09/17/2025
Wild lettuce, Lactuca serriola. Santa Fe, NM.
Like many plants — even w**ds — there’s the good, the bad, and the ugly. On the positive side, Lactuca serriola contains lactucarium, a milky latex once valued for its sedative, analgesic, and antispasmodic properties. Though more commonly associated with its cousin Lactuca virosa, lactucarium earned the nickname “poor man’s opium” in 19th-century Europe, where it was used to treat insomnia, pain, coughs, and nervous disorders. In addition, young leaves of wild lettuce have long been consumed as foraged greens in Europe and the U.S., particularly during times of scarcity. For some, that same white sap signals w**d status — tough to pull, quick to bolt, and uninvited — but in folk medicine, it was considered a plant of healing. Some local herbalists infuse it into tinctures or teas for calming the nervous system, easing headaches, or gently helping with sleep. Others swear by a few chopped leaves in a salad — bitter, yes, but complex, like arugula with an attitude.
Now for the bad: L. serriola thrives in disturbed areas — roadsides, vacant lots, overgrazed fields, and the edges of cultivated land — where it outcompetes more desirable native plants for sunlight, water, and nutrients. Its ability to germinate and spread quickly makes it aggressively opportunistic. And the ugly? In agricultural settings, wild lettuce can significantly reduce crop yields and even interfere with mechanical harvesting. It is considered a noxious w**d in several states and countries due to its impact on commercial farming operations.