horse gentian

any of a genus (Triosteum) of coarse, weedy plants of the honeysuckle family, with opposite leaves, inconspicuous flowers, and leathery, orange fruit

See horse gentian in American Heritage Dictionary 4

noun
Any of various plants of the genus Triosteum, having opposite leaves, small purplish-brown flowers, and leathery orange-yellow fruit. Also called feverwort.
link/cite print suggestion box