An enigmatic fossil moss from the British Tertiary

Abstract

Patterns of variation in isozymes of peroxidase, esterase and acid phosphatase from six populations of Sphagnum pulchrnm in Britain are described. These are used to compare levels of polymorphism within and between the populations. Both are high and the implications of these fmdings are discussed in relation to the origin and maintenance of variation in populations where sexual reproduction does not take place.