130 CYPEKACEvE. 



Sect. Rhoinboidales. 



1. Male spicules lincari-cylindrical. Female spicules cylindrical 2 



Male spicules often subclavatc. Female spicules oblong or ovate 



C. arisanensis. 



2. Scales obtuse C. obtitsobracteata. 



Scales acute or caudate 3 



3. Culms lateral C. atronucula. 



Culms central O. chinensis. 



Carex arisanensis HAYATA (PL XVIII.) Mater. Fl. Fonnos. p. 378- 

 Dense csespitosa ; rhizoma hand repens. Caulis teiiuissimus priniuui erectus 

 sed fructibus maturis deorsum recurvus trigonus ad aiigulos anguste alatus 

 interdum efoliatus basi squamis linearibus iiistructus, interdum foliis radicali- 

 bus et foliis caulinis basilaribus suiftiltus glaber simplex vel interdum versus 

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

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

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

 demum toto fissis triquetris dorso prominente carinatis utroque latere apicis 

 auricula 5 mm. longa apice obtusa f mm. lata latere altero cum lamiuis connata 

 latere altero libera tenuissinie membrauacea integra iustructis glabris ; laminis 

 linearibus 740 cm. longis 3-7^ mm. latis apice lineari-acuminatis, costa supra 

 impressa subtus carinato-elevata, utraque pagine glabris niargine scaberrimis 

 chartaceis suberectis. Caules vel ranii caulis apice spiculas 13 gereutes, 

 spiculis se approximatis. Spicula terminalis singula masculina, iis latcralibus 

 foemineis vel bisexualibus bractea singula instructis, bracteis spicam in longitu- 

 dine sequantibus vel earn superantibus ; spicula lateralis breve vel longc 

 pedicellata, pedicellis basi vagina uua iustructis, vaginis tubiformibus 1 mm. 

 longis subventricosis hyalinis cladoprophylli-formibus ; spicula masculina pedi- 

 cellata, (pedicellis 2 mm. longis hand vaginatis), subclavato-cyliiidrica 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 



