The University of Arizona cooperative extension publishes a field guide to common invasive plants in Arizona. The guide gives one-page descriptions with full page photographs of each plant. You can print the guide, or contact your local Arizona NRCS office for a copy. Printable guide: http://cals.arizona.edu/pubs/natresources/az1482.pdf
The Arizona invasive species advisory council website can also help landowners identify and mitigate the threat of invasives, on land and in the water. Read more at: http://az.gov/invasivespecies/
The Arizona invasive species public map is an interactive map where citizen scientists can report invasives and gather information about their current locations. You can select your area of the state to search for what's there, or search for the name of the plant you're interested in to see where it is. http://imapinvasives.org/azimi/map/
What other resources do you use to identify and report invasive plants on your land?