Unusual Blooms

Here are a few plants blooming in the greenhouse right now. This Peperomia caperata 'Purple Ripple' has flowers that look like a rat's tail.

 I've never seen a Euphorbia tirucalli bloom before, so I was surprised to discover this bloom the other day. Looks like there are a bunch more on the way in the cluster below the open bloom (in the foreground).

I'm pretty sure this is Mammillaria elongata, or Golden Star cactus. I was also surprised to find this little guy flowering.