The control seeds of the aquatic species Myriophyllum spicatumand Nymphoides peltata as well as all the riparian species, on theother hand, exhibited discontinuous germination, i.e. almost allseeds germinated within a few days, resulting in high final ger-mination percentages (Fig. 1). For example, 91% of the seeds of M.spicatum and c. 80% of the seeds of Eupatorium cannabinum andScirpus sylvaticus and the fruits of Carex pseudocyperus germinatedwithin 3 days. Compared to these species, germination of the seedsof Angelica sylvestris, Impatiens glandulifera and the utricle-coatedfruits of C. pseudocyperus was relatively slow. I. glandulifera was anoutlier with a low final germination percentage.