266 



POIATODIACE^:. 



a 



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



iiivolucram. 



Dennstcedtia BERNH. 



Dennstsedtia leptophylla HAYATA sp. nov. (Fig. 98). Ehizoma ? Stipes 

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

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

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

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

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

 latis apice caudato-acuminatissiniis basi truncatis 

 breve petiolatis, pinnulis ordinis I. inferioribus 

 niediisque a3quilongis lineari-lanceolatis, superiori- 

 bus rninoribus versus apicem ad lobos acuminis 

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

 apice caudato-acuminatis basi latissimis basi latere 

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

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

 latis apice obtusis basi cuneatis latere superiore 

 subauriculatis margine lobatis, (lobis oblongis ro- 

 tundatis apice obtusissimis sursum minute serrala- 

 tis); textura tenuissima membranacea herbacea in 

 exsiccato pallid o-viridis pagina supra minus subtus 

 plus hirsuta ; rhachis frondis, pinnarumque in sectione plano-convexa supra 

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

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

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

 interdurn 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 

 pinnaruni ord. II. siti. 



HAD. Urai, Jiili. 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. Smitkii 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. 



