DIOSCOREACEE. 39 
latum medio sursum 6-lobatum, lobis late triangularibus apice acutis patenti- 
bus glabris; staminibus 3, filamentis } mm. longis glabris, connectivis dilatatis, 
loculis antherarum remotis ; staminodiis 3 minutis; rudimentum ovarii minu- 
tum conicum apice 3-fidum. Fl. ¢: spicati, spicis solitariis 5cm. longis 
glabris gracillimis triquetris ; floribus sessilibus ad nodos solitariis basi bractea- 
tis, bracteis late ovatis 14 mm. longis 1mm. latis apice cuspidatis; ovarium 
inferum 5mm. longum 1mm. latum glabrum triquetrum; perianthii lobis 
rotundatis 2mm. longis et latis glabris; staminodiis 6 minutis; stylo colum- 
niformi 4mm. longo apice 3-fido, segmentis recurvis. Capsule cum alis 
obcordatz 2cm. longsx totiusque late apice leviter cordate basi obtuso- 
rotundate. Semina valde complanata rotundata circumcirca ala membranacea 
cincta.- 
Dioscorea Tokoro Hayata Gen. Ind. p. 84 (non Maxrno). 
Has. Kelung, leg. B. Hayata (typus!); Busegan, Seisui, Keitao, Taroko, 
Shinjio, Batakan, Gaogan. 
Near Dioscorea 'Tokoro, but differs from it in the much _ broader 
capsules. 
Dioscorea Matsudai Hayara sp. nov. (Fig. 20). Volubilis ; caulis com- 
planato-teres glaber gracilis. Folia opposita vel alterna lanceolata vel oblongo- 
lanceolata chartacea 6-9 cm. longa 23-3 cm. lata apice acuta vel acuminata basi 
rotundata vel obtusa. utraque glabra 5-nervia, petiolis 2cm. longis glabris 
gracilibus. Flores 3 paniculati, paniculis axillaribus solitariis 5-6 cm. longis 
ramosissimis, floribus ad nodos solitariis basi bracteatis, bracteis ovato-triangu- 
laribus 3.mm. longis cuspidatis ; perianthii segmentis 6, exterioribus 3 majori- 
bus rotundatis 12 mm. in diametro glabris valde concavis, interioribus minori- 
bus ; staminibus 6, filamentis complanatis glabris 4mm. longis, antheris 
oblongis 4mm. longis. Capsulz cum alis 33-4 cm. late 2} cm. longe breve 
stipitatee. . 
“Has. Monte’ Buisan, leg. Y. Marsupa, Juli. 1918, (typus!); inter 
Karapin et Suishary6, Kelung, Ochébi, leg. B. Hayata. 
Near D. rhipogonoides, but differs from it in having much thinner leaves ; 
also allied to D. oppositifolia, but distinguishable from it in the much longer 
male spikes. 
