alfalfa: important European leguminous forage plant with trifoliate leaves and blue-violet flowers grown widely as a pasture and hay crop
herb: a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests
works council: (chiefly Brit) a council representing employer and employees of a plant or business to discuss working conditions etc; also: a committee representing the workers elected to negotiate with management about grievances and wages etc