Description Grevillea 'Ivanhoe' is a dense shrub growing to about 3 m tall and 4 m wide. The leaves are toothed along the edges and grow to about 10 cm long and 2 cm wide. The red flowers are produced in toothbrush-shaped clusters for long periods. The cultivar is presumed to be a hybrid between Grevillea longifolia and Grevillea caleyi. It is believed to have originated in a garden in the suburb of Ivanhoe in Melbourne, Victoria. It was accepted for registration with Australian Cultivar Registration Authority (ACRA) in October 1992.