52 T. Holm — Studies in the Oyperacece. 



The inflorescence of S. Baldwini Steud. 



and S. gracilis Ell. is principally the same 



A j as we have described for S. pauciflora 



1 ^ r\ ' Muhl., with the only exception that the 



l\ 1 1/ 1 // spikes are here gathered in compact fascicles 

 Zdi.\|f f/.fjb'- at the a P ex °f tne stem. Scleria hirtella 

 X y f f Swtz. and S. verticillata Muhl. exhibit, on 



\ \f / the other hand, a very different position of 



\<Y the spikes, since these are here situated in 



| ( sessile, roundish fascicles along the stem with 



the subtending bracts very short and bristle- 

 Fig. 5. staminate shaped. Otherwise the minor structure of 

 Ration if S™ the spikes is the same as described for S. 

 pauctflora. 

 The North American representatives of our genus show 

 thus a very uniform arrangement of flowers and minor inflo- 

 rescences, and they belong to the group a Spieatse " of Boecke- 

 ler (1. c), well distinguished from the other groups " Panicu- 

 late " and " Corymbosse." The structure of the inflorescence 

 in our species of Scleria does not therefore furnish characters 

 sufficient for the distinguishing of species. Such characters 

 must be sought in the shape and structure of the pericarp, and 

 in the peculiar perianth, both of which have Deen described so 

 very carefully by Boeckeler in his work, to which we have so 

 often referred. 



Washington, D. C, June, 1891. 



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