View photos of the medicinal plant Conyza canadensis (Canadian fleabane), profiled in Medicinal Plants of the American Southwest.

A passage from Medicinal Plants of the American Southwest:

An infusion of Canadian fleabane is highly useful in treating chronic intestinal inflammation, indicated by: diarrhea, attending mucus, and tissue disruption. The tea is also well used in ulcerative colitis. The plant’s tonic effect on intestinal walls has use in ‘leaky gut syndrome’, where immune responses and inflammatory mediators wreak havoc on local tissues.