Uthanian scatterbud

An Uthanian scatterbud was, according to the Fourth Doctor, a "very rare", "beautiful red flower" which grew only on Uthe 3. It was, he said, a former symbol of peace on the planet. He once bade K9 Mark II to find such a flower on the surface of the planet. With it, he was able to prove to that world's battle computer that the war it was conducting should end.

Since the computer had asserted that the Rad-Plague had destroyed all life on the planet's surface, the existence of any life successfully disputed the computer's logic. The flower K9 found thus caused the computer to shut down, the two-century war to finally end, and the inhabitants of Uthe 3 to be able to leave their underground bunkers. (PROSE: Sweet Flower of Uthe)

Behind the scenes
At different points in the story, scatterbud is capitalised and not capitalised.