Simplify the following text for a Grade 12 native English-speaking person.
Original: Acacia ( or ) is a genus of shrubs and trees belonging to the subfamily Mimosoideae of the family Fabaceae , first described in Africa by the Swedish botanist Carl Linnaeus in 1773 .
Simplified: Acacia is a genus of shrub or tree are belonging to the subfamily Mimosoideae of the family Fabaceae , first described in Africa by the Swedish botanist Carl Linnaeus in 1773 .