Reprinted with permission from the New Britton and 

 Brown Illustrated Flora of the Northeastern United 

 States and Adjacent Canada, Vol. 1, page 253, Copyright 

 1952, The New York Botanical Garden. 



CYPERUS SCHWEINITZII 

 SCHWEINITZ' FLATSEDGE 



Schweinitz' Flatsedge is a grass-like perennial with stems that are 10-40 cm high, arising from short, irregularly swollen 

 rhizomes. The leaves are 1-4 mm wide and located mostly near the base of the plant. The inflorescence is subtended by 3-6 

 long, leaf-like bracts, some of which are wider than the leaves. The infloresence is made up of ascending clusters of flattened 

 spikelets that are 5-25 mm long and borne on stalks that are very short to long. The flowers are crowded opposite each other 

 and consist only of a small, pointed scale, which is ca. 3-4 mm long and subtends 3 stamens and an ovary. The seed is 

 triangular in cross-section. 



Flowering reported early July. Mature fruit from late June-August. 



This is our only perennial CYPERUS and is the only one occurring in upland habitat. 



