ɪt wʌz fɚɹə lˈɔŋ tˈaɪm kənsˈɪdɚd ɐ fˈɔːɹm ʌv ˈeɪtʃ. hˈɛɾɚɹˌoʊdɑːksə, bˌʌt hɐz ɹˈiːsəntli bˌɪn ɹˈeɪzd tə spˈiːsiːz ɹˈæŋk.
It was for a long time considered a form of H. heterodoxa, but has recently been raised to species rank.