428 ART. I. — B. H AY ATA : 



parcissime brevissime hirtella3, pilis albis brevissimis ^y mm. longis. 

 Sori sub quoque dente piiinularum 1, utraque latere costœ 3-4, 

 rotiindati, 1 mm. in diametro, ad apicem venularum terminales. 

 Indusium persistens cordatum, margine eroso-integrum. 



Hab. in Montibus Centralibus. 



Near D. Kaicakamil, but differs from it in having somewhat 

 scaly and curled hairs on the fronds, and in tlie transversely 

 spreading and sometimes descending pinnae. D. Katcahamil has 

 very rigid and straight hairs on the fronds, and its pinnœ are more 

 or less ascending. The present plant should better be referred to 

 Dnjopieris on account of its habit and texture. (See p. 449). 



Polystichum dimorphophyllum'-' Hayata sp. no v. Aspidmm 

 cUmorphijUum T. Itö (in schcd.) in Herb. Tokyo. Rhizoma 

 repens densissima squamatum, (squamis stramineo rubescentibus 

 basi lanceolatis 1 cm. longis apice linearibus). Stipites 18 cm. longi 

 complanati basi 3 mm. lati 'a23ice 1^- mm. lati supra late sulcati 

 subtus convexi parcissime squamati straminei. Frondes (steriles) 

 coriacea3 rhombeo -triangulares apice acuminata 20 cm. longae 

 basi latissimse 14 cm. Iata3, partibus infimis tri-pinnatis, inferioribus 

 mediocribus nee non superioribus bi-pinnatis, prope apicem sim- 

 pliciter pinnatis, pinnis utraque latere frondium 12, inferioribus 3 J 

 cm. a se remotis ; pinnis infimis longissimis 10 cm. longis lanceolatis 

 4 cm. latis a rhachibus frondium angulo 40° divaricatis subrectis vel 

 ascendento-rucurvatis apice acuminatis basi obtusis, breve 

 petiolatis inferiore bipinnatis superiore simpliciter pinnatis prope 

 apicem pinnatifidis ; pinnulis I. infimis lanceolatis 4 cm. longis IJ- 



* It is provisioniilly named Aspidimn dimorphyllum by Dr. T. Itö in n label of the 

 specimen in the Herbarium at Tokyo, which species, however, has never been described. As 

 the name dimorphyllum is etymologically incorrect, I have ventured here to describe the plant 

 as F. dimûfphophyUwa, referring it to the genus I'oly^licJaaa, 



