As anyone who"s ever successfully nurtured a plant from seed knows, this is an achievement in itself. But this is no ordinary sycamore sapling. Its provenance can be traced back to a mission to the Moon in 1971, when astronaut Stuart Roosa carried 500 tree seeds in his Apollo 14 spacecraft. Trees grown from these seeds became known as "Moon Trees". Assuming the plant continues to flourish, O"Sullivan"s will be a rare third-generation Moon Tree.