Ipomoea alba. Total bust. One seedling came up kinda deformed, and the others didn't come up at all. When I dug into the mix to examine the seeds, they were sludgy, oozing messes.
So I bought new seeds from a different vendor (Swallowtail Garden Seeds, over there in the links). These look totally different from the first batch.
Those were puffy and fuzzy. I called them a cross between Corn Nuts and Kellogg's Corn Puffs. These are more like enlarged popcorn. Hard, smooth, shiny. And for the same price, I got 50 seeds instead of 10.
The sowing instructions say to soak the seeds for 24 hours or nick the pointy tips with a sharp knife. I'm running both experiments.