There's a secret group of weird organisms that make life possible -- and you've probably never noticed them.

In the second episode of Bush Botany, we meet up with Warwick Schofield to investigate cryptogams, a group of plant-like organisms with some strange properties and an important role to play. (Plus something weird that happened during World War II.)

This video was made with the assistance of Warwick Schofield, with acknowledgements to Margaret Schofield, Kay Wotherspoon and Susan Keckes.