Thanks for the help, everybody. I reposted this thread with pictures of the flowers in the Name this Plant forum. I'm sorry the pictures aren't ideal. This plant is somehow hard to capture with a phone camera. Here's the new thread: http://forums2.gardenweb.com/discussions/3251535/m=23/please-help-id-this-plant-coffee-plant

Probably Selenicereus anthonyanus. Do you have a picture of the flower? What colour are they? There are two other plants with this kind of stems, and a few hybrids. The main difference is in the flowers. It is often called rick rack cactus, fishbone cactus or zig zag cactus. Great plant.

It does look like an oregano plant and I thought that initially, but I really don’t smell anything when I bruise the leaves. Plus, I’ve never grown oregano in that garden. Yes, Lamium!! I purchased several varieties of Lamium years ago and planted in my gardens because it doesn’t take over and is not as invasive as some other ground covers.

I believe it to be Epiphyllum oxypetalum aka Queen of the Night. These are tropical type cactus so do not treat like a cactus from a dry environment. Here’s some info.