Simplify the following text for a Grade 8 native English-speaking person.
Original: The northern islands have 300 â `` 350 plant species which tend to be woody , whereas the southern islands have 200 which tend to be herbaceous ; the Whitsunday region is the most diverse , supporting 1,141 species .
Simplified: The southern islands have 200 plants which are herbaceous . The Whitsunday region has the most ( 1,141 ) plant speciess .