Native to the Eastern Cape Province of South Africa, Haworthia cymbiformis is a clump forming rosette with very variable leaves. The rosettes can get to 6 inches across and are usually a lime green but turn red with too much light or too little water.
     This one is planted in my garden and I must have picked just the right spot for it. It's putting out offsets and should form a nice clump someday. The flower picture is of a potted one and was taken in my greenhouse in late winter.

The tiny flowers

A variegated version