The Mushroom

Caterpillar: By the way, I have a few more helpful hints. One side will make you grow taller...
Alice : One side of what?
Caterpillar : ...and the other side will make you grow shorter.
Alice : The other side of what?
Caterpillar : THE MUSHROOM, OF COURSE! 

 Alice in Wonderland

Lewis Carroll

 Amanita muscaria Manchester, NJ