View photos of the medicinal plant Vinca major (Periwinkle), profiled in Medicinal Plants of the American Southwest.

A passage from Medicinal Plants of the American Southwest:

Like caffeine, through Periwinkle’s vasoconstricting effect on peripheral blood vessels, it can be useful in diminishing the pain and sensitivity of an acute stage migraine headache. Systemically as well, the plant lessens passive hemorrhaging. Use it to quell mild bleeding from hemorrhoids, nosebleeds, and urinary tract injury. Profuse menstruation, as well as mid–cycle bleeding, also diminishes with Periwinkle.