Angled Onion – Allium Triquetrum

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Weeds of Wurundjeri Walk Botanical Name: Allium triquetrum A Noxious Weed Common Name: Angled Onion (or Three Cornered Garlic) Origin: Mediterranean region Photo/Line Drawing: (Photos courtesy of Ian Moodie) WWAC Weeds – Angled Onion/Allium triquetrum Page 1 of 2 Habit: Winter perennial bulb to 0.4m with strappy green leaves and white flowers. Dormant during the summer. Description: • Long, linear green leaves (stems triangular in cross-section) • White bell flowers on drooping stalks (flowers Autumn-Spring) • Crushed leaves give off a strong onion-like smell • Reproduces by seed, bulb division and formation of small bulbils on the tips of the flower stalks Dispersal: • Seed and bulbs transported by water down hills, creeks and drainage lines • Movement of contaminated soil • Ants spread seeds • Originally a garden escapee Location(s) in Wurundjeri Walk: • Found in wetter shady sites e.g. along the banks of Wurundjeri Creek and the Tributary • Also in pasture in moister sites (a ‘voracious’ invader) Indigenous plant look-alikes: N/A Weed Management/Control Methods: Almost impossible to control: • Hand dig small infestations soon after emergence and before bulbils form • Mow at bulb exhaustion (in the first 2 weeks after flowers appear). Continue for a number of years! • Chemical control (spot spray) as flower stems emerge (only via ParksWide staff or authorised contractors). This Weed Information Sheet was prepared by Wurundjeri Walk Advisory Committee, supported by a Melbourne Water Community Grant. Wurundjeri Walk Advisory Committee is appointed by Whitehorse Council, Victoria. WWAC Weeds – Angled Onion/Allium triquetrum Page 2 of 2 .

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