420 AKT. I. — B. HAYATA : 



completely includes a sorus in itself. It is densely covered with 

 very short glandulous hairs on the upper side of the outer surface, 

 but it is quite hairless on the lower side of the same surface. It 

 is quite hairless inside. It should be referred to a special 

 section together with Dryopteris Maximowicrdi which has a very 

 peculiar sorus different from that of other species of the genus. 

 ]My thanks are due to Mr. S. Kodama who has kindly examined 

 the plant at my request. 



Dryopteris rufinervis Hayata sp. nov. Stipites? Frondes ova to - 

 lanceolata ut videntur verisimiliter ultra 150 cm. longas SO cm. latae 

 bipinnata3, (sed pinnis intimis cum una pinnula pinnata) ; pinnis in- 

 ferioribus lanceolatis in ambitu, subsessilibus, 45 cm. longis, 23 cm. 

 latis a basi 18 cm. latis, apice acuminatis, utraque latere pinnulis 15- 

 16, a se 0-4 cm. remotis, pinnulis mediocribus angustato -lanceolatis 

 1 2 cm. longis 3 cm. latis apice cuspidato-acuminatis, (cuspidibus 

 hnearibus), basi circ. aîquilatis pinnatifidis (lobis elliptico-angustatis 

 a medio usque ad basin sequilongis 1 cm. longis 7 mm. latis ascen- 

 dento-patentibus apice obtusis basi œquilatis, margine crenato 

 serratis, serris obtusis, sinibus inter lobos angustis obtusis 2 mm. 

 latis apice a rhachibus 3 mm. remotis) ; partibus apicalium pinnu- 

 larum et pinnarum margine lobulatis, sur sum serratis ; pinnis 

 infimis oblique triangularibus in ambitu 45 cm. longis 30 cm. latis 

 Ijasi latere superiore 10 cm. latis, latere inferiore 25 cm. latis, 

 pinnulis latere superiore 15-17, latere inferiore paucioribus 13-15, 

 pinnulis infimis (latere superiore) a rhachibus frondium 3 cm. remotis, 

 lis mediocribus conformibus œquilongis ; pinnulis (latere inferiore) 

 iis latere superiore generaliter longioribus, ias in longitudine 

 2J-plo aïquantibus, prsesertim pinnule infimo longissimo a rhachi- 

 bus frondium 8 cm. remote 25 cm. longo 12 cm. lato pinnate, pinnulis 



