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

Glyceria elata (Nash ex Rydb.) M.E. Jones
tall mannagrass
Poaceae (Grass family)

Introduction to Vascular Plants
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Distribution of Glyceria elata
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Species Information

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Perennial grass from conspicuous rhizomes; stems erect to more or less decumbent, hollow, 100-150 cm tall/long.
Sheaths somewhat flattened, rough, the hairs directed backwards, closed to near the tops; blades 6-10 (12) mm wide, flat; ligules more or less cut-off at the ends, the margins usually irregularly jagged, strongly hairy, minutely rough, the lower leaf ligules 3-6 mm long.
Inflorescence a loose, open panicle, 15-25 cm long, the branches spreading; spikelets mostly 4- to 7-flowered, egg-shaped, about 5 mm long and 2 mm wide; glumes more or less fringed with fine hairs, the margins irregularly jagged, the lower ones (0.7) 1 (1.2) mm long, the upper ones about (1.1) 1.5 (1.8) mm long; lemmas prominently 7-nerved, slightly irregularly jagged, 2-2.5 mm long; palea tips with narrow slits, concealed by the lemmas; stamens 2; anthers 0.7-0.8 mm long.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Swamps, lakeshores, streamsides, bogs and moist to wet meadows and forests in the lowland and montane zones; common in SW BC, infrequent E of the Coast-Cascade Mountains N to 55 degrees N; E to SW AB and S to NM, AZ and CA.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Glyceria elata

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) 20 879 1650
Slope Gradient (%) 0 4 56
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
0 170 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
3 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: BWBS(2), CDF(5), CWH(40), ESSF(17), ICH(59), IDF(31), MH(1), MS(12), PP(1), SBPS(2), SBS(19)


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.

Taxonomic and Nomenclatural Links

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General References