Didymocheton pettigrewianus, commonly known as spur mahogany, spurwood, or Cairns satinwood, is a large tree in the family Meliaceae.

[4][7] The inflorescences are racemes or spikes to about 19 cm (7.5 in) long, produced on the twigs (or rarely in the leaf axils).

[4][5] Appearing in December and January, they carry numerous small fragrant flowers which are sessile and creamy white in colour.

[4][5][7] The species was first described as Dysoxylum pettigrewianum by the colonial botanist of Queensland Frederick Manson Bailey.

As a result large scale changes were made to the genus, and this species was given the new combination Didymocheton pettigrewianus.

[8] The species epithet was chosen by Bailey to honour the Brisbane businessman and politician William Pettigrew.

[4][9] It is found at altitudes from near sea level up to 1,000 m (3,300 ft), reaching its best development in the lowlands on basalt soils.

[11] The northern leaf-tailed gecko (Saltuarius cornutus) often hunts for prey in the scaly bark where it is well camouflaged.