Quackgrass form dense leafy stands usually in disturbed sites where ground water is available.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/35478170@N08">Matt Lavin</a> from Bozeman, Montana, USA
CC BY-SA 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/plant_diversity/3848755677/">Agropyron repens</a>