XYRIDE/E. 237 



lata plus minus complanata glabra fuscentia, testa tenuissime membranacea 

 hyalina ; albumen copiosissimum fuscens ; embryo extremitate albuminis situs 

 linearis 3| mm. longus f mm. latus. 



HAB. Shintiku : Gakokitsu, leg. K. WATANABE, (fl. et fr. typ.!) ; in monti- 

 bus Kappanzan, leg. U. MORI et Y. SHIMADA, Mart. 1910 (fl.) ; Nanto : Bibyo- 

 naisan, leg. U. MORI, Juli. 1907, (No. 3492, fl.). 



The present species is somewhate near to the Japanese congener, R. japonica 

 ROTH, in the habit, leaves and in the spikes ; but greatly differs from it in 

 the very much longer bracts, in the patent flowers and in the stipitate anthers. 

 Very distinct species. 



Xyridese. 

 Xyris LINN. 



HOOK. f. Fl. Brit. Ind. IV. p. 365 ; BENTH. FL Hongk. p. 378 ; BENTH. et 

 HOOK. f. Gen. Plant. III. p. 842 ; ENGLER in Pfl.-fam. II-4 p. 20 ; DUNN et 

 TUTCHER Fl. Hongk. et Kwangt. p. 282. 



Xyris formosana HAYATA sp. nov. Herba scirpiformis scapifera, radicibus 

 fibrillosis multissimis. Folia omnia radicalia coespitosa angustissime linearia 

 plana hand teretia 10-25 cm. longa 1-3 mm. lata apice acuminata basi caulem 

 amplectaritia longissirne vaginata interdum usque ad medium vaginiformia mar- 

 gine integra haud serrulata crassiuscula sub microscopio ad paginam margin em- 

 que minute muricata apice haud aristata. Scapi folia in longitudine valde 

 excedentes vel iis breviores 10-40 cm. longi teretes glabri lasves haud ramosi 

 simplices minus vel plus quam 1 mm. in diametro sectionis. Flores ad apicem 

 scapi capitatim siti, capitibus depresso-globosis circ. 1 cm. latis 8 mm. longis 

 apice rotundatis basi truncatis, bracteis rigido-coriaceis obovato-rotundatis 5 mm. 

 longis 4 mm. latis utraque pagine glabris extus valde convexis intus valde con- 

 cavis apice rotundatis basi late leviter cuneatis ad insertionem 2 mm. latis stirsum 

 medio castaneis versus marginem pallidioribus medio crassiusculis ad marginem 

 tenuissimis apice dorso apiculis brevissimis vel obsoletis instructis margine 

 integris intus valde concavis florem ununi amplectantibus ; bracteolis lateralibus 

 duabus hyalinis tenuissime membranaceis ecoloratis plicatis in explicate obovatis 

 4J mm. longis apice late acutis vel obtusis basi cuneatis dorso medio crasso- 



