Agrostis avenacea

Agrostis avenacea_ Pacific bentgrass_ JM Di Tomaso
Photo: Joseph DiTomaso

Synonyms: Agrostis retrofracta

Common names: Pacific bentgrass

Agrostis avenacea (Pacific bentgrass) is a perennial grass (family Pocaceae) commonly found throughout northern California and San Diego County. This weed easily outcompetes native vegetation. Pacific bentgrass inhabits open, disturbed, often moist places to 300 m elevation. It is especially invasive in vernal pool habitat in the San Diego area.

Cal-IPC Rating: Limited?

CDFA Rating: None?


Plant Assessment Form - Information gathered by Cal-IPC on the impacts, rate of spread, and distribution of invasive plants in California. Does not include management information.

Weed Management Notes

  • Management Notes - Information on management techniques and effectiveness from the University of California Cooperative Extension’s Weed Research & Information Center.

Cal-IPC Newsletter Articles

Cal-IPC Symposium Presentations

Presentations are linked where available. Where a presentation is not available, find more information by reading the abstract in the Cal-IPC Symposia Archive.

Other Agrostis avenacea Information

  • CalPhotos - Images of plants taken mostly in California.
  • Calflora - Distribution map and records of this species in California.
  • CalWeedMapper - Distribution map of this species in California with ability to determine regional priorities.
  • EDDMapS - Distribution of this species in North America.
  • Jepson Interchange - Information on this plant's taxonomy, biology, and distribution from UC Berkeley's Jepson Herbarium.
  • USDA PLANTS Database - Information on identification and distribution, with links to websites in individual states.
  • Additional photos

    Agrostis avenacea_leaf blade and sheath_Zoya Akulova
    Agrostis avenacea (Pacific bentgrass) leaf blade and sheath. Photo: Zoya Akulova
    Agrostis avenacea_infestation_Zoya Akulova
    Agrostis avenacea (Pacific bentgrass) infestation. Photo: Zoya Akulova