[maps] Warning! The maps are automatically generated from the textual information, and the process does not always produce acceptable result; See about maps for more info.
Some related literature:
[FPN]; Hitchcock & Cronquist, 1998
Flora of the Pacific Northwest (11th edn)
Fl. Pacif. NW
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Keep in mind that the taxonomic information is copied from various sources, and may include many inaccuracies. Expert help is welcome.