580 
CVIII. POLYPODIACEyE. 
\_Polyp6dium. 
Ji 
1. G. Icptnphylla Desv. {slender G., or annual Maiden-hair) ; 
slender fragile, fronds ovate or oblong thin bitripinnate, pinnae 
obovato-cuneate bi-trifid or lobed, lobes obtuse, sori often con- 
fluent, rachis dark brown glossy winged above, root fibrous 
annual. Hook, et Grev. Ic. Fit. t. 25 : Newm. ed. 3, p. 11. 
Polypodium ? L. 
.a- 
tar 
But 
Moist banks in Jersey. Q. 3 — 5. — The plant is truly annual, 
the root and fronds dying away entirely in May, and springing 
again from seed in the autumn. Height of the plant from 2 to 4, or 
rarely 6 inches. 
3. Polypodium Linn. Polypody. (Tab. IX. f. 2.) 
Sori roundish. Involucre 0. Margin of the frond not re- 
flexed. — Veins simple or simply branched {in the Bi'itish species'). 
— Named from iroXvc, many , and ttoSiov, dim. of ttovc, a foot; 
from the numerous roots, or from the segments of the fronds. 
Veins branched, the lowest veinlet on the side next the midvein short , 
bearing a sorus at its apex ; the others barren , and disappearing near 
the margin. 
spa 
1. P. vulgare L. {common P.) ; fronds deeply pinnatifid, the 
segments linear-lanceolate obtuse crenulate approximate, upper 
ones gradually smaller. E. B. t. 1149: Neivm. p. 111. Cteno- 
pteris Neivm. ed. 3, p. 41. 
Rocks, walls, trunks of trees, and banks; frequent. 71. 6 — 9. — 1 
Rhizome creeping, very scaly. The lobes of the fronds are sometimes 
deeply serrate and even pinnatifid or laciniate, as it has been found in 
Ireland and Wales, when it becomes the P. Cambricum L. 
ini 
mi 
tat 
iki 
mi 
** Veins simple, all reaching to the margin or nearly so, and bearing sori 
near the apex. 
2. P. Phegopteris L. {mountain P., or Beech-fern) ; fronds \ nl 
pinnate, pinnae pinnatifid the two lowermost ones distinct point- 
ing downwards and forwards, their segments linear-lanceolate | ex 
obtuse entire ciliate the lowermost ones adnate-decurrent, veins | fa 
hairy, sori marginal. E. B. t. 2224 : Newm. p. 122. Gymno- 
carpium Newm. ed. 3, p. 49. P. Thelypteris E. B. t. 1018.? 
Damp shady places, in mountainous countries. 7/.. 6 — 8. 
ra 
3. P. Dryopteris L. {tender three-branched P., or Oak-fern) ; 
fronds ternate bipinnate thin and glabrous, divisions spreading 
and deflexed, the segments obtuse subcrenate, sori marginal. 
E. B. t. 616 : Newm. p. 123. Gymnocarpium Newm. ed. 3, 
p. 57. 
Dry shady places, in mountainous countries. Common in Scot- 
land. Tf.. 7 . — Rhizome filiform, extensively creeping. 
lo: 
b 
P. 
P, 
A 
B 
