Glyceria grandis Calflora

Calflora, a 501c3 non-profit

Taxon Report

Glyceria grandis S. Watson

American mannagrass

2004 Dean Wm. Taylor

Ed Morris

Matt Lavin

2004 Dean Wm. Taylor

Glyceria grandis is a perennial grasslike herb (rhizomatous) that is native to California, and also found elsewhere in North America and beyond.

California Rare Plant Rank: 2B.3 (rare, threatened, or endangered in CA; common elsewhere).


	Plant Range Observation Search ~38 records in California Plant Characteristics one or more occurrences within a 7.5-minute quadrangle

Bloom Period

Photos on Calflora


Genus:	Glyceria
Family:	Poaceae
Category:	angiosperm
PLANTS group:	Monocot
Jepson eFlora section: monocot

Wetlands: Occurs in wetlands

Habitat: riparian, streambanks, lake-margins, meadows, bogs/fens, edges

Communities: Freshwater Wetlands, wetland-riparian

Name Status:
Accepted by JEF + CNPS + PLANTS + POWO

Alternate Names:


JEF	Glyceria grandis var. grandis

Information about Glyceria grandis from other sources


Nursery availability from CNPLX This plant is available commercially. Jepson eFlora USDA PLANTS Profile (GLGR) Photos on Calflora Photos on CalPhotos Google Images Photos on iNaturalist ID Tips on PlantID.net	ITIS Original Publication citation International Plants Names Index Search efloras.org (Flora of North America) Landscape information from Calscape BONAP Distribution Map CNPS Inventory: 2B.3 Consortium of California Herbaria 2 Search the Native American Ethnobotany Database	Add an Observation Location Suitability Planting Guide Distribution by County
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Suggested Citation

Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals. [web application]. 2025. The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/ (Accessed: 05/18/2025).