The genus name of
Johnstonella is in honour of
Ivan Murray Johnston (1898–1960), an American botanist. It was first described and published by
August Brand in Repert. Spec. Nov. Regni Veg. Vol.21 on page 249 in 1925. Although various species were sometimes still called synonyms of
Cryptantha. In 2012, the
phylogenetic relationship of members of the genus
Cryptantha was carried out, based on
dna sequencing analyses, it was then proposed that the resurrection of the following genera
Eremocarya,
Greeneocharis,
Johnstonella, and also
Oreocarya. ==Known species==