The form comes true to seed. The specimen received by ACRA was grown in a garden and was approximately 6 years old. Small tree growing to 6 metres in height with a spread of 5 metres. Flower inflorescences terminal spikes 26 cm long by 13 cm wide on short branches off main trunk. Perianth tubular in bud, splitting into segments where the style protrudes.
Anthers sessile in the concave tips of the perianth segments.
Fruit a follicle, opening in two hard woody obtuse valves set transversely on the rachis. Seeds 2 with a terminal membranous wing, the seeds separated by a plate. Peak flowering is from January to March. New South Wales'. The inflorescence is similar to B. serrata except for the size of the brushes.