Rock Plants.... Seriously?

When we visited Janet's garden last month I saw some plants I don't recall ever having seen before.  Called Lithops, living stones or pebble plants, these are plants that have evolved to look like rocks.

Which Are The Rocks?

The appearance of these plants helps camouflage them from hungry animals in their native South Africa and Namibia environment.

We were fortunate to see that a couple of Janet's Lithops were coming into flower; they looked like the "rocks" had split open to reveal smaller rocks inside.  They should eventually produce a flower which will go to seed.

Split "Stone"

I think these are really interesting plants.