silk oak - any of several Australian timber trees having usually fernlike foliage and mottled wood used in cabinetry and veneeringgenus Grevillea - large genus of Australian shrubs and trees having usually showy orange or red flowers grevillea - any shrub or tree of the genus Grevillea Grevillea robusta, silky oak - medium to tall fast-growing tree with orange flowers and feathery bipinnate leaves silky-hairy beneath; eastern Australia |