disseminule

— For ectozoic dispersal the disseminule is commonly adhesive by means of a sticky surface or, more often, by its possession of hooks or other devices by which it catches on to the fur etc. Anyone who has tried to extract the fruits of Burdocks (Arctium spp.) or Beggar-ticks (Bides spp.) from woolly garments will be aware of the effectiveness of such adhesion. Some examples of disseminules modified for dispersal by animals are shown in Fig. 27.