- Red List of Plants of the Lake Baikal Region
 - Provides a list of the area's rare and endangered plants. - New Mexico Rare Plants
- Features a rare plant list, county distribution information, pictures, and upcoming conference details.
- Toni Corelli's Botany Page
- Includes San Francisco Bay Area rare and endangered plant species lists.
- Way-Too-Long List of Rare, Endangered and Threatened Vascular Flora of North Carolina
- Contains all of the vascular plants that are listed as endangered or threatened in North Carolina.
- Endangered Plants of the Florida Scrub
- Photographs and profiles of some endangered or threatened plant species that are endemic to Florida scrub.
- California's Threatened and Endangered Plants
- Information from the California Department of Fish and Game's Habitat Conservation Planning Branch.
- Center for Plant Conservation's National Collection of Endangered Plants
- Contains plant material for more than 600 of the United State's most imperiled native plants.
- Great Lakes Ecological Assessment: Threatened and Endangered Plants
- Outlines the status of several local species and provides distribution maps.
- Rare & Endangered Plants of Oregon
- Offers a brief profile of the four endemic species federally listed as of January 1, 1995.
- Select Rare and Endangered Plants of Missouri
- Provides information on 24 rare and endangered plants found in or historically known from Missouri.
- Protecting Iowa's Rare and Endangered Plants
(PDF) - Discusses the proper use of herbicides and how improper use can damage sensitive native plant populations.
- Protocols and Models for Inventory, Monitoring, and Management of Threatened and Endangered Plants
- Technical report from research done by the Colorado State University Department of Rangeland Ecosystem Science.
- IUCN Red List of Threatened Species
- Includes a video presentation, photo gallery, statistics, and resources related to the IUCN Red List of Threatened Species. Donation link provided.
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