Fumes

A Fume is a purple cloud of spores produced by Fume-shrooms and Gloom-shrooms to fight Zombies. Fumes do one Pea of damage, but hit everything within their range, making them AoE. Gloom-shrooms fire four times faster than the Fume-shroom. The Fume-shroom has a range of four spaces, where the Gloom-shroom has a range of the eight spaces surrounding the one on which it is planted. The fumes are renowned for their ability to pass through the shields (including screen doors, newspapers, ladders, and trash cans (much like lobbed-shot plants)). Unlike lobbed-shot plants, however, fumes also damage the shields, making them slightly more effective given the same damage per second if there are non-fume and non-lobbed-shot plants as well.

Trivia

 * The Fume-shroom and Gloom-shroom's Fumes look like multiple Spores.
 * Fumes, following to the dictionary, are toxic vapors, explaining why they go through shields. This does not explain their decapitating and shield-damaging effects, however.
 * It is odd that even though Fume-shrooms hit zombies in their torso, the headwear of various zombies can still block it.
 * Fumes are the only non-lobbed shot weapons that ignore the roof's angle.
 * The Fume-shroom attacks all zombies in its range, damaging all zombies that are touched by the spores.
 * Fumes are the only AOE projectiles that do equal damage to all zombies in range.