Observations on the Flora of Japan. 



(Continued from p. 75.) 



By 



T. Makino. 



Assistant in Botany, Science College, 

 Imperial University of Tokyo. 



Cynocrambe japonica Makino in Bot. Mag., Tokyo, 

 VIII. (1894) p. 348; Matsum. Shokubutsu Mei-i (1895) p. 98, 

 n. 1051. 



Thelvgonum japonicum Okubo et Makino in Bot. Mag., 

 Tokyo, III. (1889) p. 5. 



Thelvgonum sp. Makino in Bot. Mag., Tolvvo, I. (1S87) p. 

 169, tab. 20. 



Perennial, monoecious, about 12— 29em. high; roots fibrous, 

 tufted ; rhizome very short, rooting. Stem laxh r ramose below ; 

 flowering one erect, but the sterile branches at first ascending 

 and then after anthesis dcclinated at length considerably elon- 

 gated prostrate and radicant at nodes (the intcrnodes perish in 

 late autumn and the rooting nodes having the new buds so form 

 a new stock), terete, with a pubescent (pubes retrorso-incurved) 

 line at the one side, the middle internodes of the flowering stem 

 usually elongated. Leaves opposite and the pairs remote, 

 petiolate, ovate to narrowly ovate, but ovato-elliptical or 

 ovato-lanceolate in the superior ones and rhombeo-oval in tin- 

 basal ones, short-acuminate ;it the apex, rounded or obtuse and 

 slightly decurrent to the petiole at the base, entire, ciliated, thin- 

 ly pubescent above and very thinly so beneath, membranaci 

 nigrescent when dried, .',-.'!! cm. long, J— 2cm. broad; veins 

 loose, 2-1- on each side, erect-patent, arcuate upwards; petiole 

 usually shorter than the blade, bu1 longer than in the inferior 



ones; BtipuleS in terpctiol.'i r, shortly connate .'it tin- base, .'un- 



plexicaule, much shorter than the petiole, deltoid "i subulato- 

 deltoid, membranaceous, often very sparingly ciliated. Bracts 

 leaf-like, alternate, remotely disposed, petiolate, ovate, o> 

 elliptical, bul ovato-lanceolate in the superior one-, Bhortrj 



