Harmsiopanax is a genus of woody, monocarpic flowering plants of a palmlike habit belonging to the family Araliaceae.

[1] It comprises 3 species, of which the most important is the gigantic Harmsiopanax ingens.

The genus name of Harmsiopanax is in honour of Hermann Harms (1870–1942), a German taxonomist and botanist.

[2] It was first described and published in H.G.A.Engler & K.A.E.Prantl, Nat.

[1] The genus is native to Java, the Lesser Sunda Islands, New Guinea and Sulawesi.