Montana's Noxious Weeds 2012
The 2010 update of 'Montana's Noxious Weeds' updates contact information for Weed Districts in each county. It also eliminates Common Crupina as a noxious weed. Three new weeds were added in the update: Curlyleaf Pondweed, Hydrilla, and Cheatgrass. The updated book also describes a new classification system for noxious weeds which classifies weeds into five priorities rather than the 4 categories used previously.