210 HYDROCHARIDE.l'. 



lineares 2i mna. lougi apico obtiisi glabvi. Friictas cylintlrico-lincaris 3 cra. 

 longas 1^-2 mm. latiis apice ad tiibum calycis aLeuns basi obtusiLs multi-sper- 

 miis, testa membranacea. 8emina ellipsoiclea 1 J mm. longa ^ ram. lata brevc 

 cchinata uti-aque extremitate caudis instructa, caudis l^mm. lougis, testa 

 criLstacea, alburaen copiosiira. 



Hab. Taiholm: Koteisho, Hokuto, leg. Y. Shijiada, Juli. 1915 (No. 16, a et b). 



Near Blyxa ecMnosperma Clarice, liut diiFers from that in having three 

 petals in a single flower. 



Elyxa {Diplosiplion) Somai Hayata sp. nov. Herba af[uatica acaulis basi 

 radices fibrosas proftise emittens. Folia fasciculatim disposita omnia radicalia 

 linearia 30-40 cm. longa circ. 7 mm. lata apice acuminatissima basi haud 

 attenuata liaud contracta. Scapi uniflorati longissimi flore excepto circ. 25 cm. 

 longi gracillimi cum floribus circ. 45 cm. longi folia in longitudine supe- 

 rans. Spatha una ad apicem scapi sita florem siugulum iucludens, fnictifera 

 cylindrica 4-5 cm. longa 21 ram. lata apice attenuata 2-lobata basi obtusa utro- 

 que latere tenuiter costata membranacea. Flores ai^ertientes haud visi. Floras 

 jiost anthesin fructiferi : calycis tubiLs ovario exceijto 8 cm. lougus filiformis 

 1 mm. latus, lobis linearibus 6 mra. longis f mra. latis apice obtiLsis. Petala 

 post anthesin evanescentia linearia. Staraina 3 lobis calycis breviora, filamentis 

 filiforraibiLS 2 mra. longis. autheris liuearibus 2 mra. longis. Styli 3 basi ad 

 •| coaliti, partibiLs liberis 4 mra. longis linearibus aiiice obtuso-acutis. Fructus 

 cylindricus 5 cra. longus 2 mm. latus, testa tenuissime membranacea. Semina 

 ellipsoidea l^mm. longa ad utramr^ue extremitatera caudis instructa, caudis 

 1^-2 mm. lougis. 



Hab. Holmto, leg. H. Ixaba, 1911, Aug.; ibidom, leg. T. Soma, Feb. 1915. 



Veiy near Blyxa Shimadai, l)ut difters frora it by the far much longer 

 leaves and in the less echinate larger seecls. It may be a f >nn of B. Shimadai 

 growing in a deeper water. 



Ottella Pers. 



Ottelia alismoides Pers.; Foubes et Hemsl. Ind. Fl. Sin. III. p. 3. 



Hab. Uraisha, leg. S. Sasaki, Aug. 1910. 



Distrib. Ti'opical Asia, Japan aud North Aiistralia. Compared \nth a 

 Japanese specimen in the hcrbarium at Tdlvyd. 



