What happened to all those "Moon trees" whose seeds went into space?

Even if humanity never returns to the Moon, veterans of the lunar missions will still be around for hundreds, maybe even thousands of years. That's because the Apollo 14 astronaut Stuart Roosa brought hundreds of seeds with him to the Moon, and many of these were later planted to create the so-called Moon trees. The… » 2/11/11 1:00pm 2/11/11 1:00pm