are Cladanthus and Oxydendrum both plant genus ?
Cladanthus Cladanthus is a genus of plants in the family sunflower family, native to the Mediterranean region.
Orectanthe Orectanthe is a genus of flowering plants, in the family Xyridaceae, first described as a genus in 1958. It is native to the tepui of northern South America (Venezuela, Guyana, and northwestern Brazil). It is closely related to "Abolboda", and both known species were originally classified as members of "Abolboda" before being transferred to "Orectanthe".