340 roLTroDiACE-K. 



/9. Piuna3 less tliau 2cm. loug, ucaily straiglit, more or less ascendiug, 

 less sharply tootlaed. P. leptopteron Hayata. 



b. Fronds nearly equaling the stipas iu length. 



a. Sori locating nearer tbe costula than the margin ; scales nearly 



fimbriate at the base, usually subentii-e. P. longislipes Hayata. 

 /3. iSori locating nearer the margiu tliau tlie costa ; scales setaceous. 



P. Hancoclcii Diels. 

 B. Tlie lowcst pinnaj are uearly the same as the othei-s, and iLsually obscm-ely 

 piuuate. 



a. Pinua? not exceeding 1 cm. iu k^ngth, usually asceudiug ; lower 

 margin of the iiiuuas divaricating from tlie rhachis of the fronds 

 at the angle 45'. P. yccyamemc 3L\kixo. 



/9. Piuna3 exceeding 1 cm. in lengtli, usually nearly horizontal ; lower 

 margin of the xiinnaj divaricating from the ihachis of the fronds at 

 angles 70'-90'. P. siinplicipinnum Hayata. 



Polystichum Hancockii Diels iu Exgl. u. Pr.vxtl Xat. Pfl.-fam. 

 Pterid. 11. 191 ; Ptilopteris Hancochii Hakce in Jom'n. Bot. XXII. ji. 139 : — 

 '■' CiBspitosa, foliis tenuiter coriaceis in sicco olivaceis glabemmis petiolo 8- 

 ix)llicari sordide stramineo paleis paucis setaceis iiallidis hiuc iude tecto, lamiua 

 8-pollicari lanceolata acuminata pricter segmentum utrumc[ue iufimum 2^ pol- 

 licare iterum lunnatisectum simjiliciter pinuatisecta segmentis numerosis appro- 

 ximatis patenti-divergentibus 5-9 lin. lougis 2 lin. latis breviter petiolatis e 

 basi inferiore dimidiato-cimeata apicem versus tautum dentata sujieriore auricu- 

 lata traj)ezio-ovata ovato-lobidata lobidis setaceo-mucronatLs postico nunc sub- 

 distincto nervLs semel fm'catis, soris ad rarai autici apicem sitis margini potiua* 

 quam costulaj excentric» approximatLs. In doi-so montium juxta Tam-sui, Ins.* 

 Formosa?, alt. 3500 ped., d. 11. Dec. 1881, rarissimam invcnit am W. Hanxock.^ 

 (Herb. propr. n. 22229)." 



Polystichum leptopteron Hayata sp. uov. (Fig. 141 et 137-a). Rhizoma 

 ascendens apice crespitosum frondigenim. Stipes 10 cm. longus. Frons 20 cm^ 

 louga cruciforme trifoliolata, piuna terminali liueari-lanceolata apice caudato- 

 acuminata basi tnmcata piunata, pinuulis lincari-quadraugidaribus mediis l|cm. 



