President Tyler was first marketed as a larger-sized (!) dark purple-blue Ipomoea purpurea, so unless you have a particularly large-sized purpurea that has an appreciably larger flower diameter than than the more common-sized I. purpureas, you do not have President Tyler.

I doubt there is any historical connection with the person of President Tyler (as that is just another marketing ploy), but I did see photos from growers who had bought the Ipomoea purpurea President Tyler when it was first offered by the big seed companies and it did have a larger-diameter flower.

The same larger-sized Ipomoea purpurea flowers will come out of the antique mixes if you grow them out for enough generations, and if you do get larger-sized blooms, please tag them to isolate and preserve these larger-sized purpureas.

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