A series of six children's books in a series called Plant Top Tens have been published by Raintree Publishers. I was consultant on the series, but my input was so great I am also credited as co-author with Angela Royston. They are aimed at children around 8 years old.
I'm really pleased with the books, which each cover one of the six continents (except Antarctica obviously):-
I chose the 10 plants to feature in each book, and wrote the brief on what was special about each plant. The titles on Africa and Europe even use some of my photographs. For more details or to buy visit their website here.