Cranial flower

Cranial flowers were flowers that grew from skull seedlings. Horticultural educator Kaat Thrick-Thrick specialized in them.

Behind the scenes
Cranial flowers were mentioned in Monsters and Aliens from George Lucas, a book published in 1993. Lucasfilm employee Leland Chee, who maintains the Holocron continuity database, has indicated that information contained in the book is non-canonical.