Answers are grounded in this paper and cite their sources.
A descriptive key is provided for eight species of nightshade, Solanum spp., occurring in Canada. The biology for three of four closely related taxa, eastern black nightshade, Solanum ptycanthum Dun. ex DC; black nightshade, S. nigrum L.; and hairy nightshade, S. sarrachoides Sendt., weedy in various parts of the country, is discussed. American nightshade, S. americanum Mill., a name once applied to S. ptycanthum, is actually very rare in Canada and its biology is only partially discussed in this paper.
No takes yet. Share an insight, caveat, or question.
Bassett et al. (1985) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: