Blastcap

A Blastcap is a form of flora found on Tallon IV in Metroid Prime. They can be found in the Tallon Overworld, as well as in the Chozo Ruins. they look like large, algae-green mushrooms, and usually live in groups. If they are approached, they make a rustling sound and shake violently. If you make contact with one, it explodes and secretes a corrosive gas that causes damage. They can be dispatched with a few shots from an energy beam, as well as a collision, though the former is far less damaging to the attacking party.