POLYPODIACE^E. 



333 



more acutely toothed lobes of the pinnules ; also near a form of Polystichum 

 aculeatum Sw., but separable from it by the much shorter subtriangular fronds 

 and subentire scales. The pinn3 or pinnules of this fern are very much like 

 those of P. aculeatum, but the shape of fronds and scales are like those of P. 

 varium. The new fern looks to be just an intermediate species of P. aculeatiim 

 and P. varium. 



Polystichum niitakayamense HAYATA (Fig. 137-i, et 138) Fl. Mont. 

 Formos. p. 243, t. 41 ; Polystichum stenaphyllum HAYATA Mater. Fl. Formos. p. 

 426 (non CHRIST). Descriptio auctata : Khizoma ascendens apice frondes csesp- 

 itosuin gerens. Pagina frondis supra glabra subtus squamis lepidiformibus con- 

 spersa, squamis ovatis apice caudato-acuminatis basi 

 peltatis rotundatis margine ciliato-dentatis mm. longis. 

 Indusium minutum polygono-rotundatum peltatum mar- 

 gine erosum \ mm. in diametro. 



Fig. 137; a, a pinna of Polystichum leptocaulon HAY.; b, 

 Polystichum longistipes HAY.; c, a sorus of the same species; 

 d, Polystichum obtuso-auriculatum HAY.; e, a sorus of the same 

 species ; f, Polystichum pseudo-Maximowiczii HAY. ; g, a sorus of 

 the same species ; h, a scale on the rhachis of the same species ; 

 i, a scale of Polystichum niitakayamense HAY.; j, a pinna of 

 Polystichum simplicipinnum HAY. 



Fig. 138, Poly- 

 stichum niitakaya- 

 mense HAYATA x . 



