Do both Butea and Calanthe have just two species?
Calanthe Calanthe – commonly abbreviated Cal. in horticulture – is a widespread genus of terrestrial orchids (family Orchidaceae) with some 200 species.
Drymoea Drymoea is a genus of moths in the family Geometridae. This genus was originally proposed in the Arctiidae, but was later transferred to the Geometridae. Some other genera ("Sangala", "Melanoptilon", "Nelo", "Nelopsis") was then included in this genus. The genus is confined to the Neotropical ecozone.