130 CYPERACELE. 



Sect. Rhomboidales. 



1. Male spicules lineari-cyllndrical. Female spicules cylindrical 2 



Male spicules often subclavate. Female spicules oblong or ovate 



C. arisanmsis. 



2. Scales obtuse C. obtusobracteata. 



Scales acute or caudate 3 



3. Culms lateral C. atronucula. 



Culms central O. chinensis. 



Carex arisanensis HAYATA (PI. XVIII.) Mater. Fl. Formos. p. 378- 

 Dense csespitosa ; rhizoma hand repens. Caulis tenuissimus primum erectus 

 sed frnctibus maturis deorsum recurvus trigonus ad angulos anguste alatus 

 interdum efoliatus basi squamis linearibus instructus, interdum foliis radicali- 

 bus et foliis caulinis basikribus suffultus gkber simplex vel interdum versus 

 apicem ramo singulo instructus ; squamis basi caulis 3 4-sitis. Folia 34 

 fesciculata (fasciculis basi squamis 3-4suffultis), cum vaginis 10 40cm. longa 

 cauli breviora vel sequilonga, vaginis 1 3cm. longis primum tubiformibus 

 demum toto fissis triquetris dorso promineiite carinatis utroque ktere apicis 

 auricuk 5 mm. longa apice obtusa f mm. lata latere altero cum kminis connata 

 ktere altero libera tenuissime membranacea Integra insfcructis gkbris ; kminis 

 linearibus 7-40 cm. longis 3-7 mm. latis apice lineari-aeuminatis, costa supra 

 impressa subtus carinato-elevata, utraque pagine gkbris margine scaberrimis 

 chartaceis suberectis. Caules vel rami caulis apice spiculas 1-3 gerentes, 

 spiculis se approximatis. Spicuk terminalis singuk masculina, iis kteralibus 

 foemineis vel bisexualibus bractea singuk instructis, bracteis spicam in loiigitu- 

 dine sequantibus vel earn superantibus ; spicuk lateralis breve vel loiige 

 pedicelkta, pedicellis basi vagina una instructis, vaginis tubiformibus 1 mm. 

 longis subventricosis hyalinis ckdoprophylli-forniibus ; spicuk masculina pedi- 

 celkta, (pedicellis 2 mm. longis haud vaginatis), subclavato-cylindrica 6 mm. 

 longa 1 mm. lata triquetra apice obtusa ; squamis mediis oblongis 2 mm. 

 longis 1 mm. latis apice obtusissimis integris 1-costatis basi rhachin complete 



