Allium vineale

Allium vineale (Crow Garlic or Wild Onion) is a perennial bulbflower in the genus Allium, native to Europe, north Africa and western Asia. The species is introduced in Australia and North America, where it has become an invasive species.
All parts of the plant have a strong garlic odour. The underground bulb is 1-2 cm diameter, with a fibrous outer layer. The main stem grows to 30-120 cm tall, bearing 2-4 leaves and an apical inflorescence 2-5 cm diameter comprising a number of small bulbils and none to a few flowers, subtended by a basal bract. The leaves are slender hollow tubular, 15-60 cm long and 2-4 mm thick, waxy textured, with a groove along the side of the leaf facing the stem. The flowers are 2-5 mm long, with six petals varying in colour from pink to red or greenish-white. It flowers in the summer, June to August in northern Europe. Plants with no flowers, only bulbils, are sometimes distinguished as the variety Allium vineale var. compactum, but this character is probably not taxonomically significant.