Three-cornered leek (Allium triquetrum), also called three-cornered garlic, onion weed, angled onion or snowbell, is a wild spring allium foraged across the British Isles and the Mediterranean for its mild garlic-onion flavour. Its most distinctive feature is the stem: instead of a round stalk it has a sharply three-sided, triangular cross-section, giving the plant both its Latin and common names. The whole plant is edible — the tender green leaves, the crisp lower stems, the little papery bulbs and the pretty white bell-shaped flowers all taste gently of garlic and onion, milder and sweeter than a clove of garlic and softer than a scallion. Foragers chop the leaves into salads, pestos, soups, butters and omelettes, scatter the flowers as an edible garnish, and treat it much as they would wild garlic (ramsons) or chives. In much of the world beyond its native range, though, it is better known as an aggressive garden invader — the "onion weed" of Australian, New Zealand and Californian gardeners.