One of the mysteries of the English language finally explained.
Any of several plants thought to resemble a snake in some way, or used to treat snakebites; especially adder's tongue, genus Ophioglossum, and †bistort, Persicaria bistorta (obsolete); compare adderwort. Now historical and rare.
Late Middle English; earliest use found in Medical Recipes. In some forms from adder + grass. In some forms from the genitive of adder + grass.
adder's grass/ˈadəz ˌɡrɑːs//ˈadəz ˌɡras/
In this article we explore how to impress employers with a spot-on CV.