A frenulum (or frenum) is a small fold of tissue that prevents an organ in the body from moving too far.
Cover crops usually are grown to prevent soil loss from wind and water erosion. Use fast-growing cover crops, such as winter wheat or annual rye, on fall-spaded gardens. A second, and probably more important reason home gardeners should use cover crops is to improve soil structure and increase organic matter.
This woodsorrel is typically grown as a houseplant but can be grown outside in USDA climate zones 8aâ11, preferably in light shade. The subspecies O. triangularis subsp. papilionacea, in particular its cultivar 'Triangularis', is highly popular as a pot plant and known as love plant and purple shamrock.