T. Holm — Studies in the CyjperacecB. 457 



lateral pistillate ; bracts conspicuous, sheatliless ; scales mostly 

 dark ; perigynia erect, often purplish spotted or black, ellipti- 

 cal, sessile, somewhat compressed, few-nerved, minutely gran- 

 ular and, sometimes, scabrous along the upper margins, the 

 beak short, entire or emarginate ; stigmata three. 



Hehetatm: G. alpina Svv., melayicmtha Mey., melanocephala 

 Turcz. 



Centrales : C. atrata L., ovata Rudge, aterrima Hppe., hella 

 Bail., nigra All., chalclolepis Holm, nivalis Boott, ohscura 

 Nees, Mertensii Presc, Parryana Dew., stylosa Mey., acce- 

 dens nob.,* JRctynoldsii Dew., holostoma Drej., JBuxhaumii 

 Wahl., bifida Boott, quadrifida Bail., Gmelini Hook. 



Desciscentes : C. ustulata Wabl., venustida sp. n., Montanensis 

 Bail., microchceta sp. n., Tolmiei Boott, nigella Boott, spec- 

 tahilis Dew.f 



Microrhynchce- Drej. 

 Spikes several, often dense-flowered, sessile or short-pedun- 

 cled, contiguous or, sometimes, remote, the terminal staminate, 

 the lateral pistillate or the uppermost staminate or androgy- 

 nous ; bracts foliaceous, sheathless ; scales mostly dark and 

 obtuse ; perigynia erect, mostly light green, roundish to ellip- 

 tical, often stipitate, compressed, more or less prominently 

 nerved, granular and often scabrous along the upper margins, 

 the beak short, entire to emarginate ; stigmata two. 



Hehetatm : C. rufina Drej. 



Centrales: C. stricta Good., angustata Boott, rhondyoidea Holm, 

 prionopliylla Holm, coespitosa L., lugens Holm, Ynkonensis 

 Britt., Hindsii Clarke, decidua Boolt, vulgaris Fr., Thun- 

 hergii Steud., gymnoclada Holm, tricostata, Fr., turfosa Fr., 

 Ibnula Fr., angiiillata Drej., G-roenlandica Lge., rigida 

 Good., Fylloe Holm, hyperhorea Drej , Warmingii Holm. 

 chimaphila Holm, stans Drej., aquatilis Wahl., sphacelata 

 sp. n., chionophila sp. n., nitdata Boott, consimilis sp. n., 

 cyclocarpja sp. n., interrupta Bcklr., acutina Bail., limno- 

 c/iaris sp. n., variabilis Bail., lenticularis Michx., torta Boott, 

 acuta L., prolixa Fr., JBueckii Wimm., Sitchensis Presc. ,j 

 J^ebrascensis Dew., pulchella iiob.,§ notha Kth., laciniata 

 Boott. 



Desciscentes : C. scopulorum Holm, orbicularis Boott. 



^orastachyoe Drej. 



Spikes several, long and dense-flowered, long-peduncled, 



more or less drooping, remote, the terminal and uppermost 



lateral staminate, the others pistillate; bracts foliaceous and 



often very long, sheathless ; scales mostly dark, acuminate to 



* = spreta Bailey non Steudel, f = invisa Bailey. 



X ~ Howellii Bailey. § = Hallii Bailey non Boott. 



