E-Flora BC: Electronic Atlas of the Flora of British Columbia

Beckmannia syzigachne (Steud.) Fernald
American sloughgrass
Poaceae (Grass family)

Introduction to Vascular Plants
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Distribution of Beckmannia syzigachne
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Species Information

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Annual grass often with stolons; stems erect, hollow, up to 100 cm tall.
Sheaths open; blades mostly 5-10 mm wide, flat; ligules 6-11 mm long, pointed, entire or commonly with jagged margins, usually folded back in growth, hairy.
Inflorescence of numerous, short, appressed to ascending, narrow, congested, racemose to paniculate spikes, up to 30 cm long, the spikes 1-2 cm long; spikelets 1-flowered, articulating below the glumes, unstalked, borne closely aggregated in 2 rows on one side of the rachis; glumes strongly compressed and inflated, semi-circular, 3-nerved, abruptly pointed, about 3 mm long; lemmas lanceolate, much narrower than the glumes, lightly 5-nerved, somewhat long-pointed, slightly larger than the 2-nerved paleas, 1.8-3.5 mm long; rachillas not prolonged; anthers 1-1.4 mm long; lodicules almost 1 mm long.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Shores, marshes, wet meadows and ditches in the steppe and montane zones; frequent throughout BC east of the Coast-Cascade Mountains; N to AK, YT and NT, E to PQ and S to ME, MA, PA, OH, IL, MO, KS, NM, AZ and CA.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Beckmannia syzigachne

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class




Elevation (metres) 410 871 1250
Slope Gradient (%) 0 0 15
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
90 160 230
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
5 6 8
Modal Nutrient Regime
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in: BG(3), BWBS(5), IDF(12), SBPS(1), SBS(2)


The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Synonyms and Alternate Names

Beckmannia erucaeformis
Beckmannia erucaeformis var. uniflora
Beckmannia eruciformis auct. non (L.) Host
Beckmannia eruciformis subsp. baicalensis (Kusnez.) HultTn
Beckmannia eruciformis var. uniflora Scribn. ex Gray
Beckmannia syzigachne subsp. baicalensis (Kusnez.) Koyama & Kawano
Beckmannia syzigachne var. uniflora (Scribn. ex Gray) Boivin

Taxonomic and Nomenclatural Links

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General References