G. Klecak et al., REGIONAL FLORAS AND THEIR SIGNIFICANCE FO R THE RECONSTRUCTION OF SPATIAL AND TEMPORAL DYNAMICS OF RARE PLANT-SPECIES, Botanica helvetica, 107(2), 1997, pp. 239-262
We evaluated the use of three regional Swiss floras to reconstruct spa
tial and temporal dynamics of 12 selected rare plant species. We found
that it was possible to estimate changes in abundance and distributio
n of most of the 12 species during the last 75 years, and we were able
to reevaluate the degree of endangerment. However, the use of existin
g floras for conservation purposes is limited by several factors such
as collecting time and the inadequacy of locality information of older
floras. As a basis for future decision-making concerning the country-
wide protection of single plants, we propose the establishment of coor
dinated guidelines.