Vegetation

Plant are a, but unlike most other kinds of vegetation, they don't are as just decoration but more as hazards and obstacles Green Pikmin are the only that can deal with them.

Tentacles of the Ground
They are vines that come out of the ground or trees, they move towards Pikmins, if those get one they'll pull them to underground or the unknown, wgich counts as a death. Green Pikmin is the only Pikmin it doesn't target, and it doesn't get near it on a area like some sort of shield for other non-Green Pikmins.

Snap Herb
It is stationary in place, once a Pikmin gets inside it, it'll close, which after many seconds kill them Pikmin, indicated by the soul that ascends then. Green Pikmin can destroy them.

Thorn Stalk
They are a beanstalk-like bean stem with thorns. It can be in two ways. One from the seeds deployed by some enemies, then after many seconds making it come out of the ground killing any Pikmin by impaling, íf a Green Pikmin is under the place the seed was been deployed, then nothing will happen which means it'll not come out of the ground. And on another as some sort of wall which needs to be attacked by Green Pikmins.