55 
A TABLE OP THE 
SPECIES AND VARIETIES OP BRITISH PERNS, &o. 
I. FEKNS, or FILICES. 
POLYPODIACEA! § POLYPODIES. 
Genus 1. POLYPODIUM, Linnaeus. 
1. P. vulgare, Linnaeus. — Fronds oblong, pinnatifid. Plate 
I. fig. 2. 
mr. cristatum. — Fronds pinnatifid, segments and fronds 
tasselled at the apices. 
var. semilacerum. — Fronds pinnatifid, lower segments 
again pinnatifid, upper fertile. 
mr. oambriciim. — Fronds pinnatifid, segments again 
pinnatifid, all barren. 
2. P. Phegopteris, Linnaeus. — Fronds pinnate below ; pin- 
nse pinnatifid. Plate II. fig. 2. 
3. P. Dryopteris, Linnaeus. — Fronds ternate, deltoid, gla- 
brous. Plate II. fig. 1. 
4. P. Bobertianum, Hoffmann . — Fronds subternate, elon- 
gate-deltoid, glandular-mealy. Plate III. fig. 1. 
