| any of several Australian trees of the genus Grevillea, esp. G. robusta, having feathery, fernlike leaves and showy orange or yellow flowers, grown as a street tree in Florida and California. |
| silk oak n. An Australian evergreen tree (Grevillea robusta) having divided fernlike leaves and showy one-sided clusters of orange flowers. |
silk oak
(Grevillea robusta), large tree native to Australia and also grown as a street tree in warm areas and, in its juvenile stage, as an indoor pot plant. It belongs to the family Proteaceae (see Proteales).
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