Australian silky oak

Grevillea robusta
Australian silky oak: Grevillea robusta Australian silky oak: Grevillea robusta

Common name:

Australian silky oak

Scientific name:

Grevillea robusta (Proteaceae)

Alternative common names:

Silver oak; he-oka (English); Australiese silwereik

A large, evergreen tree 18-30m high with a straight trunk and moderately spreading crown. Leaves are dark green above and greyish-white or rusty-silk beneath and have a fern-like profile. Golden-orange flowers in terminal, bottle-brush-like sprays from September to November. Brownish-black, leathery fruits contain up to two winged seeds

Additional Info

  • Where does this species come from?

    Australia

    What is its invasive status in South Africa?

    CARA 2002 – Category 1 NEMBA – Category 3

    Where in South Africa is it a problem?

    Western Cape, Eastern Cape, KwaZulu-Natal, Gauteng, Limpopo and Mpumalanga

    How does it spread?

    Spread by seed dispersal

    Why is it a problem?

    It competes with and has the potential to replace indigenous species

    What does it look like?

    General description: A large evergreen tree growing 18-30m in height with fern-like leaves. Leaves: Leaves are fern-like and dark green above and greyish-white or rusty-silk beneath. Flowers: Golden-orange flowers in terminal, bottle-brush-like sprays from September to November. Fruit/seeds: Brownish-black, leathery fruits containing up to two flat-winged seeds

    Does the plant have any uses?

    Ornament, shade, timber and shelter