Question: Which is the only genus in family Symplocaceae, Acacia or Symplocos?

Context paragraphs:
Symplocos pyriflora: Symplocos pyriflora is a species of plant in the family Symplocaceae.  It is endemic to Peninsular Malaysia.

Symplocos nivea: Symplocos nivea is a species of plant in the family Symplocaceae.  It is a tree endemic to Peninsular Malaysia.  It is threatened by habitat loss.

Symplocos: Symplocos is a genus of flowering plants in the order Ericales.  It contains about 300 species distributed in Asia and the Americas.  Many species grow in humid tropical regions.  This is sometimes considered to be the only genus in family Symplocaceae.  Plants in this family are shrubs and trees with white or yellow flowers.

Symplocos truncata: Symplocos truncata is a species of plant in the Symplocaceae family.  It is endemic to Ecuador.  Its natural habitat is subtropical or tropical moist montane forests.

Symplocos calycodactylos: Symplocos calycodactylos is a species of plant in the family Symplocaceae.  It is endemic to Peninsular Malaysia.  It is threatened by habitat loss.

Symplocos versicolor: Symplocos versicolor is a species of plant in the Symplocaceae family.  It is endemic to Sri Lanka.

Symplocos verrucisurcula: Symplocos verrucisurcula is a species of plant in the Symplocaceae family.  It is endemic to Ecuador.  Its natural habitat is subtropical or tropical moist montane forests.

Symplocos trichoclada: Symplocos trichoclada is a species of plant in the Symplocaceae family.  It is endemic to Taiwan.

Acacia: Acacia, commonly known as the wattles or acacias, is a large genus of shrubs and trees in the subfamily Mimosoideae of the pea family Fabaceae.  Initially it comprised a group of plant species native to Africa and Australia, with the first species "A. nilotica" described by Linnaeus.  Controversy erupted in the early 2000s when it became evident that the genus as it stood was not monophyletic, and that several divergent lineages needed to be placed in separate genera.  It turned out that one lineage comprising over 900 species mainly native to Australia was not closely related to the mainly African lineage that contained "A. nilotica"—the first and type species.  This meant that the Australian lineage (by far the most prolific in number of species) would need to be renamed.  Botanist Les Pedley named this group Racosperma, which was inconsistently adopted.  Australian botanists proposed that this would be more disruptive than setting a different type species ("A. penninervis") and allowing this large number of species to remain "Acacia", resulting in the two African lineages being renamed "Vachellia" and "Senegalia", and the two New World lineages renamed "Acaciella" and "Mariosousa".  This was officially adopted, but many botanists from Africa and elsewhere disagreed that this was necessary.

Symplocos tubulifera: Symplocos tubulifera is a species of plant in the Symplocaceae family.  It is endemic to Jamaica.

Supporting paragraphs: Acacia Symplocos
Answer: Symplocos