During his professional career, Rudi Becking (1922-2009) amassed a large amount of phytosociological data (relevés). This material is now available from the Archives of the Humboldt State University, Arcata, CA:
http://www.ou.edu/cas/botany-micro/ben/ben447.html#4 Becking's papers include phytosociological data from Douglas fir forest types of over 300 plots in Washington State from the 1950s, classifications of redwood forests and sand dunes of northern California, and of Darlingtonia bogs and other serpentine environments extending into southern Oregon. For a short Rudi Beckings biography and bibliography see: http://www.ou.edu/cas/botany-micro/ben/ben421.html#4 Adolf Ceska, Victoria, British Columbia, Canada