Apple Mortar

Apple Mortar is a plant in Plants vs. Zombies 2. It is a premium plant that costs 250 sun to plant. It attacks by lobbing apple cores in 3 lanes that damage and temporarily stun zombies they hit.

Almanac entry:

Apple Mortar lobs apple cores that damage and briefly stun zombies over three lanes.

Apple Mortar Stuns three zombies dead in their tracks. SPAF! That'll show 'em! That'll show ALL of them!

Origins
Its name is most likely a reference to the 2-inch Medium Trench Mortar, also known as the "Toffee Apple" due to its shape when loaded with a bomb.

Trivia

 * It is the first apple in Plants vs. Zombies 2.
 * This and Apple (an unused plant in the original game and Plants vs. Zombies: All Stars) are the only plants that are based on apples.
 * Apple Mortar bears a striking resemblance to A.K.E.E.. Coincidentally, most of Apple Mortar's sounds are recycled from A.K.E.E.'s.