208 



HYDllOCH ARIDE <E. 



C. Konislui. According to Mr. T. KAWAKAMI, the trunk is nearly fifty feet 

 tall, and about four feet in girth. 



Hydroeharidese. 



Blyxa Tnou. 



Blyxa (DiplosipJion) ecaudata HAYATA sp. nov. (Fig. 77, c-f.) Planta in 

 aqua immersa acaulis. Folia omnia radicalia fasciculatim disposita lanceolata 

 circ. 6 cm. longa 4 mm. lata apice acuminata vel acuminatissima basi requilata 

 hand attenuata tenuissime membranacea. Scapi erecti apice uniflorati floribus 

 exceptis 1-2 cm. longi, cum floribus circ. 10 cm. longi folia superantes. Spatha 

 ad apicem scapi sita fructifera cylindracea 3 cm. longa If mm. lata apice atten- 

 uata breviter 2-lobata basi obtusa fructus perfecte 

 includens et eum superans giabra utroque latere 

 tenuiter costata. Flores apertientes ignoti. Flores 

 post anthesin vel fructiferi : calycis tubo (ovario 

 excepto) circ. 4 cm. longo circ. 1 mm. lato, lobis 3 

 linearibus 5 mm. longis f mm. latis apice obtusis. 

 Petala 3 ? post authesin evanescentia. Fructus 

 ] ineari-cylindricus quam spatha brevior 2-2 J cm. 

 longus 1 J mm. latus, testa tenuiter membranacea 

 hand costata. Semina ellipsoidea Imni. longa vel 

 longiora latere uuo costata paucissiine muricata, 

 testa Crustacea, albumen copiosum. 



HAB. Hokuto, leg. Y. SHIMADA, Oct. 1915 (No. 

 16, a). 



Near Blyxa ceratosperma MAX.; but differs 

 from it by the much narrower fruits with the less pig. 77; a, a flower of 



muricate Seeds. Blyxa l&vissirna HAYATA x 3 ; 



b, a seed of tlie same species 



Blyxa (Diplosiphon] Isevissima HAYATA sp. x 15; c, and d, seeds of Blyxa 

 nov. (Fig. 77, a and b). Herba aquatica, caulis 15- eccm<tea HAYATA, seen from 



different sides X 15 ; e, the 



cm. longus 1 mm. latus tenmssimus. Folia alter- same> ed coat taken off x 15 ; 

 na linearia circ. 3 cm. longa li mm. lata apice f) albumen > detached from the 



,. . same seed X 15 ; g, a seed of 



acuminatissima 1-nervia basi sessilia hand contracta myxaShimadai HAYATA x 15. 



