POLYPODIACE^K. 



267 



differs from it by the very thin herbaceous fronds with very much smaller sori. 

 Dennstaedtia scabra MOORE (Fig. 99). MATSUM. et HAYATA Enum. PL 

 Formes, p. 594. Khizonia repens vermiforme recurvum rubescens versus apicem 

 dense pilosum haud squamatum, pilis rubescentibus vel albescentibus filifornii- 

 bus 2 mm. longis adpressis vel ascendentibus 3 mm. in diametro remote froncli- 

 gerum, frondibus a se 3 cm. distan- 

 tibus remote radicantibus, radicibus 

 filiformibus ramosis. Stipes 16-35 

 cm. longus medio 3 mm. crassus 

 castaneo-rabescens muricatus basi 

 squamato-pilosus sursum scaber niti- 

 dus subglaber supra profunde sulca- 

 tus subteres subtus convexus. Frons 

 tripinnata in ambitu triangulari- 

 ovata 12-40 

 cm. longa 11- 

 40 cm. lata 

 apice triangu- 

 lari-acuminata 

 basi in ambi- 

 tu triangulari- 

 obtusa, pinnis 

 infimis longis- 

 superi- 



grada- 



simis 

 oribus 



tim minoribus 

 versus apicem 

 subito minori- 

 bus ad dent-em 

 ascendentem 



Fig. 99, Dennstceatia scuora MOOBX X ^ ; a, portion of a pinnule ; b, a 

 aciiminis redu- sorus; c, hairs on the frond. 



ctis, pinnis infimis in specimine maximo nostro acumiuato-triangularibus 24cm. 

 longis 11 cm. latis apice acuminatissimis basi triangulari-obtusis latere inferiore 



