Lasjia whelanii

Lasjia whelanii, also known as Whelan's silky oak, Whelan's nut oak or Whelan's macadamia, is a species of large forest tree in the protea family that is endemic to north-eastern Queensland, Australia.

History
The tree was first described in 1889 by Queensland's colonial botanist Frederick Manson Bailey as a species of Helicia, which in 1901 he moved to Macadamia, but was transferred in 2008, in a paper in the American Journal of Botany by Peter Weston and Austin Mast, to the new genus Lasjia.

Description
The dark green leaves grow up to 21 cm long by 6 cm wide, with four or five leaves in each whorl. The white flowers grow as inflorescences. The globular fruits are about 5 cm in diameter, with the seeds strongly cyanogenetic (cyanide producing) and poisonous to humans. It produces a useful timber, suitable for construction work.

Distribution and habitat
The species occurs in the Wet Tropics of Queensland, in well-developed lowland tropical rainforest, from near sea level to an altitude of 650 m.