266 



POLYrODIACE^K. 



Very near Davallia pedata SM., but differs from it by the much broader 

 iiivolucram. 



Dennstcedtia BERNH. 



Dennstaedtia leptophylla HAYATA sp. nov. (Fig. 98). Bhizoma ? Stipes 

 plus 60 cm. longus brevissime hirsutus in exsiccato fulvo-castaneus. Frons basi 

 tripinnata in ambitu ovata apice acuminata basi in ambitu obtusa 120cm. longa 

 100cm. lata, pinnis alternis inferioribus a se 17cm. remotis a rhachide frondis 

 angiilo 45 egressis, pinnis inferioribus longissimis, infimis paullo brevioribus, pin- 

 nis inferioribus circ. 70cm. longis oblongo-lanceo- 

 latis apice caudato-acuminatissimis basi truncatis 

 breve petiolatis, pinnulis ordinis I. inferioribus 

 mediisque asquilongis lineari-lanceolatis, superiori- 

 bus minoribus versus apicem ad lobos acuminis 

 reductis, mediis circ. 10cm. longis medio 2cm. latis 

 apice caudato-acuminatis basi latissimis basi latere 

 superiore subauriculato-lobatis, pinnulis ord. II. ob- 

 longo-quadrangularibus, mediis 1 cm. longis 4 mm. 

 latis apice obtusis basi cuneatis latere superiore 

 subauriculatis margine lobatis, (lobis oblongis ro- 

 tundatis apice obtusissimis sursum minute serrula- 

 tis); textura tenuissima membranacea herbacea in 

 exsiccato pallido-viridis pagina supra minus subtus 

 plus hirsuta ; rhachis frondis, pinnarumq[ue in sectione plano-convexa supra 

 plana modio sulcata latere (utroque) 1-sulcata subtus convexa rubescens hirsuta ; 

 rhachis pinnularam complanata anguste alata ; pinnulis inferioribus ord. I. 

 subalternis a se 2 cm. remotis a rhachide pinnarum angulo 80'-90' egressis vel 

 interdum deorsum reflexis tenuissimis, pinnulis ord. II. subalternis a se 5-6 mm. 

 remotis a rhachide pinnularum angulo 80 egressis, pinnis pinnulis I. vel 

 pinnulis II. plus minus petiolatis vel subsessilibus. Sori in sinu loborum 

 pinnarum ord. II. siti. 



HAB. Urai, Juli. 1912, leg. B. HAYATA et S. SASAKI. 



Near Dennstcedtia cuneata (J. SM. et Hk.) CHRIST, but distinguishable 

 from it by the very much hirsute fronds. Also near D. Smithii MOORE, but 



Fig. 98, Dennstcedtia lep- 

 tophylla HAYATA ; a, a pinnule ; 

 b, portion of the same, show- 

 ing the position of a sorus ; c 

 another sorus ; d, another 

 sorus. 



