241 



segmento terminal! louge linear! 10 cm. longo ; piunis juxta terminalem 16 cm. 

 lougis ; textura membrauaceo-subcoriacaa ; pagina margiue sorifera Integra, 

 sed prope apicem non sorifera minute creuata. Hhachis piniiarum supra 

 profunde sulcata utroque latere sulcorum 1-lamellata et remote setulosa, setulis 

 2 mm. longis latere complanatis a se l-l cm. remotis ; costa vel costula seg- 

 ment! supra impressa glabra subtus elevata, veuis lateralibus liberis plerum- 

 que duplicato-furcatis (venis a basi furcatis, ramis venarum furcatis). Soil 

 marginales a prope basin segmentorum usque ad supra medium extensi, ab 

 apice segmentorum 1 cm. distautes. 



HAB. Arisan, fere 7-6000 ped. alt., leg. B. HAYATA et S. SASAKI, 1912 , 

 Jan. 



Very near Pteris cxcelsa GAUD. (HoOK. Sp. Fil. II. p. 183 t. 136 ; 

 BEDD. Feru. Brit, Incl. t. 218 ; and Herb. Corean. tested by Dr. T. NAKAI); but 

 ours is different from that in having pinnules or segments with broader base 

 and very much more acuminate linear apex. It should be better regarded as a 

 variety of the same species and should be named P. cxcdsa var. excels issinia. 



Pteris pellucida PB- 



HAB. Arisau, leg. B. HAYATA et S. SASAKI, Jan., 1912. 



Formosan specimen is considerably different from the named species by 

 the much narrower piimse of the fertile and sterile fronds, as far as I can 

 draw from the descriptions given in HOOK. BAK. Sy. Fil. and HOOK. Sp. 

 Fil. In the Philippine specimens, there is a fern labelled P. pslludda 

 which is exactly identical with our fern. I couject that this Pteris may 

 vary a very wide range. At present, I am merely following the Philippine 

 plant to take this name for our fern. The description in HOOK, et BAKER Syii. 

 Fil. p. 154. shows that the fern lias often lower pinna? 8 in long 1 in. broad 

 The figure given in HOOKER Sp. Fil. II. t. 126-B shows also a form with broader 

 fronds than those of ours. 



Pteris setuloso-costulata HAYATA sp. nov. (Fig. 168). Khizoma? Stipes 

 30-40 cm. longus 3 mm. latus stramineus glaber. Frons oblongo-lanceolata 60 

 cm. longa 30 cm. lata apice triaugulari-acuta pinnata vel bipiunata in partibus in- 

 fimis, pinnis suboppositis inferioribus a se 4-8 cm. remotis a rhachibus angulo 

 60 egressis, piunis infimis maguis 18 cm. longis semitriangularibus basi 14 cm. 



