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

RATTLESNAKE MANNA GRASS

(Glyceria canadensis (Michx.) Trin.)


Rattlesnake manna grass

GRASS FAMILY (Gramineae or Poaceae)

IND. STATUS: 0BL

FIELD CHARACTERISTICS: A perennial grass with usually solitary erect stems growing to a height of about 1 m. The leaf blades are 3-8 mm. wide. The inflorescence is a diffuse panicle of drooping branches 1-3 dm. long. The ovate spikelets are 3-5(8) mm. long, have 3-8(10) flowers and become 3-5 mm. broad at maturity. The smooth lemmas are pointed and exceed the palea by about 0.5-1.0 mm. The nerves on the lemmas are conspicuous, but not raised significantly. Glume margins are entire.

See Giant Manna Grass (Glyceria grandis S. Watson) for good field characteristics that aid in distinguishing the manna grasses (Glyceria spp.) from other genera.

ECOLOGICAL NOTES: Rattlesnake manna grass is found in a variety of wet habitats, such as deep and shallow marshes, bogs, wooded swamps and lake shores. It is more commonly found north of the tension zone. Southward, it seems to prefer boggy habitats.

SOURCE: Fassett (1951); Gleason and Cronquist (1991); Swink and Wilhelm (1994); and Voss (1972).


Previous Section -- Giant Manna Grass (Glyceria grandis S. Watson)
Return to Contents
Next Section -- Lake Sedge (Carex lacustris Willd.)

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: http://www.npwrc.usgs.gov/resource/plants/mnplant/glca.htm
Page Contact Information: Webmaster
Page Last Modified: Saturday, 02-Feb-2013 06:31:42 EST
Sioux Falls, SD [sdww55]