|Dianthus superbus var.
rupifragus is a perennial inhabiting a dry, rocky area. It
closely resembles another variety, that is, D. superbus var.
longicalycinus. The former stems from setting flowers, not
erecting, extending sideways, with leaves having a powdery tinge,
and flowers are hairy inside, their petals a bit more deeply split.
Another difference is that it has two pairs of bracts; in contrast,
the latter has 3 or 4 couples. Iwao Maruyama considers this variety,
rupifragus, to be a survivor of an old type in a uniquely dry, rocky
area. Bloom time: May-June.