Asphodelus fistulosus is a species of plant known as hollow-stemmed asphodel,  onionweed,  onion-leafed asphodel, and pink asphodel. It is native to the Mediterranean region. It is also a common weed in parts of Australia , New Zealand , and Mexico , and it thrives in any area with a Mediterranean climate. It is an annual or short-lived perennial herb growing a hollow stem up to 70 centimeters tall. The root system has a series of tuber -like parts at the base of the stem. The plant takes the form of a large tuft of onion-like rounded hollow leaves up to 30 centimeters long.
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Asphodelus fistulosus L. Baker Asphodelus tenuifolius Cav. Naturalised Distribution A very widely naturalised species, that is particularly common in the southern parts of Australia. Scattered populations are also found in south-eastern and central Queensland, in Tasmania, in other parts of South Australia and in the southern parts of Northern Territory.
Habitat Primarily found in warmer temperate and semi-arid regions, but also a weed of sub-tropical and arid environments. A weed of pastures, rangelands, open woodlands, grasslands, shrublands, roadsides, railway lines, disturbed sites, waste areas, coastal environs and cropping areas. Habit An upright i. It can be either short-lived or long-lived i. Stems and Leaves The upright i. These stems 2. The elongated i.
These leaves cm long and 1. They are hairless i. Up to 30 of these flowers are alternately arranged along the upper parts of the branched flowering stems i. Flowering occurs during winter, spring and summer, although most plants do not flower in the first year of growth. The fruit is an almost round i. The seeds mm long are brown or black in colour, spindle-shaped i. Reproduction and Dispersal This plant reproduces by only by seed. Seeds may be dispersed by wind, water, machinery, in agricultural produce, and in mud attached to animals and vehicles.
In Victoria it is thought to pose a serious threat to one or more vegetation communities e. This can result in a reduction in the productivity of pastures and increased management costs. The growth and spread of this species must be controlled according to the measures specified in a management plan published by the local control authority and the plant may not be sold, propagated or knowingly distributed in the Balranald, Berrigan, Conargo, Deniliquin, Murray, Wakool, Wentworth and Windouran local authority areas.
Northern Territory: A - to be eradicated throughout all of the Territory , and C - not to be introduced into the Territory. Tasmania: D - the importation or sale of this species is prohibited and measures to reduce its population in an area, eradicate it from an area, or restrict it to a particular area may be required. Victoria: C3 - a regionally controlled weed in the Glenelg, Corangamite and Wimmera in the shire of Northern Grampians only regions, where landholders must take all reasonable steps to control them and prevent their spread on their land and the roadsides which adjoin their land.
Western Australia: Prohibited - on the prohibited species list and not permitted entry into the state. Similar Species Onion weed Asphodelus fistulosus may be confused with dune onion weed Trachyandra divaricata , false onion weed Nothoscordum borbonicum , three-cornered garlic Allium triquetrum and crow garlic Allium vineale.
These species can be distinguished by the following differences: onion weed Asphodelus fistulosus has cylindrical, hollow, leaves and produces flowers that are borne along its thin, cylindrical, few-branched stems.
Onion weed Asphodelus fistulosus may also be confused with native leek Bulbinopsis semibarbata. However, this species can be readily distinguished by its smaller golden yellow flowers up to 15 mm across. Check our website at www. The control methods referred to in this fact sheet should be used in accordance with the restrictions federal and state legislation, and local government laws directly or indirectly related to each control method.
These restrictions may prevent the use of one or more of the methods referred to, depending on individual circumstances. While every care is taken to ensure the accuracy of this information, DEEDI does not invite reliance upon it, nor accept responsibility for any loss or damage caused by actions based on it.
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Asphodelus fistulosus (Onionweed)
Weeds of Australia - Biosecurity Queensland Edition Fact Sheet