There are only two species of adder's-tongue in the world.
From the sfgate.com
Some gardeners have been successful with adder's-tongue.
From the sfgate.com
In spring, wildflowers sprinkle the hillsides and canyons, such as the pink calypso orchid, striped fetid adder's tongue and all shades of douglas iris.
From the sfgate.com
Walk the right trail and you'll see immaculate white trilliums, pink-flowered redwood sorrel, yellow violets and their eccentric neighbor, the fetid adder's-tongue.
From the sfgate.com
On from the first curtain to the last, Bates makes the evening blazingly his as a man slouching toward bedlam-hair bedraggled, trousers rumpled, eyes aglaze, and with an adder's tongue in his cheek.