Page author: Don Knoke
Glyceria elata
tall mannagrass

Distribution: British Columbia south on both sides of the Cascades to California, east to Montana and New Mexico.

Habitat: Lake margins, stream banks, moist mountain meadows and other wet areas.

Flowers: May - July

Origin: Native

Conservation Status: Not of concern


Strongly rhizomatous perennials, the culms 1-1.5 m. tall.


Sheaths closed to near the top, slightly scabrous; ligules 3-6 mm. long, truncate, puberulent; blades flat, 6-10 mm. broad.


Inflorescence a loose, open panicle 15-25 cm. long, the branches spreading; spikelets 4- to 7-flowered, ovate in outline; glumes papery, 1-nerved, the first about 1 mm. long, the second, 1.5 mm. long; lemmas 2-2.3 mm. long, 7-nerved to the scarious upper margin, the nerves non-convergent; paleas about equal to the lemmas, minutely cleft at the tip; stamens 2.

Accepted Name:
Glyceria elata (Nash) M.E. Jones
Publication: Biol. Ser. Bull. State Univ. Montana 15: 17 1910.

Synonyms & Misapplications:
(none provided)
Additional Resources:

PNW Herbaria: Specimen records of Glyceria elata in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Glyceria elata checklist entry.

E-Flora BC: Glyceria elata atlas page.

CalPhotos: Glyceria elata photos.

USDA Plants: Glyceria elata information.

16 photographs:
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