2021 Ron Vanderhoff Chris Shuck chrishargreaves 2025 SD - SD Herbarium, San Diego Natural History Museum 2021 Ron Vanderhoff 2018 Zoya Akulova 2009 Neal Kramer 2009 Neal Kramer 2021 Ron Vanderhoff 2020 Ron Vanderhoff 2013 UCSC Weed Management Group
Grevillea robusta is a tree that is not native to California.
There is a high risk of this plant becoming invasive in California according to Cal-IPC.
[Wikipedia] Distribution, East coast Australia native: Grevillea robusta, commonly known as the southern silky oak, silk oak or silky oak, silver oak or Australian silver oak, is a flowering plant in the family Proteaceae. It is a tree, the largest species in its genus but is not closely related to the true oaks, Quercus. It is a native of eastern coastal Australia, growing in riverine, subtropical and dry rainforest environments.
Silky oak occurs naturally on the coast and ranges in southern Queensland and in New South Wales as far south as Coffs Harbour where it grows in subtropical rainforest, dry rainforest and wet forests. It is now relatively rare in its natural habitat but has been widely planted, including on Norfolk Island and Lord Howe Island. It has become naturalized in many places, including on the Atherton Tableland in Australia and in South Africa, New Zealand, Hawaii, French Polynesia, Jamaica and Florida. It is regarded as a weed in parts of New South Wales and Victoria, as "invasive" in Hawaii and as an "invader" in South Africa. (link added by Mary Ann Machi)
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2021 Ron Vanderhoff:!Chris Shuck:!chrishargreaves:!2025 SD - SD Herbarium, San Diego Natural History Museum:!2021 Ron Vanderhoff:!2018 Zoya Akulova:!2009 Neal Kramer:!2009 Neal Kramer:!2021 Ron Vanderhoff:!2020 Ron Vanderhoff:!2013 UCSC Weed Management Group:!
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Suggested Citation
Calflora:
Information on California plants for education, research and conservation,
with data contributed by
public and private institutions and individuals.
[web application]. 2025.The Calflora Database
[a non-profit organization].Available:
https://www.calflora.org/(Accessed: 07/15/2025).