"'Pretty colorful flowers! What color? Brown and grey of course!"
Fossilbloom is a common resource exclusive to the Moss Blanket, obtained with a drill.
These fossilized flowers were once an abundant food source for prehistoric slimes. Nowadays they're just decorative or used as fertilizer. Fossilbloom is the last common ancestor of most flowers on the ranch.
On the Ranch
Deposit Fossilbloom into the Lab's refinery where it can be used for crafting Slime Science gadgets.