Blastcap

The Blastcap is a mushroom-like plant found on Tallon IV. They can be found in the Tallon Overworld and Chozo Ruins areas. They resemble large, grey-green mushrooms, and live in groups.

The spores of the Blastcap can survive in outer space, and have propagated throughout the galaxy by means of traveling on interstellar solar winds. When approached, they will make a rustling noise and shake violently. On contact, they will explode, destroying them as well as diffusing a dangerous corrosive gas. However in the New Play Control! version of Metroid Prime, the gas is no longer hazardous. A few shots from the Power Beam or walking into them will suffice to destroy them.

Blastcaps are also encountered in Metroid Prime Hunters on both Alinos and Arcterra. The type that appears on Arcterra seems to be a white arctic species, though they appear to be merely scenery and can not be scanned.

Logbook Entry
"A large mushroom that explodes on contact, emitting noxious gas. Originating on TALLON IV, its spores can survive without atmosphere and have propagated throughout the galaxy on solar winds."