206 POLYPODIACEJE. 



pinnula HAYATA Mater. Fl. Formos. p. 431. Davallia Clarkei HAYATA in 

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



HAD. Mt. Arisan ; epiphyta ad truncos CJtamcecyparis et Taiivanice, 

 leg. S. SASAKI, Mai., 1913. 



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

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

 baud squamati basi parce squainati, squamis elongato-triangularibus tennibus 

 leviter rubescentibus margine erosis apice obtusis. Frondes triangulares 

 19 cm. longge basi 20 cm. latae, pinnis utroque latere 15, infimis 3-pin- 

 natis 10 cm. longis, inferioribus bi-pinnatis 6-7-8 cm. longis 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. longis a se 3 mm. remotis ; 

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

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

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

 pinnulis H. ovatis inferioribus 6 mm. longis 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 cornua rotundatis; rhaches 

 frondium supra leviter tenuissime bisulcatse subtus convexse utrinque glabrae; 

 rhaches pinnarum subcomplanatse supra plus minus sulcatge subalatse ; paginse 

 membranacesB utraque glabrse. Sori ad sinus furcse venularum vel interdum 

 ad angulos venularum flexarum ad centrum segmentorum pinnularum H. siti 

 solitarii. Indusium semiglobosum f mm. latum -^ mm. longum basi leviter 

 cordatum vel truncatum. 



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

 characters which are most important, so far as the modern pteridblogy 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 pinnse, pinnules and segments, as is the case with AcropJiorus. 



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 



