POLYPODIACE^. 



191 



parallelis), basi inferiore cuneato-acutis sessilibns vel brevissime petiolatis 



margine aristato-serrulatis ; rhachis supra sulcata tenuis squarcata, costis venis 



pinnae tenuissimis utmque pagine elevatis distinctis ; pagina supra nitida atro- 



viridissima glabra subtus regu- 



lariter secus venas venulas cos- 



tulasque squamis minutis obtecLi, 



squamis persistentibus subrubris 



-^g mm. latis cuspidato-rotundatis 



deuticulatis basi cordatis ; textura 



tenuiter coriacea. Frons fertilis 

 quam sterili minora lanceolata 

 30 om. longa 4-5 cm. lata subtus 

 soris utroque latere costas fere uni- 

 seriatim dense insti-ucta. Pinnae 

 steriles et fertiles margine 

 tenuiter albo-marginataj. In- 

 dusium peltatim rotundatum 

 margine irregulariter crenato- 

 integrum l^ mm. in diametro. 



Hab. In monte Ai-isan, ad 

 8000-7000 ped. alt., leg. B. 

 Hayata et S. Sasaki, 1912, Jan. 

 Polystichum constantis- 

 simum Hayata sp. nov. (Fig. 

 129). Dnjopteris cmdantissima 

 Hayata in sched Herb. Tailioku. 

 Khizoma ? Stipes 30 cm. longus 

 fusco-stramineus basi squamatus, 

 squamis nigi-icantibus, in mag- 

 nitudine variabUibus majoribus 

 lanceolatis linearibus vel ovatis Fig. 129, J-.,/.v.s/;,/„„„ ,„„,,sV„„,H,v,v;,m(),iHAYATA; 



a, tbe plant ; b. ii scale at the base of the stipe ; 



acuminatissimis basi aiU"icu]ato- ^> 0°^ o* t^e smnllest scales on the stipe; d, a hair 



. on the iincler surface o£ the frond ; e, a pinna ; f , 



cordatis vel trimcatis 6-7 mm. an indusinm. 



