Calycopeplus is a plant genus of the family Euphorbiaceae first described by Jules Émile Planchon as a genus in 1861.

[1][2] The entire genus is endemic to Australia.

[3][4] Its closest relative is Neoguillauminia from New Caledonia.

[7] The plants in this genus are monoecious, with the single sex flowers found in different parts of the same inflorescence.

The female flowers are solitary and in the centre, while the male flowers are found in 4 clusters of 3–16 flowers within the involucre opposite the lobes.