208 



HYDKOCHARIDE.E. 



C. Konishii. According to Jlr. T. IvawaivAmi, the trunk is nearly fifty feet 

 tall. and aboiit four feet in trirth. 



Hydrocharideee. 

 Hlyxa Thou. 



Blyxa [Diplosiphon) ecaudata Hayata sp. nov. (Fig. 77, c-f ) Planta in 

 af[ua immci'sa acaulis. Folia orania radicalia fasciculatim disposita lanceolatsi 

 circ. 6 cm. longa 4 mm. lata ai^ice acuminata vel acuminatissima basi {Bquilata 

 liaud attenuata tenuissime membrauacea. Scapi erecti apice uniflorati floribus 

 cxceptis 1-2 cm. longi, cum floribas circ. 10 cm. longi folia suijcrantes. Spatlia 

 ad apicem scapi sita fructifera cylindracea 3 cm. longa 1§ mm. lata apice atten- 

 uata breviter 2-lobata basi obtusa fructus perfecte 

 includens et eum superans glabra utroque latere 

 tenuiter costata. Flores apertientes ignoti. Flores 

 post anthesin vel fractiferi : calycis tubo (ovario 

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

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

 Petala 3 ? post authesin evanescentia. Fructus 

 lineari-cylindricus quam spatha brevior 2-2^ cm. 

 longus 1 J mm. latus, testa tenuiter membranacea 

 haud costata. Semina ellipsoidea Imm. longa vel 

 longiora latere uuo costata paucissime miu-icata, 

 testa crustacea, albumen copiosum. 



Hab. Hokuto, leg. Y. Shijl^da, Oct. 191.5 (Xo. 

 16, a). 



Near Blyxa ceratosjxrma Max.; but diflers 

 from it by the much nan-ower fruits with the less 

 mm-icate seeds. 



Blyxa [Dijdosiphon) laevissima Hayata sp. 

 nov. (Fig. 77, a and b). Herki atjuatica, caulis 15- 

 20 cm. longus 1 nira. latus tenuissimus. Folia alter- 

 na linearia circ. 3 cm. longa 1 J mm. lata apice 

 acuminatissima 1-nervia basi sessilia liaud contracta 



Fig. 77; a, :» flower of 

 Blyxi la.cissima Hayata x 3; 

 b, a seed of tlie same species 

 X 15; c.and d, seeds ot Bli/ia 

 ecmdala IIayata, peen from 

 diflerent sides X 15; e, the 

 saine, seed coat taken off X 15 ; 

 f, albumen, detached from tlie 

 same seed x 15 ; g, a seed of 

 Jihjxa Sliiiiiaddi IIayata x 15. 



