Macadamia ternifolia (common names: small-fruited Queensland nut, gympie nut) is a tree in the flowering plant family Proteaceae, native to Queensland in Australia, and is listed as vulnerable under the EPBC Act.
Macadamia ternifolia is a small multi-stemmed tree which grows up to 8 m tall. The narrowly ovate adult leaves are in whorls of three on a stalk which is 4âÂÂ10 mm long. Each leaf is 9âÂÂ12.5 cm long, 2âÂÂ3.5 cm wide and is dull above and paler below. They are stiff, smooth and leathery, with slightly undulating margins and points at the tip. The midrib is prominent below, and slightly sunken above. Inflorescence is simple on a stem 5âÂÂ18 cm long, with pink tepals 6âÂÂ8.5 mm long, and filaments 4âÂÂ7 mm long which are joined to the tepals for 0.5âÂÂ6 mm and anthers 1âÂÂ2 mm long. The ovaries 0.4âÂÂ1 mm long and the style 5âÂÂ10 mm long, and give rise to fruit which is 14âÂÂ22 mm long and 13âÂÂ22 mm wide. The seeds are globose to broadly ovoid and about 16 mm long and 12 mm wide and have a smooth shell about 1 mm thick.