Question for the Hive Mind: Peperomia NOID

I lead a fairly dull life. Any time not claimed by work or watering the plants at home goes to the blog, pretty much, and I only occasionally get the chance to do anything else. Sometimes this wears me down a bit, and I feel an urgent need to get out of Iowa City and go somewhere else. Usually this means going to a garden center in another city and buying more plants, which is counterproductive, obviously.

Last Wednesday was one of those days: I just couldn't stand the thought of looking at the Adenium obesum profile any more (it's since been finished), and I didn't want to water all day, and I was desperate to get out of town. So the husband and I went to Batavia, IA, a town of about 500 people roughly eighty miles to the southwest, to investigate reports of a greenhouse.

And there was one, and that's how I wound up with this Peperomia.


I know this isn't the best picture, so let me describe it too:

It's got red stems (at least where they've gotten good light), and some of the red continues up into the midvein on the underside of the leaves. The leaves are plain, smooth-edged ovals. The midvein, and a vein on either side of the midvein, are slightly sunken and very obvious. Leaves are very shiny. The habit seems to be semi-trailing, though they're upright for a while.

When I looked on davesgarden.com, I found a lot of Peperomia pictures, but none of them seemed like a terribly good match for my plant. It doesn't help that some of the options don't have pictures attached. P. humilis has leaves that come to a sharper point at the end, and the internodes seem shorter on my plant than humilis. P. scandens has the same problems, plus it lacks the red stems.

Of course this assumes that davesgarden.com is a reliable source, which it's not entirely. Other pictures of P. scandens from on-line show heart-shaped (cordate) leaves, and other pictures of P. humilis show much smaller leaves than on my plant. Glasshouse Works shows a picture of a P. buntingii that looks like a good match in one picture and completely wrong in the other. Ditto for P. glabella.

So I throw myself on the mercy of the reader. I can definitely rule out clusiifolia, obtusifolia, caperata and pereskiifolia, because I already have all of those and I know what they look like and this isn't them. But beyond that, I not only don't know, I'm not sure who to ask, or what to be looking for. Are there any Peperomia specialists in the house?