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Oregon State University: Landscape Plants

The site features images and information on over 900 landscape plants (mostly woody) listed in alphabetical order by genus. Use the Plant Search to filter by attributes such as flower color or leaf shape to narrow down the possibilities.

King County, Northwest Yard and Garden

A collections of resources for sustainable yard and garden care. Find information on rain barrels, making compost, Northwest native plants and listen to episodes of the Yard Talk podcast.

A community for gardeners with a forum for discussion and asking questions and an extensive database of plants with photos. Registered members can create blogs and list what plants they have to share or want to acquire. You can also listen to regular podcasts from site owners and avid gardeners Dave and Trish. This site will get you through the winter and let you share your gardening passion with like minded folk. is published by the National Gardening Association.

Washington State Noxious Weed Control Board

The Washington State Noxious Weed Control Board (the Board) advises the Washington State Department of Agriculture (WSDA) about noxious weed control in Washington State. This site includes a weed list, weed identification and weed laws for WA.

Plants of Washington Identification Key

Help for identifying plants, trees and lichens of Washington. This simple random access key can help you identify an unknown plant by narrowing the number of species that could possibly match your plant.

Discover Life: Plantae

Resources for identifying plants, angiosperms, gymnosperms, flowers, fruits, seeds and leaves.

Weed Identification

Enter information about an unidentified weed, and compare it with photographs and text descriptions of weeds that share similar characteristics.

Learning to Identify Plants by Families

An article that introduces you to the basic patterns of identification for seven of the largest and easiest-to-recognize families of plants, which are found worldwide.

Weed Images and Descriptions

The Rutgers Cooperative Extension provides close-up photos and descriptions of many weeds found in New Jersey, but are also common throughout the U.S.