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BRITISH FERNS. 
Polypodium appendiculatum . Crimson-veined Polypody . 
Like the common Polypody in form, stature, and habit, 
but distinguished by two peculiarities in the venation ; 
the point of the veins are thickened like clubs, and the 
stems, rachis, and veins are of a bright crimson colour. 
A native of Mexico, and flourishes well in a Wardian 
case. 
Polypodium divergens. Spreading Polypody. Differing 
greatly from the species hitherto described. The fronds 
are four times pinnate ; the leaflets linear-lanceolate and 
sharply serrated. A West Indian fern, growing to a 
height of 4 or 5 feet. 
Polypodium rigidum. Rigid Polypody . Fronds grass- 
shaped, so thick and brittle as hardly to bend without 
breaking. A. native of tropical America. 
Polypodium Vittaria , Polypodium lineatum , Polypo- 
dium zosterifolium are narrow-fronded ferns, their grassy 
fronds often pendulous, glossy and growing in massive 
clusters, bearing a line of sori on each margin. Polypo- 
dium lineatum ornaments the trunks of old trees. 
Polypodium diver sifolium. Variously -leaved Polypody . 
Fertile fronds pinnate, 2 feet long; leaflets narrow, 
stalked, blunt, drooping, of a very delicate green colour, 
slightly notched. Barren fronds lobed, almost resem- 
bling an oak leaf, they turn brown in autumn and re- 
main on the plant, contrasting beautifully with the young 
fronds which quickly succeed them. It is a native of 
Java and the East Indies. 
Polypodium irioides . Iris-like Polypody. Frond simple, 
narrow, sword-shaped, resembling Iris leaves. A native 
of Mauritius and New Holland. 
Polypodium muscefolium. Musa-leaved Polypody . 
Fronds simple, egg-shaped, rigid, sessile, pale green, 
