .—The only British species. Plate 
XVI. fig. 2. 
mr. ramosum.—Fronds branched, the extremities of 
the branches tasselled. 
