Buckinghamia celsissima, commonly known as the ivory curl, belongs to family Proteaceae. They are native in the wet tropical rainforests in the north eastern Queensland, Australia. They also grow well in subtropical places. It is planted widely as a street tree in Sydney suburbs and many other places.

Buckinghamia celsissima produces inflorescences of curled ivory coloured flowers from late summer through into autumn. The flowers are full of nectar which attracts birds and bees alike.

The flower does not have separate petals or sepals but both structures fused together and form 4 perianths. Anthers are attached onto the end of the perianths. The pistil is made up of stigma, style and ovary. The stigma receives pollen grains. The ovary houses 4 ovules inside. After fertilization, the ovules develop into seeds and the ovary grows and develops into a fruit. The fruit is woody, 1.5–2 cm long.

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