A spring onion, also commonly known as scallion, green onion, or salad onion, is associated with various members of the genus Allium that lack a fully-developed bulb. Harvested for their taste, they tend to be milder than other onions and may be steamed or set in salads in western cookery and cooked in many Asian recipes. Diced scallions are often used in soup, noodle and seafood dishes, and in sauces in eastern dishes, after removing the bottom quarter-inch or so of the root end. The species most commonly associated with the name is the Welsh onion, Allium fistulosum. "Scallion" is sometimes used for Allium ascalonicum, better known as the shallot. The words scallion and shallot are related and can be traced back to the Greek askolonion as described by the Greek writer Theophrastus; this name, in turn, seems to originate from the Philistine town of Ascalon (modern-day Ashkelon in Israel). The shallots themselves apparently came from farther east.