Stone pines (a non-invasive alien tree) still remain in the area around Rhodes Memorial.

For an hour or more, they plodded past these neatly turned rows of alien trees.

He looked around at the bare floor, the vine-striped walls, and the alien trees.

The alien tree was adopted as from March 3rd, 1967 to the Spice Island.

The alien trees make strange musical sounds.

Most forest cover in the developed world is planted with stands of alien trees turning them into deserts for biodiversity.

Considerable efforts have been made to control the rapid spread of these invasive alien trees.

Unfortunately, the Wood is being invaded by alien trees and shrubs that could overwhelm our native plants if they are not controlled.

He leaned with his back against the rough bark of an alien tree, listening to the sounds of the jungle around him.

Kirk pushed away from the alien tree and began moving carefully through the darkness.