2.4. Ptilochaeteae R. F. Almeida trib. nov.

Type genus.

Ptilochaeta Turcz.

Diagnosis.

Treelets to shrubs; thyrses reduced, 4 - flowered; pollen 8 - zonocolporate, styles apex geniculate to truncate; mericarp winged or setose, presence of 2 - aryl-benzofuran flavonoids, dibenzyl-butane lignans, isoflavonoids, oxacyclic compounds, oxanes, pyrrolidines, thiocarbonyl compounds, absence of organothiophosphorus compounds, thiophenes.

Notes.

Ptilochaeteae currently comprises three accepted genera, Dinemandra, Lasiocarpus, and Ptilochaeta, and ten currently accepted species (one threatened species; Suppl. material 1) of small trees or shrubs endemic to the Americas (POWO 2024).