[2][1] It is an afromontane species, restricted to the mountains of northeastern Africa.

[3][4] A subspecies, Hedbergia longiflora subsp.

[1] The phylogeny of the genera of Rhinantheae has been explored using molecular characters.

These three taxa share evolutionary affinities with genera Tozzia, Bellardia, Neobartsia, Parentucellia, and Odontites.

Melampyrum Rhynchocorys Lathraea Rhinanthus Bartsia sensu stricto (Bartsia alpina) Euphrasia Hedbergia   (including Bartsia decurva + B. longiflora) Tozzia Odontites sensu lato   (including Bartsiella   and Bornmuellerantha) Bellardia Neobartsia (New World Bartsia) Parentucellia