44 BOTANICAL MAGAZINE. [Voi. xyit. 



crenate or paiici-serrate, the upper basal one largest and oblong; venation 

 conspicuous, often slightly elevated beneath when dried ; veins erect-patent, 

 flexuous, pinnate ; venules loose, erect-patent, simple or sometimes furcate. 

 Sori proportionally large, 1-5 (their lowest ones forming a row on each 

 side of the midrib apart from it) to each lobe of the pinnae, but more 

 numerous iu the upper basal lobe, dorsal on the upper portion of the 

 venules, elevated, hippocrepiform or reniform or elliptical ; indusunn thinly 

 membranaceous, entire or suberose on the margin, persistent. Sporangia 

 obovato-oval, the pedicel about as long as tlie case ; spore elliptical, rugose, 

 yellowish. 



Nom. Jap. Iwa-inuwarahi (nov.). 



Hah. Prov. Shimotsuke : Mt. Kikko (T. MaMno\ Aug. 29, 1901), 

 Between Ashio and Mt. Koshin {T. AfaMno I Sept. 11, 1901). 



This species has undoubtedly an affinity to Atliyrium yoJwscence (Franch. 

 et Sav.) Christ, though simpler in form and smaller in size. As far as 

 I know, the habitat is restricted to rocky place of mountains, found 

 rarelv. 



Athyrium yokoscence (Franch. et Sav.) Christ in Bull. Herb. 

 Boiss. IV. (1896) p. 668. 



Asplenium yoJcoscence Franch. et Sav. Enum. PI. Jap. II. (1879) pp 

 225, 622. 



Caudex short, erect or ascending, thickly covered vv^ith castaneous bases 

 of old stipes. Stipes caBspitose, erect, slender, clothed with scales towards 

 the base, pale-stramineous, attaining about 28 cm. long, but sometimes 

 short and 3J cm. long ; scales lanceolate to linear, acuminate, entire, 

 iirmely or thinly membranaceous, ferruginous and concolcrous, but often 

 castaneous excepting the margin. Frond oblong or oblong-lanceolate, 

 acuminate, bipinnatiparted or subbipinnate, 16-34 cm. long, 5-17 cm. wide, 

 iirmely herbaceous, glabrous ; rachis slender, sometimes fibrilloso-squamose 

 below; pinnte 12-18 on each side, patent or sometimes erect- patent, often 

 more or less reflexed in the inferior ones, subsessile, alternate or sometimes 

 subopposite, lanceolate or" angustato-lanceolate, often falcate, acuminate, 

 truncate at the base, deeply pinnatiparted, or subpinnate, usually a little 

 apart or approximate, largest in the middle ones; pinnules numerous, 

 patent, approximate or subi]:)proximate, ovato-lanceolate, or oblong-lanceo- 

 late, acute or shortly acuminate, sharp-serrate or crenato-serrate, usually 

 auriculate at the upper base, the upper basal pinnula larger; venation 



