USGS - science for a changing world

Northern Prairie Wildlife Research Center

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

Aquatic and Wetland Vascular Plants of the Northern Great Plains

Triglochin L. -- Arrow-grass


Perennial, grasslike herbs, tufted from a creeping rootstock. Leaves all basal, slender, terete or somewhat flattened, sheathing at the base, ligulate. Inflorescence a terminal, ebracteate, spikelike raceme; pedicels short and decurrent on the scape axis. Flowers perfect, regular; tepals 6, in 2 series, deciduous; stamens 6, anthers sessile, nearly as large as the tepals; carpels 3 or 6, each with an apical stigma, ovary superior, eventually splitting into 3 or 6, 1-seeded segments. Plants of wet, often alkaline or saline habitats.

Reference:

Howell, J. T.  1947.  Remarks on Triglochin concinna.  Leafl. W.        
     Bot. 5:13-19.

Lead Characteristic Go To
1 Carpels and stigmas 3; fruits linear-clavate, the fruit axis 3-winged. T. palustris
1 Carpels and stigmas 6; fruits short-cylindric, the fruit axis terete. Lead 2
2 Ligules entire, acute or rounded; leaf blades somewhat flattened, mostly 1.5-3(4) mm wide; plants usually 3 dm or more tall. T. maritima
2 Ligules deeply 2-lobed; leaf blades nearly terete, mostly 0.5-1(1.5) mm wide; plants often less than 3 dm tall. T. concinna


54. Juncaginaceae, the Arrow-grass Family
1. Triglochin L. -- Arrow-grass
1. Triglochin concinna Davy
2. Triglochin maritima L.
3. Triglochin palustris L.


Return to Family -- Juncaginaceae - The Arrow-grass Family
Return to Contents

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/vascplnt/gentrigl.htm
Page Contact Information: Webmaster
Page Last Modified: Saturday, 02-Feb-2013 06:39:08 EST
Sioux Falls, SD [sdww54]