Underbrush refers to the dense growth of low-lying plants, small trees, or shrubs that grow underneath larger trees or in forests. It can also be called undergrowth. Full definition
Clark has spent years all over the South crawling through underbrush and kicking up leaf litter to collect ticks that transmit infections. (discovermagazine.com)
He works to remove a lot of underbrush of misunderstanding and moralizing of the text, seeking to listen to it on its own terms. (religion-online.org)
Your Miniature Schnauzer is a wire haired dog, the hallmark of a dog that would normally work in underbrush, or other abrasive environments that would require this type of protection. (second-opinion-doc.com)