Hatiora herminiae is a species of flowering plant in the tribe Rhipsalideae, family Cactaceae.

The stems are circular in cross-section, not ribbed, and are composed of segments 2–5 cm (0.8–2.0 in) long and 5 mm (0.2 in) in diameter.

[5][6] Hatiora herminiae is endemic to Southeast Brazil, where it is found in the states of Minas Gerais and São Paulo.

[2][1] It grows as an epiphyte, particularly on Araucaria, in cloud forests in the Serra da Mantiqueira at elevations of around 1,500–2,000 m (4,900–6,600 ft).

[1][3] When assessed in 2010, it was considered to be endangered, the main threat being collection for its attractive flowers, but it was also threatened by declines in habitat.