Hibiscus diriffan is endemic
to the island of Soqotra. The Soqotran Archipelago is a group of
islands in the Arabian Sea belonging to Yemen. Hibiscus diriffan is
distributed on the southern limestone plateaus of the island, from
Diksam to Wadi Irih and extending onto the granitic slopes of the
Haggeher mountains. It can be found growing at altitudes of
20–1,300m and is common in several vegetation types. According to a
2004 IUCN asessment, this is a species of "least comcern", and
considered to be under no present or perceived threat.
Hibiscus diriffan has bright yellow flowers and small gray-green
leaves. It is similar to another Soqotran endemic, Hibiscus
quattanensis but differs in the densely stellate-hairy not
glabrescent pedicels, epicalyx and calyx. The leaves are also
narrower with a distinctly cordate base and crenate margins, and
have a tendency to become lobed.