Are Duvalia and Sprekelia both types of plants?
Duvalia Duvalia is a succulent plant genus in the tribe Stapeliae, milkweed subfamily Asclepiadoideae, in the family Apocynaceae (dogbane).
Crantzia Crantzia is a plant genus in the Gesneriaceae family. "Crantzia" species grow in damp or wet forests, mostly on Caribbean islands. Some are epiphytes, others are subshrubs or herbaceous plants with fibrous roots.