428 ART, I.—B. HAYATA: 
parcissime brevissime hirtellae, pilis albis brevissimis } mm. longis. 
Sori sub quoque dente pinnularum 1, utraque latere costie 3-4, 
rotundati, | mm.in diametro, ad apicem venularum terminales. 
Indusium persistens cordatum, margine croso-integrum. 
Has. in Montibus Centralibus. 
Near D. Kawakamii, but differs from it in having somewhat 
scaly and curled hairs on the fronds, and in the transversely 
spreading and sometimes descending pinne. D. Kawakamii has 
very rigid and straight hairs on the fronds, and its pinne are more 
or less ascending. ‘The present plant should better be referred to 
Dryopteris on account of its habit and texture. (See p. 449). 
Polystichum dimorphophyllum* Hayara sp. nov. Aspidiwm 
dimorphyllum T. Id (in sched.) 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 apice 14 mm. lati supra late suleati 
subtus convexi parcissime squamati straminei. Frondes (steriles) 
coriacee rhombeo-triangulares apice acuminate 20 cm. longie 
basi latissime 14 cm. late, partibus infimis tri-pinnatis, inferioribus 
mediocribus nec non superioribus bi-pinnatis, prope apicem sim- 
pliciter pinnatis, pinnis utraque latere frondium 12, inferioribus 33 
cm. a s¢ remotis ; pinnis infimis longissimis 10 em. longis lanceolatis 
4 em. 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 ; piumulis 1. infimis lanceolatis 4 em. longis 15 
* It is provisionally named Aspidium dimorphyllum by Dr. 'T. vd in a label of the 
specimen in the Herbarium at TOky6, which species, however, has never been described. As 
the name dimorphyllum is etymologically incorrect, I have ventured here to describe the plant 
as P, dimorphophylium, referring it to the genus Polystichum. 
