Write about different types of plants?
What plants? Biological categories?
https://www.google.com/search?client=safari&rls=en&q=plant+classification+chart&ie=UTF-8&oe=UTF-8&gfe_rd=ssl&ei=4y5DV43PBOSD8QfJ8YbYBg
https://www.google.com/search?client=safari&rls=en&q=plant+classification+chart&ie=UTF-8&oe=UTF-8&gfe_rd=ssl&ei=4y5DV43PBOSD8QfJ8YbYBg