rOLYPODIACEjE. 



191 



parallelis), basi inferiore cuneato-acutis sessilibus vel brevissirne petiolatis 



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



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



viridissima glabra subtus regu- 



lariter secus venas venulas cos- 



tulasque squamis minutis obtecta, 



squamis persistentibus sub|nbris 



-^ mm. latis cuspidato-rotundatis 



denticulatis basi cordatis ; textura 



tenuiter coriacea. Frons fertilis 



quam sterili minora lanceolata 



30 cm. longa 4-5 cm. lata subtus 



soris utroque latere costae fere uni- 



seriatim dense instructa. Pinnae 



stariles et fertiles margine 



tenuiter albomarginatae. In- 



dusium peltatim rotundatum 



margine irregulariter crenato- 



integrum 1 mm. in diametro. 



HAB. In monte Arisan, ad 

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

 HA.YATA et S. SASAKI, 1912, Jan. 



Polystichum constantis- 

 simum HAYATA sp. nov. (Fig. 

 129). Dryopteris conctantissima 

 HAYATA in sched Herb. Taihoku. 

 Rhizoma? Stipes 30cm. longus 

 fusco-stramineus basi squamatus, 

 squamis nigricantibus, in mag- 

 nitudine variabilibus majoribus 

 lanceolatis linearibus vel ovatis 



acuminatissimis basi auriculato- 

 cordatis vel truncatis 6-7 mm. 



Pig. 129, Polystichum mnstantissimum HATATA ; 

 a, the plant ; b, a scale at the base of the stipe ; 

 c, one of the smallest scales on the stipe ; d, a hair 

 on the tinder surface of the frond ; e, a pinna ; f , 

 an indusium. 



