1003.1 OBSERVATIONS ON THE FLORA OF JAPAN. 119 



This species differs from Folygonum muricaUim Meisn., by its arigiistate 

 leaves, the lateral peduncle, and the black-castaneons riiguloso-reticulated 

 akene, and the latter has the acutely angled pale smooth shining and 

 usually esserted akene. 



Polygonum (Echinocaulon) hastato-sagittatum Makino sp. nov. 



Annual, attaining 14 decim. in height. Stem slender and long, 

 erect or ascending from decumbent rooting base, erect-patently loosely 

 ramose, smooth or retrorsely muricate, the internodes shorter than the 

 leaves but the superior ones longer than them. Leaves petiolate, lanceolate, 

 acuminate, oblong-lanceolate and acutish in the lower ones, subhastato- 

 sagittate or subhastato-truncate or auriculato-cordate at the base, but the 

 superior ones often obtuse at the base, l^-12cm. long, i-SJcm. wide, 

 glabrous but minutely pilose towards the apex above, very minutely retrorsely 

 or antrorsely scabro-muricate on the margin, scabrous on the midrib beneath, 

 membranaceous ; lateral veins numerous, erect-patent, delicate; petiole 

 angnstate, attaining i— 3|cm. in length, retrorsely muricate or glabrous ; 

 sheath usually longer than the petiole, cylindrical, mem])raimceous, attaining 

 3Jcm. long, glabrous, shortly ciliated, with a retrorsely muricated or strigose 

 ring at tiie base. Panicle loose ; branches slender ; peduncles angustate 

 or filiform, longer or much so than the spike, glanduloso-hispid above or 

 sometimes throughout. Spike capitate to ellipsoid, 6-13mm. long, densely 

 many-flowered ; bracts lato-ovate, glabrous, ciliated, thinly membranaceous. 

 Flowers pedicellate, 3-4imm. long, rose-coloured ; pedicels 2-fasciculate, 

 one exserted and other not, glanduloso-hispid above. Perianth 5-cleft ; 

 segments elliptical, rounded at the apex. Stamens included, 7 ; filament 

 filiform. Ovary narrowly ovoid; styles 3, erect or erect-patent, as long 

 as the ovary, connate at the basal portion ; stigma capitate. Akene 

 enclosed in the perianth and shorter than them, ovoid, acute at the apex, 

 acutely triquetrous, nigro-castaneous, smooth, shining 2i-3mm. long, the 

 face ovate. 



Hah. Prov. TosA : Kochi {T. Mahino ! I^oy. 1891, Oct. 1892), 

 Asakura (T. 3Iahino ! Sept. 23, 1892) , Edagawa {T. Mahino ! Oct. 22, 

 1892); Prov. Shimoosa : Mama {T. 3Ialdno\ Oct. 26, 1890 Oct. 6, 189.5); 

 Prov. Kadzusa : Haseya (Herb. I Sc. Coll. Im]). Univ. Tokyo, Sept. 

 1880) ; Prov. Shimotsuke : Nikko (Herb. ! ibid.) ; Hokkaido {L, Boehmer ! 

 herb, ibid.); ForaiosA: Daihoku (T. Makino \ herb. ibid. Nov. 12, 1896; 

 C. Oioataril herb. ibid. Dec. 21, 1897). 



