Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page Larrea tridentata:

This text has been unreferenced on Wikipedia for a very long time. If you can't find a source, be bold and remove it!

"

Creosote bush stands tend to display an evenly spaced distribution of plants.[3] Originally,[citation needed] it was assumed that the plant produced a water-soluble inhibitor that prevented the growth of other bushes near mature, healthy bushes. Now, however, it has been shown[citation needed] that the root systems of mature creosote plants are simply so efficient at absorbing water that fallen seeds nearby cannot accumulate enough water to germinate, effectively creating dead zones around every plant.[4]