USGS - science for a changing world

Northern Prairie Wildlife Research Center

  Home About NPWRC Our Science Staff Employment Contacts Common Questions About the Site

Wetland Plants and Plant Communities of Minnesota and Wisconsin


(Eleocharis rostellata (Torr.) Torr.)

Beaked spike-rush

SEDGE FAMILY (Cyperaceae)


FIELD CHARACTERISTICS: A perennial spike-rush 40-100 cm. high (Figure 32a). Stems are leafless and stout, but conspicuously narrower than the spikelets (Figure 32b). Two stem types are present: fertile and vegetative. The vegetative stems are characteristically long and arching, and root at the tip. No other spike-rush (Eleocharis sp.) found in Minnesota and Wisconsin has this trait. The nutlet (Figure 32c) is 1.9-2.8 mm. long and three-sided to planoconvex.

ECOLOGICAL NOTES: This rare spike-rush is restricted to calcareous fens and calcareous shores. It may form dense stands. Beaked spike-rush is listed as a threatened species in both Minnesota and Wisconsin.

SOURCE: Gleason and Cronquist (1991); Swink and Wilhelm (1994); and Voss (1972).

Previous Section -- Sterile Sedge (Carex sterilis Willd.)
Return to Contents
Next Section -- Narrow-leaved Cottongrass (Eriophorum angustifolium Honck.)

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo logo U.S. Department of the Interior | U.S. Geological Survey
Page Contact Information: Webmaster
Page Last Modified: Saturday, 02-Feb-2013 06:31:27 EST
Sioux Falls, SD [sdww55]