Brachychiton megaphyllus, commonly known as the red-flowering kurrajong, is a tree of the genus Brachychiton found in northern Australia.
It was described in 1988 by Gordon Guymer in his revision of the genus, previously having been considered a variant of Brachychiton paradoxus.
Hybrids with Brachychiton multicaulis have been reported.
B. megaphyllus grows as a large shrub or small tree, ranging from 2–8 metres (6 ft 7 in–26 ft 3 in) tall, with a trunk that can be 10 to 25 centimetres (3.9 to 9.8 in) wide at breast height. The dark brown bark has vertical furrows and shallow tessellations. Like those of all members of the genus, the leaves are alternately arranged along the stems. The large leaves are roughly oval or three-lobed in shape, measuring 15–26 centimetres (5.9–10.2 in) long by 13–24 centimetres (5.1–9.4 in) wide. The leaf base is cordate (heart-shaped). The plant is deciduous, bare of leaves from June to September. The orange-red flowers appear from June to October or sometimes November. The yellow-brown woody follicles, or seedpods, mature from September to June. Measuring 6.5–11 centimetres (2.6–4.3 in) long and 3–4.8 centimetres (1.2–1.9 in) wide, they split along their length to reveal 25–45 seeds. The seeds, which are ovoid with a smooth surface, and 8–9 millimetres (0.31–0.35 in) long by 6–7 millimetres (0.24–0.28 in) wide, are covered by a hairy coating known as the exotesta.
The species is found in the Northern Territory, north of latitude 17 S. It is a component of open eucalypt woodland, commonly found with Eucalyptus miniata and E. tetrodonta. It generally grows on red soils derived from laterite.
According to the speakers of the Ngan’gityemerri language, the flowering of B. megaphyllus marks the time the freshwater crocodiles are laying eggs.
Commonly cultivated in the Northern Territory, it was listed as the official emblem of the city of Darwin in 1988.