Glyceria fluitans

Water manna grass

Family: Poaceae · Type: perennial · Not Native

Water manna grass is a naturalized perennial found in northern coastal California, northern coastal and interior California, and the California Ranges in wet places at elevations below 500 meters. Flowering from June to July, this plant produces pale green to green spikelets in narrow inflorescences 15 to 50 centimeters long. Growing with stems 20 to 150 centimeters tall that occasionally form floating mats, it has a robust, spreading habit. Its leaves have blades 10 to 25 centimeters long and 3 to 10 millimeters wide, with ligules 5 to 15 millimeters long. The narrow, cylindrical spikelets contain 6 to 16 florets, with lemmas 6 to 8 millimeters long and acute to acuminate tips.

Habitat: Uncommon. Wet places

Bloom period: Jun-Jul

Elevation: < 500 m

Bioregions: NCo, NCoRI, CaRH, expected elsewhere

Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Jepson eFlora, Cal-IPC, and more.