HYDROCHARIDE.E. 209 



sed caulem amplectantia. Spatha sessilis vel brevissiine pedunculata cylindrica 

 12 mm. longa 1^ mm. lata apice brevissima 2-lobata basi obtusa utroque latere 

 tenuissime costata. Calycis tubus (ovario excepto) filiformis 1-2 cm. longus Jmrn. 

 latus, lobis 3 oblongo-linearibus 2 mm. longis ^ mm. latis apice obtusis basi haud 

 contractis. Petala 3 linearia 6 mm. longa \ mm. lata apice acuto-obtusa calycis 

 lobis 2 J-plo longiora. Stamina 3, \\ mm. longa calycis lobis breviora. Styli 3 

 staminibus requilongi basi coaliti lineares apice obtusi. Ovarium cylindricum 

 8 mm. longum 1 mm. latum. Fructus cylindricus a spatlia ad 5 mm. exsertus, 

 testa tenuissime membranacea. Semina fusiformia 1 mm. longa \ mm. lata 

 plus minus oblique lasvissima, testa coriacea, latere uno tenuiter costata ; 

 albumen copiosum. 



HAB. Taihoku, Koteisho, leg. Y. SHIMADA, (No. 17) fl. et fr. 



Near Blyxa japonica MAX. and Blyxa caulescens MAX., but differs from 

 them by the much narrower fruits. I have examined several sets of the Japa- 

 nese species with the ripe fruits. The fruits of the Japanese species are nearly as 

 equal in length as those of the Formosan species, but as twice broader than those 

 of the latter. The spathse of the Japanese are strongly 6-nerved, but those of 

 the Formosan are very faintly nerved. 



Blyxa (Diplosiphon) Shimadai HAYATA sp. nov. (Fig. 77-g). Herba aqua- 

 tica acaulis basi radices fibrosas radiatirn profuse emittens. Folia fasciculatim 

 disposita omnia radicalia lineari-lanceolata circ. 12 cm. longa 7 mm. lata apice 

 acuminatissima basi gradatim attenuata, nervo centrali distincte viso, nervis 

 lateralibus tenuissime obscure visis, margine Integra membranacea tenuissima, 

 venulis transversis tessellatim dispositis, glaberrima. Scapi uniflorati erecti 

 *labri exceptis floribus 1-3 cm. longi apice interdum folia unica instructi vel 

 laud foliati. Spatha cylindrica ad apicem scapi sita florem singulum includens, 

 fructifera 3 cm. longa 1^-2 mm. lata glabra recta apice 2-lobata basi abrupte 

 icata utroque latere tenuiter costata tenuissime membranacea fractus singu- 

 lum perfecte includens. Flores apertientes non visi; flores post anthesin fructi 

 feri: tubo calycis (ovario excepto) 2icm. longo ^mm. lato glabro, lobis 3 lineari- 

 DUS 5 mm. longis 1 mm. latis apice obtusis glabris. Petala 3 linearia post 

 ithesin evanescentia. Stamina 3, filamentis filiformibus 2 mm. longis tenuissi- 

 lis, antheris linearibus 1| mm. longis ^ mm. latis apice acuminatis. Styli 3 



