Decaisnina hollrungii is a species of flowering plant, an epiphytic hemiparasitic plant of the family Loranthaceae native to the New Guinea, Queensland, Australia,[3] and in the Bismarck Archipelago and the Solomon Islands.

[4] In Queensland, D. hollrungii is found in rainforest and in dense coastal scrub on a wide range of hosts.

[5][6] In 1894, Philippe Édouard Léon Van Tieghem assigned it to his new genus, Amylotheca.

[7][8] In 1966, Bryan Alwyn Barlow reassigned it to the genus, Decaisnina.

[1][2] The generic name, Decaisnina honours the French botanist Joseph Decaisne (1807–1882), and the specific epithet, hollrungii, honours the botanist Udo Max Hollrung (1858-1937).