Grevillea robusta

Grevillea robusta_Zoya Akulova
Photo: Zoya Akulova

Common names: silkoak

Grevillea robusta (silkoak) is a tree (family Proteaceae) with yellow-orange to brown flowers and finely dissected leaves found in the central and south coast ranges of California. It is native to eastern Australia. It favors grasslands and riparian and bottomland habitat. It spreads via seeds and root suckers. Its winged seeds are dispersed by wind.

Cal-IPC Rating: Watch

CDFA Rating: None?


Plant Risk Assessment - An evaluation of the potential for a plant to be invasive in California.

Weed Management Notes

No Weed RIC Management Notes are available for this species. Check for information on other species in the genus on the Weed RIC site.

Cal-IPC Newsletter Articles

There are no newsletter articles associated with this species yet.

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.

There are no Symposium presentations associated with this species yet.

Other Grevillea robusta 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

    Grevillea robusta_leaf_copyright 2009_NealKramer
    Grevillea robusta (silkoak) leaf. Photo: &#169 2009 Neal Kramer
    Grevillea robusta_seed pods (empty)_copyright 2009_NealKramer
    Grevillea robusta (silkoak) seed pods (empty). Photo: &#169 2009 Neal Kramer