It seems like you might be referring to Silver Oak (scientific name: Grevillea robusta). Silver Oak, also known as Silky Oak or Southern Silky Oak, is a fast-growing evergreen tree native to eastern coastal Australia. It is widely planted as an ornamental tree and for timber in many tropical and subtropical regions around the world. The name "Silver Oak" comes from the silvery appearance of its leaves and its oak-like wood, although it is not a true oak.

Key Features of Silver Oak (Grevillea robusta

1. Appearance:
   • Height: Silver Oak can grow up to 20-30 meters tall in cultivation, and even taller in its natural habitat, sometimes reaching heights of 40 meters.
   • Leaves: The leaves are pinnate, fern-like, and deeply lobed, with a silvery-gray underside that gives the tree its common name. The leaves can be up to 30 cm long and have a unique, feathery appearance.