^36 BOTANICAL MAGAZINE. [vol. xviii, 



There is a plant from the Namsau of Corea in the herbarium of the 

 Sc. Coll. Imp. Univ. Tokyo, collected by T. Uchiyama. It approaches very 

 much to W. sinuata (Hooker), having the indusium of W. polystichoidcs 

 Eaton. 



Woodsia (Physematiumj obtusa (Sw.) Torrey 'Catal. PI. in Geol. 

 Rep. New York (1840)'; Id. <FI. New York II. p. 500'; Hook. Sp. Fil. I. 

 (1846) p. 62 ; Id. Gard. Ferns (1862) tab. 43 ; A. Gray, Man. Bot. ed. 5, p. 

 668, tab. 18, fig. 4-5 (quoad Woodsia) ; Eaton in Chapm. Fl. S. Un. St. p. 

 596 ; Hook, et Baker, Syn. Fil. ed. 2, p. 48 ; Metten. Fil. Hort. Bot. Lips. 

 (1856) p. 98 ; Milde, Fil. Eur. et Atl. (1867) p. 166 ; Lowe, Ferns Brit, et 

 Exot. VII. (1872) p. 69, tab. 29 ; Eaton, Ferns N. Am. II. (1880) p. 189, 

 tab. 71, fig. 5-8 ; Wood, C lass-Book Bot, p. 822, et Am. Bot. et FI. p. 425 ; 

 Christ, Farnk. ErJe, p. 282, fig. 893 ; Diels in Engler et Prantl, Nat. 

 Pfl.-Fam. I. 4, p. 161, fig. 88, C. 



Polypodium obtusum Swartz, Syn. Fil. (1806) pp. 39, 420; Schkuhr, 

 Crypt. Gew. p. 18, tab. 21. 



Aspidium obtusum Willd. Sp. PI. V. (1810) p. 254; Schkuhr, Crypt. 

 Gew. p. 197. tab. 43 b . 



Cysiopteris obtusa Presl, Tent. Pterid. (1836) p. 93. 



Physematium obtusum Hook. Fl. Bor.-Am. II. (1840) p. 259. 



Hypope.ltis obtusa Torrey ' Compend. p. 380.' 



Alsophila Perriniana Spreng. Syst. Veg. IV. (1S27) p. 125. 



Physematium Perrinianum Presl, Tent. Pterid. (1836) p. 66 ; Kunze, 

 Anal. Pterid. (1837) p. 43. 



Cysiopteris Perriniana Link ' Hort. Berol. II. p. 131.' 



Woodsia Perriniana Hook, et Grev. Ic. Fil. I. tab. 68 ; Fee, Gen. 

 Fil. (1850-52) p. 338. 



Cystopteris albescens Link (1841). 



Caudex short ; roots delicate, black, with short rootlets. Stipes erect, 

 stramineous but fulvous at the base, disparsed with lanceolate thinly mem- 

 branaceous isabel-coloured scales, 6-10 cm. long. Frond broadly lanceolate, 

 membranaceo-herbaceous, minutely glandular, nearly bipinnate, about 9-15 

 cm. long, 3-5 cm. broad; pinnaa remote, spreading, subopposite, subsessile, 

 deltoid-ovate, but narrower in the superior ones, obtuse, nearly truncate at the 

 base, deeply pinnati-parted, the middle ones larger ; pinnules a little remote, 

 nearly patent, oblong or oblong-ovate, obtuse, sessile, crenato-lobate, but the 

 lower ones deeply lobate and extremely shortly petiolate ; lobes oval, ere- 



