Sessile

[Sarah]

Resting directly upon the main stem or branch, without apetiole or footstalk; as, a sessile leaf or blossom.

[Sarah]

doesn't fucking move

[Luis Fok]

used to refer to a leaf or flower that has no stem of its own but is attached directly to the main stem of the plant, or to refer to a plant or tree that has such leaves or flowers:

[Britney]

(of an organism, e.g. a barnacle) fixed in one place; immobile.