2.4. 3. Ptilochaeta Turcz., Bull. Soc. Imp. Naturalistes Moscou 16: 52. 1843.

Fig. 8 O

Type species.

Ptilochaeta bahiensis Turcz.

Notes.

Ptilochaeta comprises only three currently accepted species (no threatened species; Suppl. material 1) of trees endemic to the seasonally dry tropical forests of Argentina, Bolivia, Brazil, and Paraguay, South America (POWO 2024). After carefully analysing all type specimens of this genus, Ptilochaeta densiflora Nied. is proposed here as a new synonym of Ptilochaeta nudipes Griseb. An identification key for most species of Ptilochaeta can be found in Almeida et al. (2020) for Brazil.