Grazielanthus is a monotypic genus of flowering plants belonging to the family Monimiaceae.

[1] The only species is Grazielanthus arkeocarpus.

[2] It is native to south-eastern Brazil.

[2] The genus name of Grazielanthus is in honour of Graziela Maciel Barroso (1912–2003), a Brazilian botanist.

[3] The Latin specific epithet of arkeocarpus refers to arkeo meaning the ark-like structure and "carpus" = fruit or carpel, which comes from the protection of the fruitlets by the hypanthium (tube or cup-like structure in a flower that includes the bases of sepals, petals, and stamens.