MATERIALS FOR A FLORA OF FORMOSA. 371 



AHsœnia Mart. 



Arisaema alienatum var. formosanum Hayata n. v. Herba erecta 

 glabra majiiscula cum petiolis 60 cm. alta 1-foliata, foliis flori- 

 busqiie cosetaneis. Folia longe petiolata verticillatim circ. 13- 

 secta, segmentis oblongo-oblanceolatis 20 cm. longis 4 cm. latis 

 apice acuminatis vel ciispidato-acuminatis basi longe attenuatis 

 supra basin 2 mm. -latis basin plus minus leviter dilatatis 3 mm. 

 latis, petiolis robustis rectis 60 cm. longis basi 7 mm. in sectione 

 a medio usque ad basin vaginiformibus pedunculum involventibus 

 basi vaginatis, vaginis 13 cm. longis membranaceis discoloribus 

 apice obtusissimis multinerviis, basi tubiformibus, tubis 2i- cm. 

 longis. Pedunculus floris Ç solitarius elongatus 25 cm. longus, 

 partibus vaginiformibus petiolorum involucratus, sursuni leviter 

 recurvus liber. Spatha oblongo-lanceolata caudata cum tnbo 14 cm. 

 longa 2J cm. lata, tubo ventricoso-oblongo. Spadix inclusus 

 cylindrico-conicus 17 mm. longus 8 mm. latus, appendice longe 

 filiformi 6 cm. longa recui'va a medio deorsam tuberculis filiformi- 

 bus ascendento-rocurvis instructa, (tuberculis 3 mm. longis a latere 

 compressis basi dilatatis). Flores diœoii. Fl. Ç : Ovarium hexagono- 

 obovoideum l\ mm. longum 1-loculare 3-ovulatuin, stylo subnullo, 

 stigmate pulvinato rubro-marginato. 



Hab. Shintiku, leg. T. Kawakami et K. Watanabe, 1907, 

 Aprili. 



Very like the type, fi'o:n wliicli this is distinguisliable by 

 the much slender spadix. Also near A. neglectum Schott, A. 

 Leschenaaltii Blume and A. consangtdneum Schott ; but differs 

 from them in having spadix with a long hairy thread-like 

 appendage. 



