*Cynodon dactylon

Family Poaceae

Couch Grass

Rhizomatous or stoloniferous mat-forming perennial grass to 30 cm high, rooting at the nodes. Longevity indefinite.

Flowers: December – March, wind-pollinated.

Fruit: Dry one-seeded, indehiscent fruit.


Gallery images: seed, seedling, rootstock, resprout


  • Weed of woodland and grasslands, reportedly naturalised near Sydney by 1804. Some forms in saltmarshes and around inland saltlakes are native.
  • Common weed in woodland and grassland at the Australian Botanic Garden.
  • Resprouts readily from rhizomes after fire, and
  • Periodic fire and grazing probably allow it to compete with taller growing tussock grasses.
  • C4 warm season metabolism.

Asterisk * indicates exotic species naturalised at the Australian Botanic Garden.

Ecology of Cumberland Plain Woodland

Cynodon dactylon plant

Cynodon dactylon flower