ed stevens's picture


Observed: 23rd March 2010 By: ed stevensed stevens’s reputation in Plantsed stevens’s reputation in Plants

Bright yellow flower growing from basal rosette of leaves

Species interactions

No interactions present.

Species with which Primrose (Primula vulgaris) interacts


Jonathan's picture

THere are 2 kinds of flower

THere are 2 kinds of flower in primroses, found on different plants. This one is a 'thrum', with the anthers at the top of the flower tube. The other kind is called 'pin' and has the stigma at the top and the anthers lower down. Charles Darwin discivered this and wrote a whole book about the different forms of flowers on plants of the same species. Its a fascinating mating system, with populations containing 50:50 pin and thrum (usually), balanced by a genetic system rather like the one that balances the sex ratios of animals at 50:50.

University of Edinburgh and Biodiversity Observatory (OU)