Vermont Agency of Natural Resources offers details to purple loosestrife, water chestnut and other invasive aquatic plants.

Advocacy group on environmentally sound weed research shares conference announcements, a newsletter and membership details.

Organization dedicated to the conservation of public and private lands from noxious weeds offers a weed directory and events calendar.

Locate a list of Florida's most invasive plants, an exotic plant management plant, and invasive plant control guides.

Read a report that details 86 of the 4,600 invasive plants that have been introduced to Hawaii. Includes profiles of many nonnative plants..

Source for weed distribution maps of Idaho, plant identification guides, and weed identification software.

Guide to invasive weeds, insects and plant diseases hosted by Montana State University includes profiles of crop and range weeds.

Source for an events calendar, grant reports, and Idaho reports on invasive plant management.

Read a profile of the damage done by invasive plants and discover photos of the top ten invasive plants of Indiana.

Vegetation management newsletter features a weed district map, profiles of 30 invasive weeds, and profiles of methods of weed control.

Report written by Clifford Smith details pest plants of Hawaiian native ecosystems. Includes illustrated plant profiles.

Examine integrated pest management strategies to control invasive plants including crab grass, poison oak, and yellow starthistle.

Find distribution maps of invasive species, monitoring databases, and weed lists. Includes a list of non-invasive plants for landscaping use.

Volunteer based organization in the Santa Cruz Mountains of California works to removed non-native plants from degraded wild lands.

Find a list of declared weeds, an events calendar and texts of weed laws.

Weed information source from the University of Wyoming includes weed identification photographs and course information.