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Phaseolus ‘Mitla Black’ is probably not a tepary bean (tepar, t'pawi, Phaseolus acutifolius).

Abstract and methods

In the horticultural trade, the Mitla Black cultivar of Phaseolus sp. is sometimes labelled as a Phaseolus acutifolius, and I suspect any drought tolerance it exhibits serves as confirmation bias to the grower. I performed a DuckDuckGo search which turned up some studies not directly related, the USDA GRIN database, as well as non-scientific literature. I have come to the low-confidence conclusion that Phaseolus ‘Mitla Black’ is correctly called Phaseolus vulgaris ‘Mitla Black’, and is probably not a hybrid between acutifolius and vulgaris.

This work is a publication under the Evdonian ministerial-equivalent portfolio of the Ministry of Theoretical and Practical Agriculture. I did not receive funding of any kind, and I do not have a wage with the ministry.

This work is under construction!

Works used