Shrub or small tree to 5 m or more tall with thick warty bark. Leaves alternate, narrowly obovate to oblong to about 20 cm long and 1-2 cm wide, upper surface rusty-haired at first, lower surface hairy; margins toothed. Flower cone 5-20 cm long, about 8 cm wide. Perianth 3.5-4.5 cm long, pale yellow to greenish cream; Mar-June. Style curved. Fruits 3-4.5 cm long.
B. serrata is similar but has leaves 2-4 cm wide, flowers buff-cream with a distinct pollen presenter and smaller follicles to 3.5 cm long.
Source: (2002). Proteaceae. In: . Horticultural Flora of South-eastern Australia. Volume 3. Flowering plants. Dicotyledons. Part 2. The identification of garden and cultivated plants. University of New South Wales Press.