64 



3Iahino ! Sept. 1892, Oct. 15, 1892), Erasawa (/. Dot ! Aug. 15, 1890), 

 Iwado (/. Doi ! Aug. 28, 1890) ; Prov. Iyo : Shoyenzi-mura in Onsen-gori 

 {K. Okudaira\ July 1894); Prov. Mikawa : Near Toyohashi {T. 31aldno\ 

 Oct. 25, 1893, Oct. 29, 1894), Kameyama in Atsumi-gori {T. Maldno\ Oct. 

 27, 1893), Noba in Hadzu-gori {G. Nogura ! Sept. 5, 1897) ; Prov. Kadzusa : 

 Nakahara-mura in Nagara-gori (Herb. ! Sc. Coll. Imp. Univ. Tokyo, Sept. 

 1880); Prov. Hyuga : Takanabe {R. Yatahe and J. Matsumura\ herb, 

 ibid. July 27, 1882); Prov. Mino : Iwato-mura (Herb.! ibid.); Prov. Suo : 

 Ouchi-mura {D. Nikai\ herb. ibid. July 10, 1892); Loochoo: Mizato-magiri 

 in Isl. Okinawa (Herb.! ibid. May 1887), Isl. Kume-shima {H. Kuroiwal); 

 Formosa: Daihoku (T. Makinol herb. ibid. Nov. 10, 1896). 



This species differs from Polygonum muricatum Meisn., by its angustate 

 leaves, the lateral peduncle, and the black-castaneous ruguloso-reticulated 

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

 usually exserted akene. 



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



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

 erect or ascending from the 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, ^-3Jcm. 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 

 angustate, attaining i-3|cm. in length, retrorsely muricate or glabrous; 

 sheath usually longer than the petiole, cylindrical, membranaceous, attaining 

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

 ring at the 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 



