AROIDE.E. 247 



central! inter partes sito lanceolate 11 cm. longo 3 cm. lato apice acumi- 

 nato ad sumuium breve aristato basi cuneato sessili, segmentis partium singu- 

 larum 11, infirais longissimis superioribus gradatim brevioribus superrimis ad 

 3 cm. reductis, infimis longissimis oblanceolatis 20 cm. longis 3| cm. latis 

 apice acuminatissimis (acumine lineari) integris herbaceo-membranaceis basi 

 cuneato-attenuatis, inferioribus a se 3 cm. remotis. Scapi 80 cm. longi ad 

 longitudinem vaginis petiolorum involuti medio 8 mm. crassi glabri. Spatha 

 a basi usque ad medium tubiformis sursum limbiformis inter limbmn et 

 tubum plus minus constricta, tubo 6 cm. longo 13 mm. lato latere uno fisso, 

 limbo ovato-oblongo 6 cm. longo 3 cm. lato plus minus procurvo apice acumi- 

 nate basi constricto cum tubo leviter viridesceuti. Spadix $ toto glaber- 

 rinius Isevissimus stramineus teres apice longissime filiformis cum filis 30- 

 40 cm. longus basi rlorifer, parte florifera 4 cm. longa 4 mm. lata. Flores 

 densiuscule dispositi, antheris 2-3 subsessilibus 2-locularibus, loculis globosis 

 ; | mm. in diametro. 



HAB. Taihoku : Kinkwaryo, leg. TAKEO ITO, Mai. 1915. 



Near A. Thunbergii BLUME ; but distinguishable from it by the spathas 

 which in this new species are slightly greenish, and very much contracted 

 between the limbs and tubes, without making any reflexed margin at the 

 mouth of the tubes. 



Colocasia LUDW. 



Colocasia kotcensis HAY ATA sp. iiov. Rhizoma teres versus apicem IJcm. 

 crassum reliquis petiolorum dilatis obtectum. Folia ad apicem rhizomatis 4-5 

 fasciculatim sita longe petiolata, lamina triangulari-ovata 17 cm. longa 14 cm. 

 lata apice triangulari-acuta basi profunde cordata, lobis cordis auriculiforniibus 

 divaricatis angulo 60-90 a se egressis apice obtusissimis vel rotundatis (sinibus 

 cordis triangularibus), margine integra crassiuscule membranacea, venis venulis 

 parallelis, venulis secundariis minute tessellatis, utraque pagine glaberrima, petio- 

 lis 20-25 cm. longis glabris sursum teretibus deorsum vaginiforme dilatatis ad 

 basin extremitatis subito dilatatissiniis, parti bus dilatatissimis triangularibus 

 2 cm. longis totiusque latis vel latioribus rhizoma semi-amplectantibus. Scapi 

 cum spadice 20-25 cm. longi glabri. Spatha late obovato-oblonga 9 cm. longa 

 6 cm. lata dextrorsum convoluta in convoluto 3 cm. lata cylindrica apice acuta 



