Tangle Weed

From Wikitroid, the Metroid wiki

Tangle Weed is a plant species found in Metroid Prime. It entangles creatures that pass through it, slowing down larger creatures (such as Samus), or stopping smaller ones entirely.

Shooting at or near it will make it retract into the ground.

There is a poisonous varient known as Venom Weed. They are also on Phaaze in Metroid Prime 3: Corruption

Phazon Creatures
Native to Phaaze	Leviathan • Jelsac • Liquid Phazon • Phazon Grub • Phazon Leech
Corrupted Creatures	Phazon Hopper • Phazon Nightbarb • Phazon Shriekbat • Phazon Puffer • Phazon Pillbug • Tangle Weed
Space Pirates	Aurora Unit 313 • Elite Pirate • Phazon Elite • Omega Pirate • Berserker Knight • Berserker Lord
Phazon Metroids	Tallon Metroid • Hunter Metroid • Fission Metroid • Phazon Metroid • Hopping Metroid • Metroid Hatcher
Leviathan Core Guardians	Metroid Prime • Emperor Ing • Mogenar • Helios • Omega Ridley
Born of Phazon	Phaazoid • Red Phaazoid • Ing • Dark Samus