Abstract
SUMMARY: Wildings of the potato cultivar Redskin were shown by eye‐excision experiments and X‐ray treatment to be chimeras in which the outermost growing‐point layer, L1, was unchanged and in which the other layers of the stem apex, L2 and L3, had a mutation for the wilding character. It is probable that wildings of other cultivars which do not appear to be chimeras when investigated by eye‐excision experiments, have the constitution: L1 normal; L2 and L3 wilding.