DIOSCOREACE.2E. 39 



latum inedio sursuin 6-lobatum, lobis late triangularibus apice acntis patenti- 

 bus glabris ; staminibus 3, filamentis J mm. longis glabris, conuectivis dilatatis, 

 loculis antherarum remotis ; staniiuodiis 3 minutis ; rudimentum ovarii minu- 

 tum conicuni apice 3-fidum. Fl. $ : spicati, spicis solitariis 5 cm. longis 

 glabris gracilliniis triquetris ; floribus sessilibus ad nodos solitariis basi bractea- 

 tis, bracteis late ovatis 1|- mm. longis 1 mm. latis apice cuspidatis ; ovarium 

 inferum 5 mm. longum 1 mm. latum glabrum triquetruin ; perianthii lobis 

 rotundatis f mm. longis et latis glabris ; stamiuodiis 6 minutis ; stylo colum- 

 niformi -|- mm. lougo apice 3-fido, segmentis recurvis. Capsule cum alis 

 obcordaiaa 2 cm. longpe totiusque latee apice leviter cordatee basi obtuso- 

 rotundatee. Semiua valde coniplanata rotuudata circumcirca ala inembranacea 

 cincta. 



Dioscorea Tokoro HAYATA Gen. Ind. p. 84 (nou MAKING). 



HAB. Kelung, leg. B. HAYATA (typus !) ; Busegau, Seisui, Keitao, Taroko, 

 Sliiujio, Batakau, Gaogan. 



Near Dioscorea Tokoro, but differs from it in the much broader 

 capsules. 



Dioscorea Matsudai HAYATA sp. nov. (Fig. 20). Volubilis ; caulis com- 

 plauato-teres glaber graciHs. Folia opposita vel alterna lanceolata vel oblongo- 

 lanceolata chartacea 6-9 cm. louga 2 J 3 cm. lata apice acuta vel acumiuata basi 

 rotundata vel obtusa utraque glabra 5-nervia, petioHs 2 cm. longis glabris 

 gracilibus. Flores J paniculati, pauiculis axillaribus solitariis 5-6 cm. lougis 

 ramosissimis, floribus ad nodos solitariis basi bracteatis, bracteis ovato-triangu- 

 laribus | mm. longis cuspidatis ; perianthii segmentis 6, esterioribus 3 rnajori- 

 bus rotundatis 1 1 mm. in diametro glabris valde concavis, interioribus minori- 

 bus ; staminibus 6, filamentis cornplanatis glabris 4- mm. longis, antheris 

 oblougis -\ mm. longis. Capsules cum alis 3-4 cm. latse 2J cm. longae breve 

 stipitatse. 



HAB. Monte Buisau, leg. Y. MATSUDA, Juli. 1918, (typus !) ; inter 

 Karapin et Suisharyo, Kelung, Ochobi, leg. B. HAYATA. 



Near D. rlripogonoides, but differs from it in having much thinner leaves ; 

 also allied to D. opposUifolia, but distinguishable from it in the much longer 

 male spikes. 



