[2] It was described in 1988 by Gordon Guymer in his revision of the genus, previously having been considered a variant of Brachychiton paradoxus.

The yellow-brown woody follicles, or seedpods, mature from September to June.

[3] According to the speakers of the Ngan’gityemerri language, the flowering of B. megaphyllus marks the time the freshwater crocodiles are laying eggs.

[4] Commonly cultivated in the Northern Territory, it was listed as the official emblem of the city of Darwin in 1988.

[5] The rootstock of young plants can be eaten raw, while fibre from the bark is used to make both rope and string.