denseflower cordgrass
Spartina densiflora Brongn.


Spartina densiflora is perennial aquatic grass. It grows 1-5 ft. (0.3-1.5 m) tall and is native to South America.
Leaf (blade) margins in-rolled, 1/8 to 1/3 inches wide at the base. Blade at a 15-35 degree angle to the stem. Internodes firm.
The inflorescence narrow, dense, and cylindrical with branches erect and overlapping.
Seeds are 0.25-0.4 in. (0.6-1 cm) long and smooth. S. densiflora reproduces by seed and rarely rhizomes.
Ecological Threat
S. densiflora is a nonnative grass species that invades the middle tidal zones in estuaries where it aggressively out competes native grasses, sedges and salicornia stands.

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EDDMapS Distribution

EDDMapS Distribution - This map is incomplete and is based only on current site and county level reports made by experts, herbaria, and literature. For more information, visit

State Regulated List

State Regulated List - This map identifies those states that list this species on their regulated list. For more information, visit

Taxonomic Rank

Kingdom: Plantae
Phylum: Magnoliophyta
Class: Liliopsida
Subclass: Commelinidae
Order: Cyperales
Family: Poaceae
Genus: Spartina
Subject: Spartina densiflora Brongn.


Plants - Grass or Grasslike