Understanding Why There is White Stuff in My Lettuce
                                
                                
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                                    4 min read                                
                            
                                The botanical name for lettuce, *Lactuca sativa*, derives from the Latin word for milk, *lactus*, referencing the milky white sap that is a natural part of the plant. While this sap, known as lactucarium, is the most common reason for a white substance, other causes range from common plant diseases to pests, each with different implications for your dinner salad.