Observation on the Flora of Japan, 



(Continued from p. 22.) 



By 



T. Makiiio. 



Leclurer of Boiany in the Science Collecje, 

 fmperial University of Tokyo. 



Sasa Tsuboiana Maldno, sp. nov. 



Rhizome hypog^ous, repent, slender, rooting at nodes. 

 Culm ascending or erect, attaining about 2m. in height, simple, 

 but in age loosely ramose above, slender, terete, fistulose, 

 smooth, glabrous, green, encircled with culm-sheaths and then 

 bare from them in age, attaining about 5^mm. in diameter ; 

 nodes slightly prominent ; internodes attaining about 19cm. in 

 length ; branches solitary to a node, usually encircled with 

 sheaths. Leaves medium-sized, 3-10 to a branch and 

 approximately distichously and submalmately arranged to- 

 wards the apical end, oblong-lanceolate to narrowly lanceolate, 

 acuminate with a very sharp point, rounded to acute at the 

 base and decurrent to the short flat petiole, which is about 

 3-lOmm. in length, chartaceous or coriaceo-chartaceous, 

 glabrous on both surfaces, green above, paler beneath, spinuloso- 

 scabrous on margins, 8-27cm. long, 2^-6cm. broad, sem- 

 pervirent ; midrib slender, prominent beneath, pale-stramineous ; 

 veins 6—10 on each side, fine ; veinlets minutely and very 

 numerously tessellate between veins ; ligule very short, erect, 

 truncate or rounded-truncate, ciliato-scabrous on margin, 

 thinly coriaceous, puberulent dorsally, about 1-l^mm. long ; 

 sheath narrow, striate, glabrous, viridescent and often shaded 

 with purple, setoso-fimbriato-auricled or merely setoso-fimbriate 

 at the mouth and then naked from the deciduousness of the 

 setse. 



Nom. Jap. Tsuboi-zasa, Ihaki-zasa. 



