Ricefield Manna Grass

Glyceria declinata

Poaceae Family (Grass)


Distinguishing Characteristics

  • Coarse, mostly prostrate, perennial grass. 


  • Vernal pools.

Additional Information

  • Introduced. Native to Europe*. Appears to be highly invasive in Central Valley vernal pools.
  • Flowering time: April - June.
  • *Not treated in Jepson Manual. Some confusion over whether the species invading the Central Valley is the weed G. declinata or the native G. occidentalis.
  • Additional images from CalPhotos.
  • Taxon not treated in the Jepson Manual. Genus treatment from Jepson Manual.



Copyright 2004-2009 Carol W. Witham. All rights reserved.