I thought so, too, but the leaf doesn't match up to any examples of Ipomoea that I can find. Here's a pic of the leaf.
I'm curious about this myself. I took some pictures of unidentified Ipomoea myself today, but the leaves were a more standard heart shape. Otherwise, except for indistinct differences in the Anthers (probably just pollen), the flower looks identical.
Looks to me like saltcedar has it. It would even validate the differences in the ovary region I spoke of as more than just blurry pollen.
