Nieuwe vondsten van zeldzame planten in 1988, 1989 en 1990

The number of new records of rare fern species (among which three new Asplenium species) is remarkable, partly due to careful inventory work, but also because of spontaneous area expansion. Also Acer negundo and Stachys recta may show this phenomenon. It is uncertain whether Silene gallica must still be considered as extinct. Fortunately Wahlenbergia hederacea is part of the living flora again.