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THE BOTANICAL MAGAZINE. 



oval,; style 2-parted, arms arcuate outwards ; stigma capitate. 

 Achene included, small, 2^ mm. long, biconvex, oval, rounded 

 at the base, acutish and with a marcescent style at the apex, 

 smooth, shining, brownish-black 



Nom. Jap. Shima-himetade (nov.). 



Hab. Prov. SATSUMA : Isl. Takara-jima in Tokara Archi- 

 perago (S. Kawagoe ! Herb. Sc. Coll. Imp. Univ. Tokyo, Aug. 

 25, 1910). 



This species seems to me to come near Polygonum serrulatum 

 Lagasca, but the flowers are much smaller and the achenes are 

 smaller and constantly biconvex. 



Polygonum Yokusaianum Making, nom. nov. (Sect. 



Polygonum Posumbu Auct. Jap. non Hamilt. 



Polygonum cadspitosum y. laxijBorum Meisn. in Ann. Mus. 

 Bot. Lugd.-Batav. II. (1865-66), p. 57 ; Franch. et Say. 

 Enum. PI. Jap. I. (1875), p. 395. 



Polygonum laxidorum Making in Bot. Mag., Tokyo, XXV. 

 (1911), p. 14, non. Pall, nec Weihe. 



Annual, attaining about 6 decim. in height, flaccid. Stem 

 erect or ascending, ramose from the base, slender, terete, 

 glabrous, green, foliiferous throughout, laxly ramose into the 

 peduncles towards the top, usually prominent at the nodes. 

 Leaves petiolate, ovate to ovato-oblong, more or less abruptly 

 caudato-acuminate with an obtuse tip at the apex, cuneate at 

 the base, ciliated, membranaceous, thinly pilosulous above 

 (hairs denser on the midrib), thinly pilosulous on the midrib 

 and veins beneath, 2-9| cm. long, 1-3| cm. broad ; veins sev- 

 eral to subnumerous, erect-patent, arcuate upwards ; petiole 

 \—12 mm. long, thinly adpressed-pilosulous ; ochrea tubular, 

 adpressed-pilosulous, truncate and long-bearded at the mouth, 

 subscarioso-membranaceous, about cm. long. Racemes 



spike-hke, slender, laxly flowered ; rachis filiform ; peduncle 

 filiform and green. Flower-clusters loosely disposed, inter- 

 rupted in the basal ones ; bracts narrowly turbinato-tubular, 

 more or less obliquely truncate and long-ciliated af the mouth, 



