The inflorescences are "thryses" – compound structures in which the flowers are arranged on secondary branches.

[2] Equilabium and Plectranthus species are distinguished from Coleus by having the stem (pedicel) of the calyx attached symmetrically to the base of the calyx tube, rather than opposite the upper lip, and having the corolla lobes more or less equal in length.

Equilabium species can be distinguished from Plectranthus by the truncated shape of the throat of the calyx and by the usually S-shaped tube of the corolla, which is parallel-sided at the base.

Only the names of the genus and the type species, Equilabium laxiflorum, were formally published at the time.

[2] In 2019, Paton et al. published a summary cladogram for the subtribe Plectranthinae,[2] based on an earlier 2018 study.

[2] In the version below, the three genera accepted in these studies that were formerly included in a broad circumscription of Plectranthus are highlighted.