63 



ovoid ; styles 3, very short, scarcely connate at the very base ; stigma 

 capitate. Akene enclosed in the perianth, ovoid-glohose, with an acute 

 triangular short ti[), smooth, shining, fulvo-castaneous, with persistent styles, 

 2^ mm. across. 



Hah. Prov. Tosa : Sakawa {T. Mahino ! 1884), Idzuma {T. Muhino 1 

 Oct. 17, 1892); Prov. Yamato : Nara (Z. Tsuzi\ Oct. 1902). 



This differs from Polygonum muricatum Meisn., by the narrow leaves 

 and the ovoid-globose akene. 



Polygonum (Echinocaulon) auriculatum Makino, sp. nov. non Meisu. 



Annual, bay- ferruginous when dried. Stem long and slender, decum- 

 bent and often radicant below, flaccid, ramose, sparsely or sparingly retrorsely 

 strigoso-pilose on the surface ; internodes shorter than the leaves. Leaves 

 very shortly petioled, the upper ones neaily sessile, linear-lanceolate, or 

 linear, but oblong-lanceolate in the basal ones, attenuated above and with, 

 an obtuse or acutish tip, auriculato-hastate or subcordate at the base, 

 flaccid-membranaceous, 2-1 1cm. long, |-2cm. wide, glabrous, but antrorsely 

 minutely ciliated on the margin, and the midrib very thinly antrorsely 

 pilose above and retrorsely so below beneath ; lateral veins not conspicuous, 

 many, patulous ; the basal auricles divaricate or subdivaricate, falcately 

 ova to-lanceolate or oblong, usually obtuse, attaining 13 mm. in length ; petiole 

 subglabrous, attaining 7mm. long; sheath long, attaining l|cm. long, 

 glabrous, not ciliated, with a retrorsely piloso-strigose ring at the base. 

 Peduncle lateral, patent, usually longer than the leaves, divaricately 2-3- 

 branched above, sometimes compound and provided with leafy bracts ; the 

 branches filiform, thinly glanduloso-hispid, attaining about 6cm. long; 

 bracts vaginate, short, obliquely truncate, glabrous, but often piloso-ciliated 

 or loosely ciliolate. Flowers 2-6-fasciculate, shortly pedicellate, 3 mm. 

 long, rose ; pedicel longer or shorter than the bracteoles, very laxly glanduloso- 

 pilose above; bracteoles pellucid- membranaceous, connate below, entire, 

 glabrous, longer than the bracts. Pt-rianth 4-cleft ; segments oval-;elliptical, 

 rounded-obtuse at the a[)ex. Stamens 4-6, included. Ovary ovoid ; 

 styles 3, connate excepting the u})i)er portion, nearly as long as the ovary. 

 Akene completely enclosed in the persistent perianth and shorter than 

 them, l|mm. across, subtrigonons-globose, minutely beaked with a short 

 base of the styles, minutely ruguloso-reticulated, nigro-castaneous. 



Bab. Prov. Tosa: Eno-mura in Hata-gori {T. Makino \ Aug. 5,1889), 

 Eyfi-mura (T. Maldno\ Oct. 16, 1892; S. Yano\ 1892), Asakura (7'. 



