Allium triquetrum
Allium triquetrum is a bulbous flowering plant in the genus Allium (onions and garlic) native to the Mediterranean basin. It is known in English as three-cornered leek, in Australia as angled onion and in New Zealand as onion weed. Both the English name and the specific epithet triquetrum refer to the three-cornered shape of the flower stalks. Description 
Allium triquetrum produces stems  tall, which are concavely triangular in cross-section. Each stem produces an umbel inflorescence of 4–19 flowers in January–May in the species' native environment. The tepals are  long and white, but with a "strong green line". Each plant has two or three narrow, linear leaves, each up to  long. The leaves have a distinct onion smell when crushed. Distribution and habitat 
Allium triquetrum is native to south-western Europe, north-western Africa, Madeira and the Canary Islands, where it grows in meadows, woodland clearings, on river banks and roadside verges from sea level to an elevation of . It has also been introduced to Great Britain, Ireland, New Zealand, Turkey, Australia, California, Oregon, and South America, and is a declared noxious weed in some of those places. It has been recorded as an alien at a garden waste site on Howth Head, Ireland. Culinary uses 

All parts of the plant, from the bulb to the flowers, are edible fresh or cooked. References

External links 

Jepson Manual Interchange
Allium triquetrum at Calflora

triquetrum
Onions
Flora of California
Flora of Southern America
Flora of Europe
Flora of New Zealand
Flora of Australia
Plants described in 1753
Taxa named by Carl Linnaeus