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.
Calothamnus chrysanthereus Calothamnus chrysanthereus , commonly known as claw flower is a plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is an erect shrub with needle-shaped leaves crowded on the ends of the branches and bright red flowers in spring. (In 2014 Craven, Edwards and Cowley proposed that the species be renamed "Melaleuca chrysantherea".)