Here are some more pictures that could use some IDs. I really need the ID of the skinny cactus in the foreground of the picture with the Bowiea in the background (last photo). The cactus usually has thick fleshy green leaves but in the winter when I stop watering it, the leaves dry up and fall off. I have recently resumed watering and you can see the new leaves at the tip of the stems. The cactus in the picture is a cutting, the mother plant is about 5' tall but just as skinny and very gangly.