silk oak

or silky oak

noun

any of several Australian trees of the genus Grevillea, especially G. robusta, having feathery, fernlike leaves and showy orange or yellow flowers, grown as a street tree in Florida and California.

Origin of silk oak

First recorded in 1865–70

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018