var. zeyheri is a dwarf succulent that forms groups of stems. The variety 'zeyheri' is a light-green form of Adromischus cristatus
which is distinguishable by its lack of aerial roots, and with glandular hairs on the leaves, inflorescences and flowers.
Similar species: Adromischus cristatus
var. mzimvubuensis looks quite similar at first glance but this plant has felted leaves covered with fine glandular hairs whereas Adromischus cristatus
var. zeyheri has completely smooth (glabrous) leaves.