260 T. Holm— Studies in the Cyperacece. 



Akt. XXIV. — Studies in the Cyperacece; by Theo. Holm. 

 XXXIV. Carices aeorastachyce: Glaucescentes nob., 

 and Limosce nob. (With 14 figures drawn from nature 

 by the author.) 



Glaucescentes. 



C. glaucesens Ell. (Figs. 1-3). 



The section seems, so far, to be monotypic, and C. glau- 

 cescens Ell. is confined to the southern States : Virginia 

 west to Missouri, and south to Florida. Eegarding the 

 affinity of the species Drejer 4 writes : 



"Affinitatem mihi accuratius inquirenti mox apparuit, ad 

 gregem Caricum aeorast achy arum. Habet enim spicam mascu- 

 lam solitarium ; bracteas foliaceas (saltern infimas), evaginatas, 

 subauriculatas ; spicas f emineas cylindricas, densinoras, pedun- 

 culatas, arrectas demum pendulas; perigynia membranacea, 

 nervata, arete caryopsin includentia ; rostrum brevissimum sube- 

 marginatum. C. glaucescens a ceteris sui gregis satis distincta 

 est squamarum insigni forma, quamquam nisus in earn in 

 squamis C. rariflorae apparet. Inter americanas nullam scio, 

 quam hnic proxime aninem posuerim, neque inter europaeas ; in 

 India orientali autem plures affines videntnr habitare." 



By Kiikenthal 2 the species is a member of his Paludosce 

 (minime Fries), and placed between C. brasiliensis St. 

 Hil. and C. paludosa Good ; nevertheless this same author 

 considers C. Joorii Bailey to belong to the remote section 

 Maxima, although C. Joorii is identical with C. macro- 

 holea Steud. and this C. macrokolea Steud. is by Kiiken- 

 thal reduced to a mere form of C. glaucescens — the inevi- 

 table result of compilation without material for com- 

 parison. 



Drejer gives an excellent illustration of C. glaucescens, 

 and from his diagnosis the points as follow may be 

 quoted : 



"Perigynia matnra sqnamis latiora et longiora, ovato-trigona, 

 crassa, caryopsin arete includentia, membranacea, laevia, tenuis- 

 sime granulata, rostro brevissimo subemarginato. Caryopsis 

 brevis, crassa, obovata, trigona, lateribus excavata, stylo longo, 

 robusto, laevi, continuo, semper exserto terminata. ' ' 



1 Symbols CaricologicaB. Copenhagen, 1844, p. 14. 



2 In Engler : Das Pnanzenreich, Leipzig, 1909. 733. 



