Patch 3.3.2? (2010-02-02): The mission Botanist Taerix (2) is no longer offered, though Volatile Mutations still is. Volatile Mutations no longer has a prerequisite. (May have changed prior to 3.3.2, but confirmed on Feb 6 2010.)
<name>, Botanist Taerix is in need of your assistance. You'll find her with her apprentices to the west, outside the ship.
Oh, thank goodness you've come. We have much to do.