"Wildwood Weed"  is a 1974 hit song written and first recorded by Don Bowman and later recorded by Jim Stafford.  The song is a story about farmers who take a sudden interest in a common wildflower on their farm, and soon discover and enjoy its hallucinogenic and mind-altering properties after one of them begins to chew on one.  They begin to cultivate the plant in earnest, however, federal agents raid their property and destroy their crop.  Nevertheless, the men are undeterred by the destruction of their plants as they have saved a supply of seeds which was overlooked by the agents.  (More from Wikipedia)