An audio tour of the Botanic Garden, University of Oxford, told by its gardeners and author Philip Pullman.
21. Philip Pullman
The celebrated author shares his passion for the Botanic Garden and reads from the end of the His Dark Materials trilogy.
20. The gunnera
The plant growing on the island in the lower garden pond.
19. Green gardening
The new Merton borders - the latest Botanic Garden experiment.
18. The Madagascan palm
The palm that's not a palm!
17. Same or different?
A cactus and a euphorbia - an example of convergent evolution.
16. The fight for light
The rainforest and the desert in the middle of the city of Oxford.