204 



POLYTODIACEJE. 



cellularibus instructis ; pagina supra fusco-viridis subtus pallidior. Sori medio 

 inter costam et marginem utroque latere costse pinnse vel costulse auriculae 

 pinnae 1-seriatim dispositi rotundati. Indusium rotundatum ad basin 

 adnatum margine eroso-denticulatum 1| mm. latum latius quam longius. 



HAB. Arisan, ad 8000-7000 ped. alt., leg. B. HAYATA et S. SASAKI, 

 Jan. 1912. 



General aspect of this new species is just the same as that of Dryopteris. 

 But the relationship of this fern and Arthropteris ramosa is very close in the 

 venation, sori and especially in the glandular hairs on the rhachis. Our fern 

 differs from that genus only in having unarticulated fronds. So far as I am 

 aware, this is the most tiny form of all the known species of Nephrolepis. 



Davallia SM. 



Davallia stenolepis HAYATA sp. nov. (Fig. 138). Rhizoma repens 



crassiusculum 

 tereti-sub c o m p 1 a- 

 natum 4-5 mm. in 

 diametro squamis 

 dense obtectum, 

 squamis lineari- 

 ovatis basi ad 

 apicem 1cm. 

 longis basi peltatis 

 (partibus peltatis 

 ovatis 2 mm. longis 

 l^mm. latis) medio 

 linearibus \ mm. 

 latis apice filifor- 

 mibus margine re- 

 mote serrulatis. 

 Stipes subteres 20 

 cm. longus basi 

 plus minus squa- 

 matus supra basin 



Fig. 138, Davallia stenolepis HAYATA ; n, the plant ; b, n 

 scale on the rhizome ; c, margin of the same ; d, pinnule : e, t\ 

 portion of the same; f, a sorus. 



