Pop Green

Pop Green (ポップ グリーン, Poppu Gurīn) is the seed of the hostile plants in the forest of "Greenstone" on Boin Archipelago. It can grow from seeds to full-sized plants in moments.

History
Heracles uses these seeds as bullets and weapons. According to Heracles, they have various uses. Heracles taught Usopp how they work.

Usage
Not much is known about the Pop Green's usage, but it can be used to summon plants. How it is triggered is currently unknown. Usopp fires them with his Kabuto slingshot and it summons a carnivorous plant to attack the target on impact.