The BBC recently broadcast "Attenborough's Ark" in which David Attenborough selects 10 endanged animals he'd put on his ark to resdue for future generations. He makes his selections based on the species' interestingness or uniqueness, and his selections include the black lion tamarin and Sumartan rhino, as well as less familar animals like the solenodon and the olm.
What a great way to get students to think about endangered plants. I'd have teams of students create their own ark lists of 10 threatened plants to preserve for posterity, with justification, followed by a vote for best ark, based on diversity, novelty, rarity, interestingness, etc.
The video is available in the BBC site (in the UK) for a couple more days , and it seems to be on youtube as well.
Via Mary Williams