The roots of the invasive plant Centaurea diffusa release 8-hydroxyquinoline, which has a negative effect on plants that have not co-evolved with it.
Centaurea | Centaurea nigra | Centaurea scabiosa | Centaurea jacea | Centaurea maculosa | Mined leaf of ''Centaurea nigra | Leaf of ''Centaurea scabiosa | Commelina diffusa | Chorizanthe diffusa | Centaurea montana | Centaurea iberica | Centaurea diffusa | Centaurea cineraria | Buddleja diffusa | Boerhavia diffusa | A shoot of ''Centaurea nigra |