Not only do stressed trees make their own aspirin to help protect themselves, they release methyl salicylate into the environment to warn other plants. I told you those plants were all talking about you.
It has also been verified that plants in laboratories under stress also produce asprin, which means your houseplants are likely doing it as well when stressed.
The release of aspirin stimulates an immune response type function in the plants.
. . . The discovery raises the possibility that farmers, forest managers, and others may eventually be able to start monitoring plants for early signs of a disease, an insect infestation, or other types of stress. At present, they often do not know if an ecosystem is unhealthy until there are visible indicators, such as dead leaves. . . ]
. . . Walnut trees stressed by drought and other factors release large amounts of an aspirin compound to reduce damage and possibly warn nearby plants, a study released Friday found. [ read more Stressed trees release aspirin compound, may communicate ]