MATERIALS FOU A FLOKA OF FORMOSA. 429 



cm. Ititis apico acuminatis basin obfcusis, piiiiiulis 11. iiifimis obliquo 

 ovatis latere superiore majoribus 11 mm. longis G mm. latis 

 apicc aristatis basi ciiiieato-attenuatis brevissime petiolulatis 

 margine O'-t-o-sernilatis, serrulis aristatis ; rhacbes frondiiim com- 

 planattic supra sulcatse (ctiam.qiie) a latere sulcatcü subtiis convexa3 ; 

 rhaches pinuariim complanata; supra sulcatso sursum subalatœ, 

 subtus pai'cissime squamäta). Frondes (fertiles) lanceolatcTo vel ovatte 

 ill ambitu, apice liiieari-acuminat-x3 basi obtusoo, partibus inferio- 

 ribus tripinnatis, sui^erioribus bi-pimiatis, versus apicem simpliciter 

 pimiatis, pimiis utraquc latere 12 inferioribus 5 cm. a se remotis, 

 longissimis 9 mm. longis remote pinnatis circ. linearibus, pinuulis 1. 

 lincaribus ; pinmilis 11. ovatis acutis basi attenuatis 7 mm. longis 

 3 mm. latis margine o-4-dentato-lobatis, lobis ascendentibus acutis 

 ad tatam laminam soriferis cum soris retiexis. Sori sub quoque lobo 

 circ. 1, interdum 2, prope costas siti, globosi, 2 mm. in diametro, 

 a so approximati, totam paginam occupantes. Indusium globosum 

 basi profunde cordatum 2 mm. in diametro. 



Hab. Liukiu : Nagodake, Aprili. 191)7, leg. G. Nakahaka. 



The present [)lant is very remarkable for its dimorphous fronds. 

 It is very near Pofystldiuia apUj'olluin (Sw.) C. Chuistensen, but 

 differs from it by the much contracted fertile fronds. This and 

 its (congener are so different from any other species of the genus, 

 that it is much desirable to have a subgenus for them. 



Gfjniiio2)tcris I^hesl. 

 Gymnopteris contamlnans 1>edd. ; IIayala in Tokyo Bot. Mag. 



xxiii. ]). 2(;. 



Diptcris Heixwak or. 

 Dipteris conjugata Iîeinw.; ( '. CniiisTEXsEX Ind. Fil. p. 242. 



