340 POLYPODIACEA:. 



ft. Pinna? less than 2cm. long, nearly straight, more or less ascending, 



less sharply toothed. P. hptoptcron HAYATA. 



1). Fronds nearly equaling the stipes in length. 



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



nmbriate at the base, usually subentire. P. lonyistipes HAYATA. 

 ft. Sori locating nearer the margin than the costa ; scales setaceous. 



P. Hancockii DIELS. 



B. The lowest pinna? are nearly the same as the others, and usually obscurely 

 pinnate. 



a. Pinna? not exceeding 1 cm. in length, usually ascending ; lower 

 margin of the pinna? divaricating from the rhachis of the fronds 

 at the angle 45'. P. yceyamense MAKING. 



ft. Pinna? exceeding 1 cm. in length, usually nearly horizontal ; lower 

 margin of the pinna? divaricating from the ihachis of the fronds at 

 angles 70-90. P. simplicipinnum HAYATA. 



Polystichum Hancockii DIELS in ENGL. u. PRANTL Nat. Pfl.-fam. 

 Pterid. p. 191 ; Ptilopteris Hancockii HANCE in Journ. Bot. XXII. p. 139 : 

 " Ca3spitosa, foliis tenuiter coriaceis in sicco olivaceis glaberrimis petiolo 8- 

 pollicari sordide stramineo paleis panels setaceis pallidis hiuc inde tecto, lamina 

 8-pollicari lanceolata acuminata pra?ter segnientum utrumque infimum 2| pol- 

 licare iterum piunatisectum simpliciter pinnatisecta segmentis numerosis appro- 

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

 basi inferiore dimidiato-cuneata apicem versus tautuni dentata superiore auricu- 

 lata trapezio-ovata ovato-lobulata lobulis setaceo-mucronatis postico nunc sub- 

 distincto nervis semel furcatis, soris ad rami antici apicem sitis margin! potius 

 quam costula? excentrica? approxiniatis. In dorso montium juxta Tam-sui, Ins. 

 Formosa?, alt. 3500 peel., d. 11. Dec. 1881, rarissimam invenit am W. HANCOCK. 

 (Herb, propr. n. 22229)." 



Polystichum leptopteron HAYATA sp. nov. (Fig. 141 et 137-a). Rhizoma 

 ascendens apice csespitosum frondigerum. Stipes 10 cm. lougus. Frons 20 cm. 

 longa cruciforme trifoliolata, pinna terminal! lineari-lauceolata apice caudato- 

 acuminata basi truncata pinnata, pinnulis lineari-quadrangularibus niediis l|crn. 



