Closely related to the clover are several species of Melilotus, among which Melilotus Officinalis and Melilotus Arvensis have particularly attracted the interest of the perfume and flavor industries. The plants grow wild in most parts of Europe and Asia Minor. The above two species are used for the extraction of a Oleoresin Mellilotin. The extract is theoretically a concrete, but it is usually called a resinoid or oleoresin perhaps on account of the fact that the manufacturers present the extract in a more or less liquid form.