184 



rOLYPODIACK^J. 



Hab. .\iisan, leg. B. Hayata, 1912, Jan. 



Near D. laxa, but differs from it by the not ciliate iudusium and less 

 baiiy fronds. 



Dryopteris (Ctemtts) tenuifrons Hayata sp. nov. (Fig. 122). Rbizoma? 

 Stipes 40 cm. longus parce squamatus, squamis 

 lanceolatis 4 mm. lougis 1 mm. latis, sub lente 

 pubescens. Frous longe triaugularis 60 cra. 

 louga 40 cm. lata apice triangnlari-acuminata 

 basi in amljitn obtriaugulari-acuta inferiore 

 bipinnata, pinnis inferiorilms a se 8-10 cm. 

 remotis a rhacLibus lO^^-diT divaricatis, pinnis 

 infimis triangularibus 20 cm. longis basi totius- 

 que latis apice triangulari-acutis breve petio- 

 latis (petiolis 1 cm. lougis) infequilateralibus 

 latere superiore 8 em. latis, latere iuferiore 14 

 cm. latis, pinnulis inferioribus a se 3 cm. 

 remotis a costa pinnje angulo 80°-90' divarica- 

 tis, pinnulis infimis (latere inferiore) longissimis 

 superioribus gradatim brevioribus, iufimis 

 longissimis lineari-lanceolatis 14 cm. longis 3 

 cra. latis apice acuminatis liasi traucatis latis- 

 simis breve petiolatis vel sessilibus piunati- 

 fidis vel piunatilobis, lobis liueari-oblongis 

 17mm. longis Gmm.bitis apice obtusis 



margino cre- 

 nulatis, crenu- 

 lis ± ascen- 

 dentibus ; sti- 

 pitt'S, rhaclies 

 costieque toto 



Fig. i22, DryopteristtnuifronsHAYATi.; a, the pbmt ; b, (v scale on castaneo-rube- 

 tLe stipe ; c, a 11.111 on the costa of a pmnule ; il, a iiortion of a pinna. sceutes ' frons 



textm-a temussime herbaceo-membranacea supra plus minus pubescens, pilis 



