100 JUNCACEJ3. AROIDE^. 



glabro, stigmate terminal! globose 3-4 mm. lato basi 3-lobato fulvo. 



HAB. Shintikucho : Talang, Taiheito, ad 1900 ped. alt., leg. S. YAM ADA, 

 Aug. 1914. 



Near IMium cattosum S. et Z., but differs from it in the perianth-seg- 

 ments which are scarlet on the upper surface but light red on the back. 

 The segments of L. callosum are usually purple on the back. 



Juneaeeae. 

 Juncus LINN. 



Juncus leptocladus HAY ATA sp. nov. Annua. Caulis tenmssimus 

 glaber scandentissinius ramosissimus 26 cm. longus subteres gracillimus. 

 Folia radicalia linearia circ. 12 cm. longa 1 rnni. lata apice acurniuata basr 

 plus minus vaginata dorso complanata glaberrinia margine interiore tcnuissime 

 recurva , erecta tenuissiuia herbacea, vaginis 2-3 cm. longis latere uiio fissis 

 margine membranaceis. Flores laxissime cyrnosi breve vel longc pedicellati 

 basi bracteis 2 instructi, bracteis triangulari-ovatis apice acutis hyalinis 2 mm. 

 ongis 1 J- mm. latis glabris hand costatis haud iierv r osis. Perianthii segmenta 

 exteriora 3 laiiceolato-liiiearia 6 mm. longa f mm. lata apice acimiinata glabra 

 late 1 costata margine hyalina, segmenta interiora lineari-lanceolata 4 mm. 

 longa f mm. lata apice acuminata late 1-costata margine hyalina glabra. 

 Stamina 6, filamentis filiformibus 1 mm. longis glabris basi se brevissime cou- 

 natis, antheris linearibus 1 mm. longis -$ mm. latis utrinque obtusis. Ovariuni 

 glabrum lineari-ovoideuui circ. 1 mm. longum ^ nlrn. latum apice ad stylum 

 ^ mm. longum abeuns tri-sulcatuni trigonuni, stigmatibus 3 fidis. 



HAB. Arisan, ad 8000 pcd. alt., leg. U. FAUEIE, Juiiio 1914. 



Somewhat near Juncus bv/onius LINN., but widely different from it in 

 having far much longer perianth. 



Aroideae. 

 Ariscema MAET. 



Arissema arisanensis HAYATA sp. nov. Tuber depresso-globosum 2 cm. 

 lougum 3 cm. latum, radicibus a facie superiorc tuberis oriundis teretibus. Caulis 

 cum spadice 30 cm. longus glabor basi 13 mm. latus 1-2- vaginis instructus 



