Semecarpus magnificus is a species of unbranched, or scantily branched pachycaulous rainforest tree in the Cashew family Anacardiaceae.

[1][2] According to the original describer Karl Schumann, Semecarpus magnificus is a tree growing to 4–6 m tall.

They are crowded together at the ends of the branches, as in Clavija, Theophrasta and other similar genera.

They are grouped in inflorescences 60–80 cm long, that are composed of distant branches laden with flower clusters.

[3] Semecarpus magnificus was first described by Karl Schumann in 1889,[2] based on a collection by Max Hollrung[3] made during a research expedition to New Guinea from 1886 to 1888.