Heliamphora ionasi is a species of marsh pitcher plant thought to be endemic to the plateau that lies between the bases of Ilu Tepui and Tramen Tepui in Venezuela.

[2] It produces the largest pitchers in the genus, which can be up to 50 cm in height.

The species was discovered by a team led by Bassett Maguire and comprising, among others, Jonah Boyan.

The specific epithet ionasi is based on a Latinised form of Boyan's first name.

[2] A photograph by Maguire showing Boyan holding a specimen of H. ionasi was featured on the front cover of the September 1979 issue of the Carnivorous Plant Newsletter.