Marimbas, you were pretty good about your info, but here's more-- Polyploids have 2 or more sets of genes. If I remember rightly (it's been 40 odd years since I was a Bio major), polys that have an even number of sets of genes are usually fertile, those with odd numbers or partial sets are "mules. Since cannabis is easily cloned, this shouldn't matter much. Our lovely roses are the result of not just selective breeding, but also of polyploidy. After comparing a wild rose and it's huge-flowered, domestic rose, it makes me wonder, what a poly pot would look (and smoke) like. The extra leaves at the nodes that you mentioned, could also be a simple mutation, not polyploidy. One word of warning, colchicine is very poisonous! Please be careful if you use it. DON'T spray it on a bud to change the seeds and then, after harvesting the seeds, smoke the left-over bud! Bad idea! If you try this method , mark the branch, and don't get "drift" on to the rest of the plant. You can just soak seeds in it and hope they will mutate. And because this is a poison, it will kill some of the seeds- how many survive depends on the level of colchicine. More colchicine means more mutations, but also a lower viability. Anyway, it sounds like an interesting experiment. Hmmm... Now where did I stash that old science supply catalog????