I repeat my earlier 'operational' definition of a clone which I would put money on. "A clone (in the plant world) is conventionally regarded as a group of individuals derived from a single individual by vegetative propagation". Given that propagation is vegetative, it is assumed that, for the most part, these individuals will be genetically identical. While this assumption is reasonable, in practical terms genetic identity is not part of the concept. Can anyone cite an example of a putative clone being confirmed as such by genetic analysis? A further ground for assuming genetic identity is that, given the same conditions of cultivation, all these individuals tend to look alike and to be like the original individual. In cases where this is not the case, it is assumed that there has been somatic mutation.