Mushroom

Mushroom is a type of plant.

Obtaining
Mushrooms can be instantly mined with anything.

Natural generation
Mushrooms naturally generate in poorly lit areas, as well as mushroom island biomes and the Nether.

Witch huts have a flower pot with a mushroom inside.

Huge mushrooms
Mining a mushroom block has a chance to drop up to 2 mushrooms.

Mobs
Shearing a mooshroom drops 5 red mushrooms.

Usage
Mushrooms can be planted and grown on blocks in light levels below 13 and not directly underneath the sky, except on mycelium or podzol. Mushrooms grow at the same rate regardless of light level and type.

Besides being mined directly, mushrooms are dropped as items if:
 * the block below them falls, is moved, or removed;
 * a fluid flows over them;
 * it is above level 12 and a block updates next to it.

Huge mushrooms
When bone mealed, mushrooms have a chance to grow into a huge mushroom.

Spread
Randomly, mushrooms will spread onto nearby blocks when in appropriate conditions. They will spread only if there are fewer than 5 mushrooms of the same type in 9×9×3 area.

Trivia

 * Red mushrooms bear a strong resemblance to Amanita muscaria mushrooms, more commonly known as fly agarics. Consuming them will cause delirium and hallucinogenic effects if their psychoactive properties have not been reduced by parboiling. Similarly, red mushrooms in Minecraft caused damage to the player in the Survival Test.