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Polygonum sp

I'm w/ Mike on this from the flower description. Ceropegia woodii blooms are small white, pink or lt. purple rather phallic-looking blooms (excuse me, but they are); I've had them bloom in white (slightly smaller than an inch long) & have seen the lt. pink/purple blooms on the varigated version, but never seen red Ceropegia blooms. I'd agree abt Dischidia, maybe searching for blooming Dischidia images would show it, but from the description, color & size as well it sounds like it. I've seen blooming Dischidias in both white (D. picta I think) & red, maybe D. phillipenses. Also, the mention of the inflated leaf, golf ball size is something I've read happens in some Dischidias, those I believe are sometimes referred to as Ant Plants. Actually there's a Hoya Forum post that shows the small red bloom, I'll check & if I find it I'll post back.

Araujia isn't related to Orchids. If you look at the flowers you'll see they are not at all orchid-like. Flowers are a much better guide to pant id than leaves.