POLYPODIUM, § DRYNAlllA. 93 



green wlien dry paler bencatli oblongo-lanceohite distantly 

 pinnated glabrous, pinniie 15-17 often \h incb apart, 7-8 

 inches long 1^-2 inches wide from a narrow contracted cu- 

 neate and sessile base oblongo-lanceolate obtusely acuminate 

 entire or subsinuate costate terminal one petiolate larger tlian 

 the rest, costules none, veins manifest forming a uniform 

 network of rather large obk)ng hexagonal areoles which have 

 an oblique direction towards the margin always destitute of 

 free veinlets, sori small subrotund of few capsules not copious 

 but irregularly scattered sometimes dorsal on the veins and 

 sometimes compital. 



llal). Tropical Western Africa : Sierra del Crystal, G.Mann, n. 163 J.— A most 

 distinct species, which I cannot liken to any other. There are no costnles, the 

 veins anastontose so as to form a very niiiforin network of oblong areoles (|iiiie 

 like those of a Selliffuea or llemionitis, with not a single free veinlet, and the 

 sori are small, irregularly scattered. 



§ 11. Drynaria. — Venation an in Phymatodes, chiefly differing in a peculiar 

 habit, more easily recoynized than described. The fronds are often, large, pin- 

 natifid or rarely pinnate, generally dimorphom, witfi the sterile frond se.isile, 

 very distinct from t lie fertile one, shorter, broad, more or less lobed or pinna- 

 tifid, 7iot inaptly compared to Oak-leaves, with strong prominent venation, or, 

 more rarely, token the fronds are xiniform, the lower half partakes of the cha- 

 racter of the sterile frond and the upper portion of the fertile fronds of the 

 dimorphous species. Of the fertile portions the segments or pinnae are, when 

 drif, readily deciduous from the rachis. — Gen. Drynaria, Bory, in Ann. Sc. 

 Nat. ser. i.'a. t. 12-14. " Aglaoniorpha, Schott, Gen.' Fil. 1. 19, Hook. Gen. Fil. 

 t. 91. Dryostacliyura, J. Sm. in Hook. Gen. Fil. t. 95. 



* Fronds uniform. Sp. 390-392. 



390. p. (Drynaria) Heracleuin, Kze. ; caudex stout creep- 

 ing densely clothed with very long slender silky subulate 

 bright tawny scales, fronds uniform 3-G-7 feet long oblongo- 

 lyrate elongated coriaceous acuminate the base often fi-8 

 inches wide sessile cordate and broadly sinuato-lobate, the 

 rest regularly and deeply pinnatifid with segments I-l^ foot 

 long 3-4 inches broad oblong acuminate glabrous, costaj 

 stout, venation very manifest elevated especially beneath, 

 costules conspicuous extending to the margin wide apart but 

 connected by transverse veins forming 7-8 areoles tilled up 

 with a network of quadrangular areoles enclosing free vein- 

 lets, sori small very copious in two transverse series within 

 each primary areole often compital somewhat impressed and 

 forming slightly elevated pustules on the upper surface. — 

 Kze. ill Hot. Zdt. vi. p. 1 1 7. Metten. Po/tj/j. p. 1 1 7. /. 3./: 52 

 (venation). Hook. Gard. Fcrn.t, t. \. P. morbillosum ?, Metten. 



