Are Cleyera and Calymmanthium the names of genus'?
Cleyera Cleyera is a plant genus consisting of 18 species of tender, evergreen shrubs to small trees, mostly native to Mexico and Central America, and one from Eastern Asia. In the APG III system it is placed in the family Pentaphylacaceae.
Scleropyrum Scleropyrum is a genus of trees in family Santalaceae first described as a genus in 1838. At present (September 2014), only one species is recognized, although several others are listed as "unresolved," meaning that further research is needed to determine affinities.