CYPEEACEJE. '105 



bracts long. Rhachilla of spikelets winged. Glumes closely imbricate. 

 Stem at the base iiodosely thickened suddenly constricted into a 



long rhizome C. rotundas. 



Rhizome woody long-creeping, stem at top trigonous at base 



nodose C. stolonifer. 



Stolons elongate rather slender, stem tall at base bulbose woody ; 



C. tuberosus, 



Tall. Stolons 0. Leaves and bracts long. Umbel large compound? 

 spikes and spikelets many. Rhachilla of spikelets conspicuously 

 winged. Anthers apiculatc, not rarely crested, style (with its 3 

 branches) small. Nut small, ashy black. 



Spikes digitate scarcely peduncled long-cylindric dense, spikelets 

 linear 12-30-fld., glumes closely imbricate, wings of 

 rhachilla oblong persistent, anthers short-oblong not crested 



C. radiatus. 



Spikes (some) peduncled long cyliiidrie, spikelets very many 

 linear 8 20-fld., glumes closely imbricate, wings of rhachilla 

 oblong persistent, authors oblong not crested . . . . C. c.valtatus. 

 Umbel large compound, rays divaricate, spikes cylindric, spikelets 

 very many linear 6 40-fld., wings of rhachilla lanceolate 

 yellow soon desiduous, anthers linear-oblong scarcely crested* 



nut obi ong-obo void - length of glume C. digitatus. 



Cyperus procerus ROTTB. ; C. B. CLAEKE in HOOK f. Fl. Brit. Ind. 

 VI. p. 010 ; HEMSL. Ind. Fl. Sin. III. p. 215. 

 HAB. Hokuto, leg. T. SO.MA, Nov. 1914. 



Cyperus dense-spicatus HAYATA sp. uov. (Fig. 23-a-d). Caulis hand 

 ramosus circ. 1 in. altus acute triqueter glaber crectus. Folia pauca linearia 

 cum vaginis 60 cm. longa, laminis 7 mm. latis apice acumiiiatis margiue 

 integris hand scabris ; foliis caulinis nullis, bracteis basi inflorescentiie insitis 

 foliiforniibus 40-50 cm. longis 6 mm. latis iiifloresceiitiam in longitudine multo 

 exceedentibus glabris patcntissimis. Inflorescentia duplicato-umbellata sessilis 

 10 crn. longa 15cm. in diametro, radiis circ. 10 patentibus 10cm. longis 

 rectis simplicibus vel apice umbelluliferis, timbcllulis sessilibus circ. 5-radiatis, 



