The small petal is predominantly whitish (perhaps the palest of purples?) but the outer edges are outlined in blue (giving the appearance of a blue-edge). There is also a heavy blue line running down its middle.
I downloaded a list of Commelina from the USDA NRCS and I will try to work my way through it.
Lynn, I agree. I think it is beautiful, too. I was surprised to see that so many states consider it a weed but I am going to take my little weed and adore it anyway
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Tara, thank you for the Commelina id and thank you's to everyone for your help. ATP is amazing. We have asked nurseries off and on for 50 years and it took an ATP member all of 5 minutes to come up with the answer. That kind of says it all