Crassula muscosa has very small, light green leaves that are densely packed around a thin stem, and the arrangement of the leaves around the stems gives them a square shape. Mexican Snowball is a succulent plant which is popular as a potted ornamental plant. It features rosettes of unusual blue-green foliage, which are often densely clustered and may form a small mound. The leaves may have a powdery coating and may develop red tints at the tips and edges.