yellow witch hazel
From this article: "The name “witch hazel” alludes to a historical association between the plant and witches and magic. It has been thought to protect one from witches; the medieval English word wych, meaning “flexible,” may have been correlated and applied to the characteristically flexible witch hazel branches.
Modern witches consider witch hazel a magical herb and utilize it in spells to guard against evil influences and to heal broken hearts. Its bark and leaves are also used as astringents in herbal healing baths. Dowsers or water witches use the forked branches of witch hazel to find subterranean water, lost items, or hidden treasures beneath the earth."
This site gives this explanation for the name: "American witchhazel posses some interesting lore and uses. The most interesting use as been the use of forked limbs as dowsing or divining rods. Early European settles observed Native Americans using American witchhazel to find underground sources of water. This activity is probably where the common name witchhazel came from. “Wicke” is the Middle English for “lively’ and “wych” is from the Anglo-Saxon word for “bend.” American witchhazel was probably called a Wicke Hazel by early white settlers because the dowsing end of the forked branch would bend when underground water when detected by the dowser. This practice had a widespread use by American settlers and then exported back to Europe. Dowsing became an established feature of well-digging into the 20th century."