Polypodium .] 
FILICES. 
507 
immersed in the tomentum, filling up the whole of the upper half or 
three-quarters of the frond. P. spissum, Bory ; Kuhn , Ml. Afric. 
153. Niphobolus spissus, Kaulf.; Bojer , Hort. Maur . 415. 
Mauritius, Rodriguez, and Seychelles, on mossy rocks. Spread through the 
tropies of the Old World. 
18. P. lycopodioid.es, Linn. ; Hook, and Baker , Syn. Ml. 357. 
Rootstock wide-creeping, about £ in. thick, often much branched ; 
scales lanceolate, bright brown. Stipes distant, very short. Frond 
lanceolate, entire, subcoriaceous, glabrous, 3-4 in. long, f-f in. broad, 
acute, cuneate at the base. Veins fine, immersed, anastomosing co- 
piously- Sori round, immersed, forming a single row midway 
between the midrib and edge. P. lagopodioides, Desv. j Bojer , Hort. 
Maur. 416. 
Mauritius, on rocks of the Pouce, Pieterboth, etc. 
tropics. 
Cosmopolitan in the 
19. P. lineare, Thunb. ; Hook, and Baker , Syn. Fil. 354. Root- 
stock woody, wide-creeping, glaucous, £ in. thick ; scales brown, lan- 
ceolate, deciduous. Stipes distant, naked, straw-coloured, 1-2 in. 
long. Frond lanceolate, entire, subcoriaceous, green and glabrous on 
both surfaces, 6-12 in. long, in. broad at the middle, narrowed 
gradually to both ends. Veins fine, immersed, anastomosing copiously. 
Sori large, round, immersed, mixed with peltate scales, forming a single 
row nearer the midrib than the margin. P. excavatum, Boryj Bojer 
Hort . Maur. 416. P. simplex, Sw. ; Bojer , loc. cit. 
Mauritius, on rocks and trees. Spread through the two warmer zones of 
the Old World. 
20. P. lanceolatum, Linn. ; Hook, and Baker , Syn. Fil. 356. 
Rootstock slender, woody, wide-creeping ; scales small, brown, lanceo- 
late. Stipes distant, naked, 1-2 in. long. Frond lanceolate, entire, 
4-6 in. long, J-f in. broad at the middle, narrowed gradually to both 
ends, coriaceous, glabrous above, clothed beneath with scattered peltate 
scales brown in the middle and pale at the edge. Veins fine, immersed, 
anastomosing copiously. Sori large, round, slightly immersed, forming 
a single row midway between the midrib and edge. Pleopeltis macro - 
carpa and marginalis, Kaulf. ; Bojer, Hort. Maur. 389. 
Mauritius, on exposed mountain rocks, rare. Spread through the two warmer 
zones of both hemispheres. 
21. P» irioides, Lam. ; Hook, and Baker , Syn. Fil. 360. Root- 
stock stout, woody, short-creeping ; scales few, minute, brown, lanceo- 
late. Fronds tufted, sessile, simple, entire, lanceolate, glabrous, mem- 
branous or subcoriaceous, 1-3 feet long, 1-3 in. broad above the middle 
acute, narrowed very gradually to the base. Veins fine, immersed, 
anastomosing copiously, the main ones erecto- patent, distinct nearly to 
