Flindersia oppositifolia, commonly known as mountain silkwood,[2] is a species of tree that is endemic to the Bellenden Ker Range in northern Queensland.

[3][4] Mountain silkwood was first formally described in 1892 by Ferdinand von Mueller who gave it the name Hypsophila oppositifolia and published the description in The Victorian Naturalist from material collected on Mount Bartle Frere.

[5][6] In 1982, Thomas Hartley and Laurence Jessup changed the name to Flindersia oppositifolia in the journal Brunonia.

[7] Mountain silkwood grows in rainforest at altitudes of 1,300 to 1,500 m (4,300 to 4,900 ft) and is only known from the Bellenden Ker Range in north Queensland.

[3][4] Flindersia oppositifolia is classified as of "least concern" under the Queensland Government Nature Conservation Act 1992.