There are three subspecies; all three are considered rare. The typicalvariety is known only from a locality near Constanza, Valle del Jaque; var. ekmanii is recorded from Mornela Selle and Morne laVisite, although the latter subpopulation is now thought to be extinct; and var. urbaniana appears to have been reduced to inaccessible areas although viable populations were recorded in 1984 in Pic la Selle.