Swaystack

Swaystacks are 30 ft (~ 9.1 meters) tall stalky animals native to the temperate world of GPC9-25.

Biology
Despite looking like plants, they are actually animals with root-like tentacles that skitter in movement and root into the ground to stay in place, as they sway in the wind to blend in with the scenery, until something like the Lollygars come by, to which it releases their offspring onto the Lollygar, and carry it off to drop into another area where they grow into another Swaystack.

Appearances

 * The Universe, s03e05, "Alien Faces" (2008)