118 CYPERACEJE. 



what is meant by " septato-nodosa." After some considerations, I became con- 

 vinced that it means something like elevation of tessellate veinlets on the 

 surface of the leaves, and therefore it means " gegittert." According to his system 

 there are, however, included in the subgroup of " folia nunquam septato-nodosa " 

 many species which have " folia septato-nodosa ; " and there are also in the 

 subgroup of " folia septato-nodosa," many plants whose leaves are not " septato- 

 nodosa." On the whole, the clavis of the sections of the subgenus Euearex 

 given by KUKENTHAL is not practicable, as far as are concerned the 

 Japanese and Formosan species. As an example of the contradiction, I may 

 point out Garex alliiformis included after his system in the subgroup of 

 " folia nunquam septato-nodosa," and C. pumila referred to the subgroup of 

 "folia septato-nodosa." The leaves of the former species have distinctly 

 elevated tessellate veinlets, while those of the latter do not show any trace of 

 elevated veinlets. 



Conspectus of the subgenera of the Formosan Species. 



a. Spicules usually bisexual, sessile, cladoprophyllum (scale at the base of 

 spicules) mostly wanting . . .' subg. Vignea. 



b. Spicules bisexual or unisexual often pedunculate, cladoprophyllum 

 usually exists. 



a. Spicules usually bisexual, cladoprophyllum utriculi formed .... 



subg. Indocarex. 



/9. Specules mostly unisexual, cladoprophyllum ocreaeformed .... 



subg. Eucarex. 

 Subgenus Vignea NEBS. 

 Spicules at the apex. 



Sect. Foetidece C. pseudo-arenicola. 



Spicules at the base. 



Sect. Elongates : This is not represented in Formosa. 

 Carex pseudo-arenicola HAYATA sp. nov. (Fig. 35, f-j). Rliizoma 

 repens plus minus ascendeiis teres supra quasi-1-seriatim caules vel fascicules 

 foliorum gerens. Fasciculus foliorum 5-6-foliatus basi squamis oblongis apice 

 acutis 3-4 instructus, foliis linearibus cum vagina 17 cm. longis 2 mm. latis, 

 vaginis tubuliformibus 3 cm. longis circ. 2 mm. latis ore perfecte truncatis, 



