Native to the Cape Provinces of South Africa, Haworthia retusa is probably the most common Haworthia in cultivation. The rosettes can get to 4 inches across and it offsets readily. The tubular flowers appear at the end of a foot long stalk and are white with pale brown stripes.
     I have a couple potfulls of this and many starts of offsets. I put one in the garden this spring, we'll see how it does.