﻿1906.1 OBSERVATIONS ON THE FLORA OF JAPAN. 83 



Both from gerial (normal) and subterranean (cleistogamous) flowers 

 fruits are richly yielded but of different forms of legumes. The subter- 

 ranean legumes are used by Ainu of Hokkaido (formerly Ezo) as a food 

 called by the name Aha, according to Dr. Prof. K. Miyabe. 



Ruta subtripinnata Miq. Prol. Fl. Jap. \\ 209; Francb. et Sav. Enum. 

 PI. Jap. I. p. 71. = Ruta chalepensis Linn. Mant. I. p. 69, var. /5. 

 bracteosa Halacsy, Consp. Fl. Gnec. I. (1901) p. 312. 



Ruta bracteosa DC. Prodr. I. p. 710 ; Koch, Syn. Fl. Germ, et Helv. 

 ed. 3 ; p. 125 ; Spreng. Syst, Veg. II. p. 320 ; Nyman, Syl. Fl. Europ. p. 

 219; Keichb. Fl. Germ. Excurs. p. 766. 



? Ruta graveolens Hoffm. et Schult. Noms Indig. PI. Jap. in Journ. 

 Asiat, (1852) p. 327, et nouv. ed. p. 53. 



Glaucous-green. Stem minutely punctate. Leaves shortly petiolate or 

 subsessile, bi- or subtripinnatisected, width about \ of the length ; pinnae 

 decrescent in size above and below, the lowest ones more or less stipule- 

 form ; leaflets linear-oblong, coneate or cuneato-obtase and subunequal at 

 the base, obtuse or acutish at the apex. Corymb divaricate ; bracts and 

 bracteoles ovato-cordate or lato-ovate. Flowers about 1| cm. across ; pedicel 

 glabrous. Sepals triangular, acute. Petals yellow, abruptly unguiculate, 

 fimbriate. Stamens as long as the petal ; anther oblong, yellow. Style 

 short. Capsule about 5 mm. long, globose, 4-lobed above, punctate ; lobes 

 erect. 



Nom. Jap. Henruda. 



Hab. Prov. Musashi : Tokyo, cult. (T. Mahinol). 



This was formerly introduced into our country and is now occasion- 

 ally found under cultivation.. 



Festuca japonica Makino sp. nov. 



Perennial ; densely caespitose, attaining about 7 decim. in height ; 

 rhizome shortly repent or ascending, gracile ; roots fibrous, fine and dense. 

 Leaves very angustately linear, acuminate, about 1-3 mm. wide, green, 

 minutely scabrous on margin, striate and subconvolute when dry, glabrous 

 beneath, puberulent on nerves above, several-nerved, flaccid ; the basal ones 

 dense, much shorter than the culm, about 7-20 cm. long ; cauline ones few 

 (2-3), veiy loose, not long, with a long narrow glabrous striate sheath 

 which is longer than the blade ; liguly very short and truncate. Culms 



