Generally speaking peas which when seen in bulk are monomorphic in colour and shape, will give fairly true and uniform offspring (but such strict monomorphism is rather exceptional). Instances to the contrary occur, and in my own brief experience I have seen some. In a row of _Fill-basket_ grown from selected seed there were two plants of different habit, seed-shape, etc. Each bore pods with seeds few though large and round. Again _Blue Peter_ (blue and round) and _Laxton’s Alpha_ (blue and wrinkled), grown in my garden and left to nature uncovered, have each given a considerable proportion of seeds with _yellow_ cotyledons, about 20% in the case of _Laxton’s Alpha_. The distribution of these on the plants I cannot state. The plants bearing them in each case sprang from green-cotyledoned seeds taken from samples containing presumably unselected green seeds only. A part of this exceptional result may be due to crossing, but heterogeneity of conditions[68] especially in or after ripening is a more likely cause, hypotheses I hope to investigate next season. Hitherto I had supposed the crossing, if any, to be done by _Bruchus_ or Thrips, but Tschermak also suspects _Megachile_, the leaf-cutter bee, which abounds in my garden. [68] Cotyledon-colour is not nearly so sensitive to ordinary changes in conditions as coat-colour, provided the coat be uninjured. But even in monomorphic _green_ varieties, a seed which for any cause has burst on ripening, has the exposed parts of its cotyledons _yellow_. The same may be the case in seeds of green varieties injured by _Bruchus_ or birds. These facts make one hesitate before denying the effects of conditions on the cotyledon-colour even of uninjured seeds, and the variation described above may have been simply weathering. The seeds were gathered very late and many were burst in _Laxton’s Alpha_. I do not yet know they are alive.