This Class A noxious weed was added to the State Noxious Weed List in 2003. It has a very limited distribution in Washington State. It was discovered in the North Bay area of Grays Harbor and it was found at Race Lagoon, near Penn Cove on Whidbey Island.

Unlike other Spartina species, S. densiflora does not have rhizomes. Spread is by seed or by vegetative growth.

For more information about dense-flowered cordgrass, please see the written findings of the WA State Noxious Weed Control Board or this to the WSDA spartina report.

If you find dense-flowered cordgrass in King County, please notify us through our online infestation form.

To find out where we have records of this weed in King County, use our interactive noxious weed map and search for dense-flowered cordgrass.

Dense-flowered cordgrass photos - click thumbnail for larger image