Nature & Science
Field Guide to Noxious and Invasive Weeds
Including those Known to Occur or Are Potentially Occurring on the Apache-Sitegreaves National Forests
Compiled and Edited by
Mitchel R. White, Ph.D.
Ecologist
Apache-Sitgreaves National Forest
The Arizona Department of Agriculture is responsible for regulating noxious and invasive weeds within Arizona. Arizona law requires the department to maintain a noxious weed list that categorizes invasive plants based on their presence or absence in Arizona and on the ability of land managers to regulate a particular plant once it occurs in the state. Unfortunately, more new noxious and invasive weed species are found each year, and requests to add new species to the noxious weed list are increasing.
The noxious and invasive weeds listed in this document have been introduced to Arizona from other places without the accompaniment of their natural predators to keep them in check. As a result, these plants can overwhelm native plant species and spread dramatically year by year.
Download at Southwestern Region Field Guide to Noxious and Invasive Weeds
Please note that all of the images are under copyright.
Alerts & Warnings
- Lakeside Ranger District - Show Low Lake Nesting Area
- Lakeside Ranger District - Fool Hollow Lake Nesting Area
- Black Mesa Ranger District - Winter Motor Vehicle Closure Order
- Regional Closure Order - Fireworks, Explosives and Sparks
- 14-Day Stay Limit in 30-Day Period on Apache-Sitgreaves National Forests