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  4. Allium triquetrum

Allium triquetrum

Onion weed.<br>Photographer: John Barkla, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>.
Flowers of onion weed.<br>Photographer: John Barkla, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>.
Coromandel, October.<br>Photographer: John Smith-Dodsworth, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
Hutt River Trail north of Stokes Valley, Lower Hutt.<br>Photographer: Jeremy R. Rolfe, Date taken: 16 April 2006, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Hutt River Trail north of Stokes Valley, Lower Hutt.<br>Photographer: Jeremy R. Rolfe, Date taken: 16 April 2006, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Allium triquetrum flowering plants along stream bank, Auckland, Owairaka, upper Oakley Creek.<br>Photographer: Peter J. de Lange, Date taken: 28 September 0206, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
Hutt River Trail north of Stokes Valley, Lower Hutt.<br>Photographer: Jeremy R. Rolfe, Date taken: 19 September 2007, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
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Common name

onion weed

Family

Alliaceae

Authority

Allium triquetrum L.

Flora category

Vascular – Exotic

Structural class

Herbs - Monocots

NVS code

The National Vegetation Survey (NVS) Databank is a physical archive and electronic databank containing records of over 94,000 vegetation survey plots - including data from over 19,000 permanent plots. NVS maintains a standard set of species code abbreviations that correspond to standard scientific plant names from the Ngä Tipu o Aotearoa - New Zealand Plants database.

ALLTRI

Habitat

Disturbed forest and shrubland, streamsides, herbfields, bare land. Especially after spraying or other clearance to bare land.

Features

Perennial herb to about 60 cm, strong garlic smell. Bulbs to 10-15 mm diameter, with offset bulbs. Leaves 2-5, linear, fleshy, keeled, 20-60 cm long, with white papery sheaths. The leaves usually die back in late spring. Flower stalk is three-sided, 20-60 cm high, fleshy and soft, sheathed by leaves at the base. Flowers are bell-shaped, 10-15 mm long, 5 petalled, white with green stripe on the petals, on drooping stalks. Seed capsules 7 mm diameter containing small black seeds.

Similar taxa

Can be separated from other species in the Allium genus by the sharply triangular stems. Leucojum aestivum and Nothoscordum inodorum are also similar but lack the garlic odour.

Flowering

October, November

Flower colours

Green, White

Year naturalised

1899

Origin

South West Europe, North Africa

Etymology

allium: Possibly from the Latin word for garlic or the Celtic word all ‘pungent’ or ‘burning’

Reason For Introduction
Agricultural

Life Cycle Comments
Perennial. Tends to die back in late spring.

Reproduction
Reproduces by seed and vegetative reproduction

Seed
Many seeds are produced.

Dispersal
Seeds are wind dispersed. Bulbs can be dispersed by soil movement.

Tolerances
Very shade tolerant.

Foraging for onion weed


Click on the Radio New Zealand National logo to listen to This Way Up. Simon Morton interviews Johanna Knox about foraging for onion weed (duration: 12′34″)

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