508 
FILICES. 
[. Polypodium . 
the edge. Sori round, superficial, scattered, minute, very abundant. 
P. punctatum, Sw., non Thunb. P. altum, Bojer , Sort. Maur. 417. 
P. sessile, Kaulf. ; Bojer , Sort. Maur. 416. 
Mauritius and Seychelles, on old trunks in the forests. Spread through the 
tropical zone of the Old World. 
22. P. Phymatodes, Linn. ; Hook, and Baker , Syn. Fil. 364. 
Eootstock woody, wide-creeping, in. thick ; scales linear-subulate, 
nearly black. Stipes distant, naked, straw-coloured, |-1 foot long. 
Frond rhomboid or deltoid, \-l foot long, membranous, green and 
naked on both surfaces, cut down to a broad wing into lanceolate acute 
entire segments \-l in. broad. Veins fine, immersed, anastomosing 
copiously. Sori round, moderately large, scattered, distinctly im- 
mersed. P. scutifrons, Bojer , Hort. Maur. 417. 
Mauritius, Rodriguez, and Seychelles, common on old trunks in the forests. 
Spread through the tropics of the Old World. 
23. P. Willdenovii, Bory ; Hook, and Baker , Syn. Fil. 367. Eoot- 
stock thick, woody, wide-creeping ; scales dense, linear, bright reddish- 
brown. Barren fronds sessile, oblong, brown, rigidly coriaceous, 6-9 
in. long, shallowly pinnatifid, with oblong obtuse lobes. Fertile frond 
much larger (1-2 feet long) subcoriaceous, naked, on a short naked 
stipe, cut down nearly or quite to the rachis into lanceolate entire 
pinnae 1-1 i in. broad. Veins prominently raised, the main ones erecto- 
patent, distinct nearly to the edge. Sori round, distinctly immersed, 
forming a single row near the midrib of the pinnae. 
Mauritius, on old trees at Quartier Militaire and on the Pouce range. Also 
Madagascar, Bourbon, and Tropical Africa. 
24. GYMN O GRAMME, Desv. 
Capsules stalked, splitting transversely, with an incomplete vertical 
ring. Sori dorsal, linear, simple or forked, not anastomosing, without 
any involucre. — Ferns of very various habit and cutting, with simple 
or compound veining. Distrib. Tropical and warm temperate zones 
of both hemispheres. Species 90. 
1. G. lanceolata, Hook.; Hook, and Baker , Syn. Fil. 387. Eoot- 
stock slender, wide-creeping ; scales linear, dull brown. Frond simple, 
lanceolate, coriaceous, glabrous, 9-18 in. long, f-1^ in. broad at the 
middle, narrowed to an acute point and short flattened stipe. Veins 
fine, immersed, anastomosing copiously. Sori simple, linear, \-l in. 
long, parallel to one another in a row on each side of the midrib. 
G-rammitis lanceolata, Sw. ; Bojer , Hort. Maur. 415. Polypodium 
Loxogramme, Mett . ; Kuhn , Fil. Afric. 149. 
Mauritius, on rocks and old trunks in the forests of the Pouce, etc. Spread 
through the tropics of the Old World. 
