Crow garlic | |
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Umbel showing bulbils and a few flowers | |
Scientific classification ![]() | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Monocots |
Order: | Asparagales |
Family: | Amaryllidaceae |
Subfamily: | Allioideae |
Genus: | Allium |
Species: | A. vineale
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Binomial name | |
Allium vineale | |
Synonyms[1] | |
Synonymy
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Allium vineale (wild garlic, onion grass, crow garlic or stag's garlic) is a perennial, bulb-forming species of wild onion, native to Europe, northwestern Africa and the Middle East.[2] The species was introduced in Australia and North America, where it has become a noxious weed.[3][4][5][6][7]
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 tubes, 15–60 cm long and 2–4 mm thick, waxy texture, with a groove along the side of the leaf facing the stem. The inflorescence is a tight umbel surrounded by a membranous bract in bud which withers when the flowers open. Each individual flower is stalked and has a pinkish-green perianth 2.5 to 4.5 mm (3⁄32 to 3⁄16 in) long. There are six tepals, six stamens and a pistil formed from three fused carpels. Mixed with the flowers are several yellowish-brown bulbils. The fruit is a capsule but the seeds seldom set and propagation usually takes place when the bulbils are knocked off and grow into new plants.[8][9] Plants with no flowers, only bulbils, are sometimes distinguished as the variety Allium vineale var. compactum, but this character is probably not taxonomically significant.[citation needed]
The leaves, flowers, and bulbs of Allium vineale are edible.[10] While it has been suggested as a substitute for garlic, there is some difference of opinion as to whether there is an unpleasant aftertaste compared to that of common garlic (Allium sativum).[citation needed] It imparts a garlic-like flavour and odour on dairy and beef products when grazed by livestock. It is considered a pestilential invasive weed in the US, as grain products may become tainted with a garlic odour or flavour in the presence of aerial bulblets at the time of harvest.[11][12][13] Wild garlic is tolerant to herbicides, which cannot cling well to the vertical, smooth and waxy structure of its leaves.[14][15]
Allium vineale 'Hair', a cultivated variety, is sold as an ornamental plant in the UK and USA. It has unusual flowerheads which have purple centres and green hair-like extensions.[16][17]