Glyceria declinata (waxy mannagrass)

Glyceria declinata

Photo courtesy Joseph DiTomaso

Glyceria declinata (waxy mannagrass) is a perennial grass (family Poaceae). Waxy mannagrass is found in the Central Valley, from Shasta County south to Fresno County. It has invaded deep vernal pools, swales, ditches, and stock ponds. Some reports indicate that it is rapidly spreading in Central Valley vernal pools.

Cal-IPC Inventory rating: Moderate

Cal-IPC Resources on Glyceria declinata

• California Invasive Plant Inventory Assessment Form (pdf) - Information gathered by Cal-IPC on the impacts, rate of spread, and distribution of invasive plants in California. Does not include management information.
• Cal-IPC News - Articles from our quarterly newsletter. Each issue is available as a pdf. (None for this species.)
• Cal-IPC Symposium Proceedings - Presentations and papers from our annual Symposium. (None for this species.)

Cal-IPC News Articles

• None for this species.

Cal- IPC Symposium Proceedings

• None for this species.

Other Resources on Glyceria declinata

• USDA PLANTS database - Federal database with information on identification and distribution, and links to websites in individual states.
• Jepson Online Interchange for California Flora - Information on taxonomy, biology, and distribution from the UC Berkeley Jepson Herbarium.
• CalFlora - Distribution information by county based on submitted observations and herbarium specimens.
• The Nature Conservancy Management Summary - Information compiled by TNC land managers. Photos included for some species.


[ top of page ]
Printer-friendly version