Macadamia tetraphylla

Macadamia tetraphylla.

In Family Proteaceae they are small to medium trees up to 18 m high.
Leaves are typically in whorls of 4 (occasionally 3 or 5).
Petioles may be absent or up to 4 mm long.

Leaves are narrowly elliptic, oblong, oblanceolate and up to 25 or 30 cm long by 6 cm wide.
The base is typically flattish and the tip pointed, sometimes with a mucro.
There are coarse teeth on the edges.
They are dull green above and paler underneath.
The long juvenile leaves are pink or red.

The drooping, unbranched, axillary inflorescences are up to 45 cm long.
The central axis is densely hairy.
The bracts at the base of the flowers are only around 1 mm long.
Flowers, on stalks up to 3 mm long, are pink to mauve.
The tepals, initially fused into a tube, are 10 to 15 mm long and hairy externally.

The anthers, in the dilated tepal tips, are on short filaments that are mostly fused to the tepals.
The anthers are around 2 mm long.
The ovary, up to 1.2 mm high, is on a short stalk.
The ovary, and the base of the 12 mm style, both have soft hairs.

The fruit are roundish, woody follicles 2 to 3.5 cm across.
They mature from green to brown and the surface is slightly rough.
They contain a seed up to 3 cm long.