73 



Polygonatum Periballanthus (Franch. et Sav.) Makino in Bot. 

 Mag., Tokyo, XII. 1898, p. 228. 



Periballanthus involucrattis Franch. et Sav. Eniim. PI. Jap. II. p. 

 524. 



Polygonatum involucratum Maxim, in Mel. Biol. XI. p. 844, 



Hah. Prov. Musashi : Shibuya {T. Maldno\ Apr. 27, 1891), Tokyo, 

 Bot. Gard. Koisliikawa, cult. (Herb. ! Sc. Coll. Imp. Univ. Tokyo, May 2.3, 

 1881, April 30, 1883); Prov. Tosa : Sakawa, cult. {T. 3Iakino\ May, 2.5 

 1887, May 17, 1892). 



Var. ibukiense Makino 1. c. p. 229. 



In volucral- bracts 4, small. Flower small, 2-4-fasciculate within the 

 in volucral- bracts. 



Icon. linuraa's S5moku-Dzusetsu VI. fol. 5 recto. 



Dioscorea Tokoro Makino in Bot. Mag., Tokyo, III. 1889, p. 112; Id. 

 lUustr. Fl. Jap. I. n. 4, 1889, p. 1, tab. XXIV. et n. 7, 1891, p. 4. 



Rhizome subterranean, repent, solid, thick, branching, rooting. Stem 

 voluble, sinistrorse, terete, often slightly striate. Leaves alternate, petiolate, 

 rounded-ovate, reniform-ovate, or often ovate in the superior ones, subauriculato- 

 cordate at the base with a deep or widely opened sinus and rounded lobes, 

 rather abruptly acuminate with a very tapering point, entire or very scarcely 

 lobate-waved, firmly herbaceous, but membranaceous when dried, glabrous, 

 green and shining obove, paler beneath, 4-1-19 cm. long, 3-16 cm. broad; 

 main-nerves 7-9, radiating from the ba^e, prominent beneath, the lateral 

 ones curved, the outermost one with a branch outwards ; transverse veinlets 

 numerous ; petiole slender, shorter than the blade, glabrous, shallowly 

 canaliculate in front, slightly enlarged and purple at both ends. 5: Raceme 

 angustate, ascending, but then often pendulous ])y its weight, attaining about 

 50 cm. in length, solitary to a few in the leaf-axils, simple or divaricately 

 few-branched, or sometimes paniculate ; rachis slender, triquetrous, glabrous, 

 green ; bract minute, subulate, very sharply tapering, shorter than the 

 pedicel ; bracteoles smaller than the bract, subulate. Flower 4-4i mm. 

 across, pedicellate, 2-many-fasciculate in subscorpioid manner with an ex- 

 tremely short peduncle, the fascicles laxly or more or less densely disposed 

 on the rachis ; peiiicel shorter than the diameter of flowers, triquetrous. 

 JFlower-bud obovoid, slightly flattened at the top. Perianth G-parted, 



