I've now got a water lily to go with the lily pad.
The pattern is Jane Eborall's Lotus Flower. For the petals, I used DMC Cordonnet in white, with pink vintage beads; for the leaves, the same green Lizbeth as I used for the lily pad (684 Leaf Green Medium) with darker green beads; and for the stamens, Lizbeth 170 Pineapple Parfait. I also added some beads to the rings that form the base of the stamens, even though the pattern doesn't call for them.
So Jane calls this a lotus and I'm calling it a water lily. They are, in fact, two entirely different plants which happen to look somewhat alike due to convergent evolution. A few seconds on Google led me to this this handy site to tell the difference between the two. However, since the flowers do look so similar, and tatting conveys only an impression of the flower, I believe this could pass for either. In the finished piece, I'm going to place it sitting directly on the water, which according to the website makes it a lily. Also, I'm planning to make another in purple; lilies come in purple but lotuses don't. So there.
Squijum doesn't care what you call the flower, so long as you show him sufficient admiration.
I've scrawled out the basic directions for the lily pad, too. Once I finish the whole project, I'll refine it to a publishable pattern.