The Ptilochaeta clade is not yet fully treated. For a recent evaluation, see Cardona-Cruz et al. 2022. Syst. Bot. 46: 361–369.

Illustrations are available for the following genera:

Dinemagonum (photos, drawing) - Chile

Dinemandra (photos, drawing) - Chile

Lasiocarpus (drawing) - Mexico

Ptilochaeta (photos, drawing) - Argentina, Brazil, Paraguay