The blood flower (also Mexican butterfly weed) is a type of tropical milkweed with toxic milky sap that is emetic (it makes you hurl). It’s also historically favored as a heart stimulant and worm expellent. Pretty useful for a number of potential hiking disasters, if you think about it. (Of course, if you’d quit eating those poisonous berries you probably wouldn’t need to worry about finding a natural expectorant.)
