purpleinopp said:Sweet potatoes & morning glories are in the same genus, Ipomoea. Many species of Ipomoea make morning-blooming flowers, but the nickname MG is usually only used for the ones with the bigger blooms. But don't let that stop you if you want to call your plants MGs. Saying MG does not automatically determine a specific species, and there are many cultivars of some of the species.
Sweet potato, as far as I've seen, is reserved for I. batatas & cultivars of that.
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