Lomanthus fosbergii, synonym Talamancalia fosbergii, is a species of flowering plant in the family Asteraceae endemic to Ecuador.

[2] Its natural habitat is subtropical or tropical moist montane forests.

[1] It was first described by José Cuatrecasas in 1953 as Senecio fosbergii.

[3] The genus Lomanthus is placed in the tribe Senecioneae.

This Senecioneae-related article is a stub.