2.6. Hiraeeae A. Juss., Ann. Sci. Nat., Bot., sér. 2, 13: 255. 1840, as “ Hireae ”, emend. nov. R. F. Almeida.

Type genus.

Hiraea Jacq.

Diagnosis.

Lianas; leaf blades with apex glandular; thyrses, many-flowered; pollen 4–12 - pantocolporate (porate in Psychopterys); styles with apex uncinate, stigma lateral; mericarps winged, 2 lateral wings more developed than the dorsal, usually butterfly-shaped, presence of piperidines, absence of benzofurans, benzopyrans, dithiols, furanoid lignans, hydroxy acids and derivatives, naphthopyrans, pteridines and derivatives, pyrimidine nucleosides.

Notes.

Hiraeeae currently comprises five accepted genera, Adelphia, Excentradenia, Hiraea, Lophopterys and Psychopterys, and 105 species (54 threatened species; Suppl. material 1) of lianas or shrubs endemic to the Americas (POWO 2024).