Observations on the Flora of Japan. 



{Continued from p. 7G.) 



By 



T. Makino. 



Rhamnus (Eurhamnus) Yoshinoi Makino gp. nov. 



A shrub, divaricately or patently subopposite-raraose, loosely spinose, spines 

 terminating branehlets ; branches and branchlets terete, glabrous, purpulish- 

 brown and often with grey colour. Leaves deciduous, alternate on the 

 ' langtrieb ' but few-several-fasciculate on the ' kurztrieb,' chartaceo-mem- 

 branceous, obovate, cuneate towards the base, abru[)tly acuminate at 

 apex, mucronato-serrulafce, green and glabrate (thinly puberulent when 

 young) above, very slightly paler and thinly pubescent (punctato-piirplish 

 in old ones) beneath, 2-8 cm. long, 1-4 cm. broad ; midrib prominent 

 beneath ; lateral veins 8-6 on each side, ascending and arcuate ; veinlets 

 not conspicuous. Flower dioecious, pedicellate, one to a leaf-axil, ap- 

 proximately placed at the base of the ' langtrieb ' of this year and at the 

 top of the ' kurztrieb,' glabrous, yellowish-viridescent, G mm. long. Male 

 flower : pedicel gracile, glabrous, about as long as the flower. Calyx 4-fid ; 

 hires erect, subuiato-lanceolale, acuminate with a subcallose point, trinerved 

 without veinlets ; tube equal to or hardly shorter than lobes in length, ob- 

 conico-campanulate, acute at the base, disk very thin. Petals 4, inserted 

 to the throat, one-half as long as the calyx-lobes, thinly membranceous, 

 elliptical, acute, entire, one-nerved with a few and loose veinlets. Stamens 

 4, longer than petals but shorter than calyx-lobes ; filament subulate ; anther 

 linear, as long as the filament. Rudimentary pistil short and minute. 

 Female flower : pedicel gracile, glabrous, longer than the flower. Calyx 

 4-fid ; lobes erect, longer than the tube, subulato-lanceolate, acuminate 

 with a subcallose point, trinerved without veinlets; tube globose, the upper 

 portion deciduous as well as the lobes, disk very thin. Petals imperfectly 

 present or none, linear, entire or bifid above. Rudimentary stamens 

 minute, subulate. Pistil slightly exserted ; ovary free, globose, thick at 

 the apex, a little exserted from the remaining calyx-tube, 3-locular ; ovule 

 solitary in each loculament ; style erect, thickish, 3-sulcate, glabrous, 3-fid, 

 arms hardly shorter than the main portion, arcuato-erect-patent ; stigma 



