Way. 1909.] MAKISO.— OBSERV. OS THE FLORA OF JAFA5. 87 



Nom. Jap. Midzu. 



Icon. Iinuma's Somoku-Dzusetsu, XX. n. 12. 



Hah. Prov. Musashi : Nakano near Tokyo (T. Alakinol), 

 Shimura (T. Makino !) ; Prov. Shimotsuke : Nikko (K. Sawa- 

 ta I herb. Sc. Coll. Imp. Univ. Tokyo ; T. Makino !) ; Prov. 

 Yamashiro : Mt. Hiei (T. Takahashi !) ; Prov. Oshima : Fuku- 

 shima (Y. Kudo !). 



This species comes near to American Pilea pumila A. Gray, 

 but the latter has the smaller female perianth, smaller nut, 

 thinner and larger leaves, stouter stem, 4— parted male perianth 

 and 4 stamens. It also seems to me to be closely allied to 

 P. mongolica Wedd. in DC. Prodr. XVI. 1, p. 135, which 

 I have not been acquainted. I have dedicated this species to 

 Baron A. Ilamao, Director of the Tokvo Imperial University. 



Pilea viridissima Makino, sp. nov. 



Pilea pumila Maxim, in Mel. Biol. IX. p. 631 (1876); 

 Franch. et Saw Knum. PI. Jap. II. (1879) p. 492 ; Makino in 

 Bot. Mag., Tokyo, X. (1896) p. 364, non A. Gray. 



Pilea petiolaris Franch et Sav. 1. c. I. p. 43S, quoad pi. 

 circa Yokoska lectam, non HI. 



A monoecious annual, about 18— 70cm. high. Stem erect, 

 but the base often shortly decumbent and rooting, often with 

 short or long branches, succulent, glabrous, smooth, the in- 

 ferior internodes elongate and more or less swollen. Leaves 

 petiolate, ovate, broad-ovate, or subrhombeo-ovate, caudato- 

 acuminatc with an obtuse or acutish tip in the superior ones 

 but shortly obtuso-acuminate in the inferior ones, broadly 

 cuncate or cuneato-obtusc and entire towards the base, coarse- 

 ly dentate with snbinenmbcnt-delt oid acute or aeutish or sub- 

 obtnse tipped teeth, think- membranaceous when dried, green 

 and very sparingly pilose or glabrous above, slightly paler and 



very thinly pilose beneath, dispersed with linear and gracile 

 cystoliths on both surfaces, triplinerved, with patulous veins, 

 1— 8£ cm. long, '-7 em. wide; petiole slender, 1 L0 cm. long, 

 glabrous; stipules small, ovate or ovato-oval, rounded-obtuse 



