Swaystack

"As a creature moves by, the top of them, like little Frisbees, shoots off and wedges into the side of the creature, into their leg, into their carapace, into their hair, stuck for the moment. As they move on, they reach a new area, and drop off, and they begin growing all over again."

- David Aguilar explains how the Swaystacks propagate their species.

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

Biology
Despite looking like plants, Swaystacks 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 the Swaystacks releases their offspring onto the Lollygar, which carries it off to drop into another area where the offspring grow into another Swaystack.

Trivia

 * It is very likely that the bulb on top of them is the head.

Appearances

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