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Aquatic and Wetland Vascular Plants of the Northern Great Plains

54. Juncaginaceae, the Arrow-grass Family

1. Triglochin L. -- Arrow-grass

1. Triglochin concinna Davy


Plants 1.5-4(6) dm tall, often less than 3 dm tall, tufted from a creeping rootstock. Leaves erect to curved-spreading, nearly terete, 1/3 to 3/4 the length of the plant, 0.5-1(1.5) mm wide; ligules deeply 2-lobed, the lobes rounded or acute, often overlapping, 1-2 mm long. Racemes loosely to rather densely flowered, (5)10-25 cm long; pedicels 1-5 mm long. Flowers ca. 2 mm across; tepals 1-2 mm long; carpels 6, stigmas 6. Fruits cylindric, 3-5 mm long, 1.5-2 mm thick, splitting into 6 oblong segments, the fruit axis terete. Jul--Aug. Wet, alkaline or saline meadows and flats; c and w ND, w SD, e MT and WY; (ND and SD to sw B.C., s to WY, CO, AZ and Baja CA; also s S.Amer.).

Plants of our region and other inland areas are designated var. debilis (M. E. Jones) J. T. Howell.

GIF- Distribution Map

Map key


Return to Family -- Juncaginaceae - The Arrow-grass Family
Next Section -- Triglochin maritima L.

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Menlo Park, CA [caww55]