Oregon Flora Project // The Oregon Flora Project seeks to present scientifically sound information about the vascular plants of Oregon that grow without cultivation in formats that are useful to generalists as well as to scientists. There are four basic components to the Oregon Flora Project: the Atlas, the Checklist, the Flora, and the Photo Gallery.

PLANTS Database // The PLANTS Database of the US Department of Agriculture. Includes checklists and distributions on native and introduced species in the United States, including Alaska and Hawai'i.