Page author: Don Knoke
Beckmannia syzigachne
American slough grass

Distribution: Alaska to California, east from the coast to Manitoba and the Great Lakes region

Habitat: Pond margins, marshes and ditches at low elevations

Flowers: June - July

Origin: Native

Conservation Status: Not of concern


Robust annuals, scabrous but otherwise glabrous, the culms to 1 m. tall, hollow, erect, often stoloniferous.


Sheaths open; ligules 6-11 mm. long, acuminate, pubescent, usually lacerate; blades 5-10 mm. broad, flat.


Inflorescence narrow, congested, up to 3 dm. long, of racemose spikes; spikes 1-2 cm. long; spikelets 1-flowered, articulate below the glumes; glumes about 3 mm. long, subequal, strongly compressed and inflated, 3-nerved, semicircular, acute; lemmas equaling the glumes but much narrower; paleas slightly shorter than the lemmas, 2-nerved; stamens 3; lodicules 2, 1 mm. long.



Accepted Name:
Beckmannia syzigachne (Steud.) Fernald
Publication: Rhodora 30(350): 27. 1928.

Synonyms & Misapplications:
Beckmannia eruciformis (L.) Host
Beckmannia eruciformis (L.) Host ssp. baicalensis (V.A. Kusn.) Hultén
Beckmannia eruciformis (L.) Host var. uniflora Scribn. ex A. Gray
Beckmannia syzigachne (Steud.) Fernald ssp. baicalensis (V.A. Kusn.) Hultén
Beckmannia syzigachne (Steud.) Fernald var. uniflora (Scribn. ex A. Gray) B. Boivin
Additional Resources:

PNW Herbaria: Specimen records of Beckmannia syzigachne in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Beckmannia syzigachne checklist entry.

E-Flora BC: Beckmannia syzigachne atlas page.

CalPhotos: Beckmannia syzigachne photos.

USDA Plants: Beckmannia syzigachne information.

25 photographs:
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