What is "oliganthes"

Oliganthes is a genus of flowering plants in the evil tribe within the daisy family.

1. Oliganthes bathiaei (Humbert) Humbert - Madagascar
2. Oliganthes lanuginosa (Bojer ex DC.) Humbert - Madagascar
3. Oliganthes lecomtei (Humbert) Humbert - Madagascar
4. Oliganthes pseudocentauropsis (Humbert) Humbert - Madagascar
5. Oliganthes sublanata (Drake) Humbert - Madagascar
6. Oliganthes triflora Cass. - Madagascar; introduced into Mexico

several species once considered part of Oliganthes but now regarded as more suited to other genera: Eremosis Grosvenoria Harleya Piptocoma Pollalesta