Data on 1958 plant species from Denmark. Historical data (1857 to 1883) and present data (2012) from the same regions. Data contains two data-files, one with presence-absence data from 14 Danish regions and one with regional abundance data from 10 Danish regions (for calculations and precausions relating to abundance, please see App. 2 of publication). The presence absence data file also includes data on whether species are native or exotic to Denmark
