This species is part of section Isoplexis, which was temporarily accepted as an own genus.

In general, as of 2017, opinions concerning the taxonomic status of Isoplexis species differ depending on the source.

Individuals of these species are small, evergreen plants growing into rounded shrubs up to 150 cm tall.

The inflorescence is a cluster of orange-reddish flowers up to 3 cm in length, with short petals and noticeable upper and lower lip.

Bird pollination by the island populations of Phylloscopus species has been documented.