Bamboo & the giant panda's distribution

1. Bamboo - an unusual plant

This is book 3 in Giant Panda Expert Visit P4-P7. It is advised you start at book 1 and read in order. There are 4 books in this series. 

Look at these two photos. Photo A shows a bamboo forest. Photo B shows a mixed forest. We usually use the word forest to describe a large area covered in trees...

...BUT is bamboo a tree?