27 



fibro-vascular fascicle, without free included veiulets. Sori long and 

 narrowly continuous, occupying the distal portion of the frond, for about 

 three-fifth of the whole length, except its end and occasionally interrupted 

 in the inferior portion, lying in the narrow groove on both sides of the 

 midrib and a little apart from the margins, consisting with the compact 

 sporangia, appearing ferruginous when matured sufficiently, intermixed 

 with a few minute, pedicellate, peltate, denticulate and generally 'ovate 

 scales. Sporangia obovate, slightly compressed, pedicellate ; the pedicel 

 slender, usually longer than the capsule ; annulus yellow, the walls of 

 the partition reddish- yellow ; spores numerous, elliptical-subreniform, clear 

 dilute-yellow in colour. 



Tcenitis sp. Miyoshi in Bot. Mag., Tokyo, III (1889). p. 351-53, 

 tab. XIII. 



Nona. Jap. Ri-himo (the local name in Shimo, Pro v. Mino, after 

 M. lino, meaning "cords on tree."), Kuragari-sliida (named by M. 

 Miyoshi). 



Hob. Prov. Hida : Kuragari, Ochiai-mura in Masuda-gori ( Y. Nawa 

 secund. M. Miyoshi, iff. Miyoshi ! Aug. 15, 1889, herb. Sc. Coll. Imp. 

 Univ. Tokyo) ; Prov. Mino : Kuragari-dani, Shiro-yama, Iwamura in 

 Ena-gori (Sadaziro Mori ! July 19, 1890), Shirasu-hora (Moriatsu lino ! 

 Summer 1890) and Miyamoto = Mori (M. lino I Jan. 23, 1898) in Shimo, 

 Shimoharada-mura, Ena-gori. 



This peculiar and extremely rare fern is the only representative 

 of the genus Tcenitis in Japan. On a superficial observation it appears 

 to belong to the genus of Vittaria, especially approaching to V. Fudzinoi 

 Makino and V. lineata Sw. (not yet found in Japan), but the anasto- 

 mosing venation immediately distinguishes this species from that genus, 

 and. present one has much narrower fronds than any species of Tcenitis 

 already recognized. It grows with its long and narrow, dense, hanging, 

 abundant fronds high on the trunk or the branch of old trees, such as 

 Torreya nuci/era, Magnolia hypoieuca, and Prunus pseudo-Cerasus 

 chiefly in the dense forest. It was found at first in the above cited 

 date and locality by Mr. Yasushi Nawa an entomologist of Japan, 

 afterwards it was also collected in the same locality by Professor M. 

 Miyoshi, who is certainly the first writer of this plant as above quoted. 

 I am greatly indebted to Mr. Sadaziro Mori and Mr. Moriatsu lino for 

 communicating me the dried and living specimens of this rare species 

 collected by themselves. 



