1.2. 3. Diacidia Griseb. in Martius, Fl. Bras. 12 (1): 119. 1858.

= Sipapoa Maguire, Mem. New York Bot. Gard. 8: 124. 1953. ≡ Diacidia subg. Sipapoa (Maguire) W. R. Anderson, Mem. New York Bot. Gard. 32: 63. 1981. Type species: Sipapoa kunhardtii Maguire [≡ Diacidia kunhardtii (Maguire) W. R. Anderson].

Type species.

Diacidia galphimioides Griseb.

Notes.

Diacidia currently comprises 11 accepted species (seven threatened species; Suppl. material 1) of trees, shrubs or subshrubs endemic to campos rupestres and tepuis within the Amazon rainforest biome of South America (Almeida et al. 2020; POWO 2024). For an identification key for all species of Diacidia, see Anderson (1981) for the Guyana Highland and Almeida et al. (2020) for Brazil.