Observations on the Flora of Japan 



{Continued from p. 130.) 



By 

 T. Makino. 



Trillium apetalon Makino, sp. nov. 



Trillium Smallii Maxim, in Mel. Biol. XI. p. 862 (1883), 

 pro parte. 



Trillium erectum var. japonicum A. Gray, Bot. Jap. in Mem. 

 Amer. Acad. Art. a. Sc. n. ser. YI. (1859), p. 413, pro parte. 



Rhizome thick, short-cylindrical, erect or oblique, with stout 

 fibrous roots, accompanied by the basal remains of old stems 

 and membranaceous brown vaginae at the top. Stems 1 or 2, 

 erect, terete, slender, or sometimes thick (in the northern ones), 

 glabrous, green, attaining about 35cm. in length. Leaves 3, 

 equal in size and form, verticillate at the top of stems, spread- 

 ing, sessile, depressedly rhombeo-obovate or rhombic, abruptly 

 cuspidato-acuminate at the apex, broadly cuneate towards the 

 base, 5-14cm. long, lj-13cm. broad, herbaceo-membranaceous, 

 glabrous ; main nerves 3, or sub-5 ; lateral ones arcuate in- 

 wards, branching with main veins outwards. Flower solitar}', 

 peduncled ; peduncle erect, glabrous, 17— 45mm. long. Sepals 3, 

 equal, sessile, erect-patent, narrowly oblong, ovato-oblong, or 

 ovato-lanceolate, obtuse or acutish or subacuminate at the 

 apex, entire, herbaceous, virid-purpurascent or rubro-purpuras- 

 cent, glabrous, 12-25mm. long, 6-14mm. broad, persistent ; 

 main nerves about 5 ; veinlets loosely anastomosing above. 

 Petals constantly 0. Stamens 6, equal to or a little exceeding 

 the pistil, erect, glabrous, 7-10mm. long, persistent ; filament 

 subulato-linear, dilated towards the base, yellowish-pallid above, 

 often dark-purpurascent below ; anther oblong or broadly 

 oblong, truncato-rounded often with an obtuse point at the 

 apex, introrse ; cells linear ; connective purpurascent. Ovary 

 sessile, ovoid-globose or conico-globose, shallowly 6-sulcate 

 and 6-ridged, 3-locular, glabrous, viridescent or dark-purple, 



