T. Holm — Studies in the Cyjperacec^. 459 



DactylostachycE Drej. 

 Spikes several, lax and few-flowered, peduncled, erect or 

 somewhat drooping, contiguous, seldom remote, the terminal 

 staminate, the lateral pistillate ; bracts sheathing, but often 

 bladeless ; scales reddish brown, obtuse; perigynia erect, dark 

 green, elliptical, trigonous, stipitate, nervose, pubescent, the 

 beak short, straight with oblique orifice ; stigmata three. 

 Hebetatce: C. grallatoria Maxim., heteroclita Fr. et Sav., hiimilis 



Leyss. 

 Centrales: C. digitata L., ornithopoda Willd., ornithopodioides 

 Hsm., concinna R. Br., cmiphora Fr. et Sav., Brenyieri 

 Christ., pediformis Mey., lanceolata Boott, Richardsonii R. 

 Br., conica Boott, peduiiculata Muehl., Halleriana Asso, 

 3oottiana Benth., JBaltzellii Chapm., Linkii Schk., illegitima 

 Cesati, cryptostachys Brongt. 

 Desciscens : C. triquetra Boott. 



Trachychlcenm Drej. 

 Spikes several, cylindrical, dense-flowered, peduncled and 

 nodding, remote or the upper ones contiguous, the terminal 

 staminate, the lateral androgynous or wholly pistillate ; bracts 

 foliaceous with very short sheaths ; scales dark, acute ; perigy- 

 nia somewhat spreading at maturity, purplish spotted, ovate to 

 subglobose, sessile, faintly nerved, minutely hairy or scabrous, 

 the beak short, emarginate to subbidentate ; stigmata mostly 

 three. 

 Centrales : C. glauca Scop, virescens Muehl., triceps Michx., tri- 



nervis Peg!., hispida Schk., setigera Don. 

 Desciscens : C. spissa Bail. 



3Iicrocarp m K u ek th 1 . 

 Spikes several, cylindrical and often very long, more or less 

 dense-flowered, peduncled, nodding, remote or the upper ones 

 contiguous, the terminal staminate, the lateral pistillate or, 

 sometimes, the upper ones androgynous ; bracts foliaceous 

 with long sheaths ; scales hyaline to light green or brown, 

 acute ; perigynia often small to the size of the plants, some- 

 what spreading at maturity, light green, elliptical, trigonous 

 and sometimes turgid, sessile, nervose, glabrous, the beak 

 short with the orifice entire, oblique ; stigmata three. 

 Centrales: C. microcarj^a Bertol., 3Ien dochiensis Olney, strigosa 



Huds., gracillima Schvv,, maxima Scop. 

 Desciscentes : C. oxylepis Torr. et Hook., Davisii Schw. et Torr., 

 formosa Dew. 



Athrochloenm nob. 

 Spike single, androgynous, dense-flowered, the pistillate por- 

 tion squarrose at maturity : scales lanceolate or oblong, obtuse, 

 deciduous ; perigynia shining brown, erect, but reflexed at 



