The reproductive organs (receptacles) became
mature from late spring to early summer. Sexual identification is possible
only when the receptacles are very mature. The receptacles of both sexes
became more yellow as maturity progresses, but it is the male receptacles
that became golden yellow to orange in colour. This means that the plant
pictured above is probably a male. Soon after that the receptacles have
withered and died during the summer, new ones grow.
A fifteen-spined stickleback is also visible in
the picture above.
Knotted wracks life cycle resembles bladder