Northern Prairie Wildlife Research Center
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.
Howell, J. T. 1947. Remarks on Triglochin concinna. Leafl. W.
||Carpels and stigmas 3; fruits linear-clavate, the
fruit axis 3-winged.
||Carpels and stigmas 6; fruits short-cylindric, the
fruit axis terete.
||Ligules entire, acute or rounded; leaf blades somewhat
flattened, mostly 1.5-3(4) mm wide; plants usually 3 dm or more tall.
||Ligules deeply 2-lobed; leaf blades nearly terete,
mostly 0.5-1(1.5) mm wide; plants often less than 3 dm tall.
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
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