Plantae Japonenses novse vel minus cognitse. 



(Continued from p. 20.) 



By 



T. Makino, 



Assistant of Botany in the Science College, 

 Imperial University, Tokyo. 



Tssnitis Miyoshiana Makino sp. nov. 



Caudex creeping, elongate, hard, flexuous, about 2 J mm thick and 

 attaining about 7 cm in length, blackish-brown but nearly turning to 

 black when dried, clothed with scales towards the apical end but becomes 

 naked in age, approximately dispersed on the upper surface with a num- 

 ber of the round and concave tubercles, the basal portions left by the 

 fronds fallen in age, densely issuing below filiform, hard, branching, and 

 blackish-brown fibrous roots ; scales appearing black, subulate-ovate, 

 long acuminate, denticulate, 2J-4-J mm long, |-1 mm wide, thinly 

 membranaceous, brown, with densely anastomosing brownish-black nerves 

 which mainly form the elliptical or oblong minute areoke and more 

 often durably remain after the decay of the other portion. Fronds 

 rather densely scattared along the apical portion of the caudex, uniform, 

 simple, very much elongated and narrowly linear, 25-40 cm long, 3- nearly 

 4 mm wide, carnose, mostly soriferous, nearly entire but obscurely waved 

 with incrassated and rounded margins, longitudinally canaliculate along 

 the midway on the upper surface, with a broad and prominent midrib 

 on the under surface, glabrous, rather glossy, very gradually narrowed 

 towards the lower portion and at length forming a short stipe which is 

 Dearly rounded cylindrical and 1J- hardly 2 mm in diameter, shortly at- 

 tenuated towards the apex stopping with a blunt point, deep or often 

 yellowish green above and pallid below; fibro-vascular fascicle only one 

 nearly at (lie centre of the cross section of the frond; veins immersed 

 and hidden in the thick body of the frond, anastomosing, consisting 

 longitudinally long areoke in three rows on ' each side of the median 



