206 POLYPODIACE^. 



pinnula HAY ATA Mater. Fl. Formos. p. 431. Davallia Clarkd HAY ATA in 

 Tokyo Bot. Mag. XXHt. p. 27 (non BAKER). 



HAB. Mt. Aiisan ; epiphyta ad truncos Cltamascyparis et Taitvanice, 

 leg. S. SASAKI, Mai., 1913. 



Stipites 14 cm. longi glabri stramineo-rubescentes basi plus minus pur- 

 purascentes subteretes (supra) profunde 1-sulcati sursum 2-3-sulcati glabri 

 haud squamati basi parce squamati, squamis elongato-triangularibus tenuibus 

 leviter rubescentibus margine erosis apice obtusis. Frondes triangulares 

 19 cm. longaa basi 20 cm. latse, piunis uti'oque latere 15, infiniis 3-piu- 

 natis 10 cm. longis, inferioribus bi-pinnatis 6-7-8 cm. lougis a se 3-4 cm. 

 remotis, superioribus brevioribus simpliciter pinnatis 3-4 cm. longis a se 1- 

 2 cm. remotis, sursum minoribus 3 mm.-l cm. lougis a se 3 mm. remotis ; 

 pinnis infimis sessilibus lanceolato-ovatis 10 cm. longis 4 cm. latis, latere 

 inferiors latiore 2 cm. lato ; pinnulis I. infimis brevioribus, (inferioribus 

 longioribus sessilibus angustato-quadrangularibus a se 1-2 cm. remotis piunatis); 

 pinnulis H. ovatis inferioribus 6 mm. lougis obtusis angustatis remote pro- 

 fundeque pinnatifidis, segmentis angustissimis remotis cochlearibus bicornutis 

 cum cornibus 1-3 mm. longis 1-J mm. latis basi stipitatis, (cornibus exteriori- 

 bus longioribus interioribus brevioribus), sinibus inter cormia rotundatis; rhaclies 

 frondium supra leviter tenuissime bisulcataa subtus convexse utrinque glabrse; 

 rhaches pinnarum subcomplanataa supra plus minus sulcatae subalatse ; paginaa 

 inembranacese utraque glabrse. Sori ad sinus furcge venularum vel interdum 

 ad angulos venulanun flexarum ad centrum segmentorum pinnularum H. siti 

 solitarii. Indusium semiglobosum f mm. latum | mm. lougum basi leviter 

 cordatum vel trancatum. 



In addition to the original description, I may mention the following 

 characters which are most important, so far as the modern pteridology is 

 concerned. The rhizomes are creeping like that of Davallia and Humata, 

 but the stipes are never inserted by articulation on the rhizomes. The fronds 

 have scales which are very like stipules in flowering plants, on the point of 

 ramification of pinnae, pinnules and segments, as is the case with Acrophorus. 



The habit of this fern is extremely like that of Davallia. It is impossible 

 to separate this species from that genus but for the difference of fructification 



