Observations on the Flora of Japan 



(Continued from p. 106.) 

 By 



T. Makino. 



Aristolochia (Diplolobus) nipponica Makino, sp. nov. 



Glabrous ; stem volubile, herbaceous ; branches slender, sul- 

 cato-angulose when dried ; floriferous branchlets usually abbre- 

 viated. Leaves alternate, long-petiolate, deltoid-ovate, the base 

 cordato-auriculated with rotundate lobes and a widely open deep 

 sinus projecting in the form of deltoid-cuneate in centre, entire 

 on margin, membranaceous, subglaucous beneath, 3j-9cm. long, 

 3— 7Jcm. broad ; main veins 7 and palmate, the middle 3 sub- 

 parallel and the external ones divergent ; veinlets delicate ; petiole 

 slender, shorter than the blade, l|-4Jcm. long. Flowers 

 small, axillary, few-subnumerous-fasciculated, usually shorter 

 than the leaves, pedicellate ; pedicels gracile, much shorter than 

 the flowers, about 7—15 mm. long. Calyx about 3Jcm. long, 

 sessile on the ovary, unilabiate, thin ; utricle sphaerical, glabrous, 

 about 5mm. across ; tube narrow and cylindrical, about 2-2Jmm. 

 across, arcuate, glabrous externally, thinly glandular-pubescent 

 and pilose below internally, veins 6 and loosely reticulato-venuled 

 between veins ; lip erect, deltoid-lanceolate, setaceo-acuminate, 

 entire-margined, about 2cm. long, yellowish-brown (?) and 

 minutely thin-glanduloso-puberulent in face, glabrous externally, 

 with 5 longitudinal veins and finely reticulated veinlets between 

 the veins. Stamens 6 ; anther short and rounded, anther-cells 

 elliptical. Styline column short, exceeding the stamens in 



height, transversely 6-crenato-lobed on margin, the stigmatic 

 portion terminal, short, subhemisphasrical, 6— parted into the 

 closely placed short -falcate lobes. Ovary linear-cylindrical, 

 glabrous, about 5-8 mm. long. 



Nom. Jap. Maruba-no-umanosuzukusa (nov.). 



Hab. Prov. Idzumo : Iwasaka-mura in Yatsuka-gori, road 

 side (/. Mihara ! July 18, 1905). 



