April, 1914] MAKINO.-OBSERVATIONS ON THE FLORA OF JAPAN. Hg 



ones gradually remote ; bracts long-ciliated. Flower larger, 

 about 2\ ram. long, rose. Achene scarcely exserted from tlie 

 persistent calyx, biconvex, oval-ovate, acute at the apex, 

 shining, brownish-black, 2| mm. long. 

 Nom. Jap. Saikoku-nukabo (nov.). 



Hab. Prov. BITCHU : Makane-mura in Kibi-gori (DyCro 

 NiKAi ! Herb. Sc. Coll. Imp. Univ. Tokyo, Oct. 26, 1902, No. 

 939) ; Prov. BU2EN : Toyotsu (S. Hamada ! Herb. ibid. Oct. 

 1904). 



This variety is distinguished from the type by having the 

 shorter and clispersedly pilosulous leaves, laxer-disposed flower- 

 clusters, larger flowers and larger achenes. 



Polygonum Eawagoeanum Making, sp. nov. (Sect. 

 Persicaria.) 



Stem ascending, ramose, slender, terete, glabrous, hardly 

 striate and ferrugineous and hard when dried, scarcely promi- 

 nent at the nodes. Leaves very shortly petiolate or sub- 

 sessile, linear, gradually acuminate at the apex, rounded or 

 subcordate at the base, adpressed-ciliated on margin, very 

 thinly adpressed-pilosulous above (hairs denser on the midrib), 

 thinly adpressed pilosulous on the midrib and veins beneath, 

 impunctate, firmly membranaceous, 2^-8 cm. long, 3-8 mm. 

 wide ; midrib prominent beneath ; veins delicate, erect-patent, 

 not close. Racemes spike-like, terminal and axillary, erect, 

 peduncled, narrow, densely flowered, about 3-4| cm. long ; 

 rachis filiform; peduncle gracile, often long, straight. Flower- 

 clusters approximate, lowest one sometimes interrupted ; bracts 

 turbinate, obliquely truncate and long or shortly fimbriato- 

 ciliated, glabrous, purpurascent above and green below, 

 1^-2| mm. long. Flowers minute, pedicellate, 2 mm. long, 

 rosy. Calyx 5-i3arted, eglandular ; segments oval, rounded- 

 obtuse at the apex, concave, the outermost one subcarinate 

 towards the apex. Glands 5, minute, opposite to the calyx- 

 segments. Stamens 5, included; filament narrowly subulate; 

 anther minute, rounded. Pistil included ; ovary subrhombeo- 



