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Sphalmium

Sphalmium is a monotypic genus of flowering plants in the protea family. The only species, Sphalmium racemosum, is a large forest tree. Common names include Satin Silky Oak, Mystery Oak, Mt Lewis Oak, Poorman's Fishtail Oak, Satin Silky Oak and Buff Silky Oak.

The tree grows to or more. It is endemic to the upland rainforests of the wet tropics region of north-eastern Queensland, Australia.