Observations on the Flora of Japan, 



By 

 T. Makino, 



Assistant in the Botanical Institute, Science College, 

 Imperial University of Tokyo, 



Saxifraga (Difptera) nipponica Makino sp. nov. 



Rhizome cylindrical, long-creeping, radicant, epigreous, loosely ramose, 

 glabrous. Leaves tufted at the end of rhizome, erect, or ascending, flaccid, 

 long-petioled, orbicular or subreniform-orbicular, 2J-7 cm. wide, cordate at 

 the base, very obscurely lobed and dentate with depressed ovato-cleltoid 

 teeth on the margin, ciliated and disparsed with pilose hairs, palmately 

 veined ; petiole about 4-16 cm. long, slender, pilose with patent hairs, 

 vaginate and ciliated at the base. Scape including the panicle much exceed- 

 ing leaves and about 30 cm. in length, pilose with spreading hairs as is the 

 rachis, bearing a small rudimentary leaf. Panicle loose, broadly and 

 shortly pyramidal ; rachis more or less flexuous, with linear-subulate sharp- 

 tipped small bracts at bases of peduncles ; peduncles spreading, filiform, 

 strict, loosely branched into a few pedicels, with very small linear bracteoles 

 at bases of pedicels ; pedicels filiform, glandular-hairy as is the peduncle. 

 Calyx 5~partite ; tube short, adherent to the base of the ovary, depressed 

 obconical, glandular-hairy ; sepals more or less unequal in size, patent or 

 more or less reflexed, ovate-lanceolate, acutish, ciliated with glandular hairs, 

 herbaceous, 3-nerved, persistent. Petals 5, white, thin ; the lower 2 much 

 larger, unequal in size, pendulous, linear-lanceolate and more or less falcate, 

 gradually attenuated towards the sessile base, acuminate with a sharp tip, 

 entire, with veins running upwards, the larger one about 2 cm. long ; the 

 upper 3 patent, about 3 mm. long, ovate, apiculate, very shortly unguiculate, 

 entire, obscurely loose-nerved, slightly thicker and yellow in the lower por- 

 tion. Stamens 10, at first erect then patent ; filament linear- filiform, at- 

 tenuated towards the base, longer than sepals and 4-5 mm. in length ; 

 anther minute, ovato-rounded. Ovary broadly ovate, divided into 2 parts 

 above and attenuated to the styles, glabrous ; styles 2, erect, narrow ; stigma 

 very slightly thicker, oblique inwards ; ovules numerous, minute, oblong. 



Saxifraga sarmentosa f. minor Savatier in Iinuma's Somoku-Dzusetsu, 

 ed. 2, VIII. fol. 11, recto. 



Nom. Jap. Haru-yukinosliita (Y. Iinuma). 



Hab. Prov. Shinano : Mt. Togakushi (K. Watanubel June 10, 1894). 



A rare species ; it differs from S. sarmentosa, Linn, fil., by the esto- 

 loniferous habit and the ramose and long repent rhizome. 



