162 



POLYPODIACE^E. 



simis 2 cm. latis truncatis sessilibus a se 2 cm. remotis angulo recto divari 

 catis pinnatim fidis inferiore ad rhachin fidis superiore prope rhachin fidis- 

 segmentis inferioribus rectangularibus 13 mm. longis 5 mm. latis apice subtrun- 

 catis vel rotundatis margine remote obscureque serralatis vel subintegris apice 



4 denticulatis ; frons chartacea, costa pinnarum supra 

 subplana subtus elevata, venis et venulis supra non 

 elevatis vix visis subtus castaneo-coloratis tenuis- 

 simis distincte visis. Sori utroque latere costulge 

 segmentorum 1-seriatim dispositi. 



HAB. Arisan, leg. B. HAYATA et S. SASAKI, 

 Jan., 1912. 



Near D. pacJiyphylla 

 HAYATA, but differs from it 

 by the thinner, less black 

 and less ciliated scales on 

 the rhachis, and by the 

 thinner fronds. 



Dryopteris (Eudry- 

 opteris) leptorhachia HAYA- 

 TA sp. nov. (Fig. 102). 

 Rhizoma erecto-ascendens. 

 Stipes cum rhachibus nitidus 

 castaneus vel castaneo-rubes- 

 cens 50 cm. longus inferiore 

 dense superiore parce squa- 

 matus, squamis inferioribus 

 lineari-lanceolatis apice acu- 

 minatis 2 cm. longis 2 mm. 

 latis. Frons ovata 40-50 cm. 

 longa 30-40 cm. lata bipin- 

 nata, pinnis inferioribus 



Fig. 102, Dryopteris leptorhachia HAYATA ; a, the plant; l on gi or ibus a se 11 cm. re- 

 b, a iiair on the costa of a pinnule ; c, a pinnule or a segment 

 of a pinnule ; d, e, glandular hairs on the costa of a pinnule. motis angulo 40 a rhachibus 



