T. Holm — Studies in the Cyperaceoe. 453 



ion, represents the most peculiar type among these ; this is C. 

 Fraseri. By the sti'ucture of its leaf, being destitute of 

 sheath, ligule and midrib in connection with the characteristic 

 inflorescence and rhizome,* this species would be better sepa- 

 rable from the other Car ices than any of the most highly 

 developed Yigneastra. 



Synopsis of the ^^ greges^ 



I. ViGNEJE. 



Brachystachyce nob. 

 Spikes several, short, few-flowered, sessile, remote or the 

 upper ones contiguous, gyngecandrous or, but seldom, androgy- 

 nous ; the bracts often conspicuous, but very narrow ; scales 

 mostly hyaline ; perigynia somewhat spreading, green or light 

 brown, ovate, mostly sessile, plano-convex, nervose, glabrous 

 or a little scabrous along the upper margins, sometimes spon- 

 gious at the base, the beak short, obliquely cut or almost 

 entire ; stigmata two. 



Centrales: C. trisperma Dew., tenuiflora Wahl., loliacea Schk., 

 macilenta Fr., canescens L., vitills Fr., helvola Bl., Bonan- 

 zaensis Britt. 



Besciscentes : C. niicrostachya Ehrh., tenella Schk. 



Neurochlmnm nob. 

 Spikes several, short but many-flowered, sessile, mostly con- 

 tiguous, gynsecandrous or the lateral w^iolly pistillate ; "bracts 

 inconspicuous ; scales brownish ; perigynia erect, brownish or 

 dark green, often shortly stipitate, elliptical to oval or roundish, 

 plano-convex, nervose, glabrous or scabrous above, the beak 

 very prominent, at least in the central types, slit on the convex 

 face, the orifice hyaline ; stigmata tw^o. 



HehetatcE: C. nardi7ia Fr., oreophUa Mey., iirsina Dew. 

 Centrales: C. glareosa Wahl., lagoplna Wahl., Pribylovensis 



Macoun, cryptantha Holm, neurochloena sp. n.,f heleonastes 



Ehrh., norvegica Willd. 



Argyraiithm nob. 

 Spikes several, mostly short and loose-flowered, sessile, con- 

 tiguous or the lower ones remote, gyngecandrous or the lateral 

 wholly pistillate ; bracts short and narrow ; scales hyaline or 

 light brown ; perigynia erect, membranaceous, light green, stipi- 

 tate, lanceolate, plano-convex, nervose, serrulate along the nar- 

 row margins, the beak long, bidentate ; stigmata two. 



Centrales: C. JDeweyana Schw., hromoides Schk. 



* This Journal, vol. iii, 1897, p. 121. 



f The diagnoses of the new species will he published in a subsequent paper 

 in this Journal. 



