Apk. 1912.] ^ HAYATA.-SOME PLANTS FROM FORMOSA. m 



of Lecanopteris^^ which comes very near to Polypodium. The 

 sori are very peculiar ; the receptacles ejcist at the bottom of 

 holes on the apices of the terminal- or side-lobes of a pinna,— 

 the only character which separates Lecanopteris from Polypo- 

 dium. Our plant somewhat resembles L. carnosa-^ ; but differs 

 m the much narrower fronds and pinnae and in having ciliated 

 scales on the rhizomes. The fern is not very common in these 

 mountains, nor could I find any more than two stocks. One of 

 them is the example from which I have drawn up the following 

 description. 



Lecanopteris formosana Hayata sp. nov. Rhizoma in 

 speciminibus nostris semper breve, verticaliter recurviim, supra 

 cicatricibus stipitura biseriatim notatum, infra radices numerosas 

 emittens, subteres, 2-3 mm. in diametro, squamatum, squamis 

 ovato-lanceolatis, 3 mm. longis, acuminatis, margine et extus 

 cihatis. Stipites 1-2 cm. longi, superiore anguste alati ad 

 frondem abeuntes, nigricantes. Frondes lineari-angustata?, 30- 

 40 cm. long«, 3 cm. latas, apice acuminatae, basi gradatim at- 

 tenuatJE, ad stipites abeuntes, primum breve hirsutte, demum 

 glabratie, pilis fuscentibus, costis utrinque elevatis, 1mm. latis, 

 pinnatifidje vel fere ad rhachin pinnatte, lobis vel pinnis 

 angusto-linearibus alternis angulo 45°-50° ad costas egressis, 

 15-20 mm. longis, medio 2i/o-3mm. latis, basi dilatatis 5mm. 

 latis apice obtusis, (sinubus inter lobos obtusis) utroque latere 

 obscure 1-2-3- dentatis, supra viridibus infra pallidioribus, 

 margine leviter desupra recurvis, supra subglabris, infra squa- 

 mis minutis vel pilis fulvis sparse dispersis, costis frondum pilis 

 nigris brevibus dense obtectis, costis pinnarum supra impressis 

 vel utraque pagine inconspicuis. Sori ad spicem pinnee et 

 dentium pinnai solitariter dispositi, cupuliformes profunde im- 

 mersi, 1mm. lati, totiusque profundi; receptacula ad basin 

 cupularum. Sporangia longe exserta, spora viridibus. 

 Hab. Arisan, leg. B. Hayata et S. Sasaki, Jan. 1912. 



1) Lecanopteris Blume ; Diels, in N. Pil-f. T.— 4, p. 326. 



2) Lecanopteris carnosa Bl; Diels, in N. Pfl-f. I.— 4, p. 326, Fig. 169. 



