1.1. 1. Acmanthera (A. Juss.) Griseb. in Martius, Fl. Bras. 12 (1): 28. 1858.

Figs 4 H, 8 E, K, 10 R

≡ Pterandra sect. Acmanthera A. Juss., Ann. Sci. Nat. Bot., ser. 2, 13: 328. 1840.

Type species.

Acmanthera latifolia (A. Juss.) Griseb.

Notes.

Acmanthera currently comprises seven accepted species (four threatened species; Suppl. material 1) of trees, shrubs or subshrubs endemic to flooded forests of the Amazon rainforest, South America, and just a single species occurring within the Cerrado biome (Almeida et al. 2020; POWO 2024). For an identification key for all species of Acmanthera, see Anderson (1980) or Almeida et al. (2020).