rOLYPODIACE<E. 



243 



Compared with a specimen from the Philippines. 

 Vittaria SM. 



Vittaiia arisanensis HAYATA sp. nov. (Fig. 169). 

 Epiphytic;!. Rhizoma teuue dense squamatum, squamis 

 tenuibus linearibus 10 mm. longis \ mm. latis 

 apice acuminatis. Stipes subnullus. Frons '-l| 



linearis 50-60 cm. louga 8-9 mm. lata apice X M 

 acuminata attenuata ad stipetem subnnllum /f ,'\ 



abeims integi'a utraque glabra non squamata 

 chartacea, costis supra non visis subtns fere 

 distinctis sed non elevatis, margine subplana 

 leviter recurvata vel uon recurvata ; venis 

 laterahbns liberis laxissime dispositi. Sori 

 a margine 1-14 mm. distantes. 



HAB. Mt. Arisau, leg. B. HAYATA et 

 S. SASAKI, 1912, Jan. Differs from V. lincata 

 by the much larger fronds and by the sori 

 which are not wrapped by the margin. 



Vittaria sp. 



A very slender fern resembling V. 



a 



Fig. 169, Vittaria arisanensis 

 linCOta (LOWE Ex. Fer. Vol. II. t. 65-A ; HAYATA ; a, the plant ; b, a portion 



EAT. Fern. North Americ. t. 38). No fruc- of the frond (underside); c, a P or- 



tion of cross section of the frond, 

 tificatioii. 



Polypodi'iim LINN. 



Polypodium arisanense HAYATA sp. nov. (Fig. 170). Epiphytica. 

 Rhizoma repens complanato-teres 4 mm. in diametro sectionis ad insertionem 

 stipitnm valde elevatnm (partibus elevatis 2 mm. longis) squamis dense obtec- 

 tum, squamis cuspidato-triangularibus apice liueari-cuspidatis basi subtus latis- 

 simis 14 mm. latis 3 mm. lougis basi alte cordatis vel auriculato-cordatis, (an- 

 ricnlis cordum 4- mm. longis subimbricatis basi 2-lobatis, lobis ti'iangularibus 

 margine remote denticulatis), supra insertionem pilis longiusculis 1 mm. longis 

 5-6 instructis castaueis. Stipes intus sulcatus stramineus extus rotundatus 

 castineus semiteres 2 mm. in diametro 10 cm. longus gracillimus glaber haud 



