The Plant Patent Act of 1930 was designed to encourage the cultivation ofnewvarietiesofplants by prohibiting competitors from cultivating the offspring of those plants without permission.
Newvarietiesofplants (whatever techniques are used to craft them) that normally harbor relatively high levels of toxins such as celery, squash and potatoes are analyzed carefully to make sure that levels of potentially harmful substances are still in the safe range.
Tradescant the Elder, especially, devoted much of his life to bringing new species ofplants and trees to England, from all over the known world, and to cultivating newvarieties from existing species.