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Parthenium weed (Parthenium hysterophorus)

Description
Family: Asteraceae
Form: Herbaceous – Annual

An erect aromatic annual herb 30-150 cm tall, with a deep tap root, reproducing by seed. Native to tropical North and South America. Parthenium weed is a Weed of National Significance.
Stems: Erect, much-branched in the upper half, hairy, longitudinally grooved and becoming woody with age.

Leaves:Pale green, fern-like in appearance, alternate, shortly hairy with some of the hairs containing allergy-causing substances. Rosette leaves are deeply lobed, 8-20 cm long and 4-5 cm wide. Stem leaves are shorter and less divided.
Flowers:White florets, in compact daisy-like heads 4-10 mm diameter, which are grouped together in many-branched clusters arising from the stem nodes and all terminating about the same height. Each head contains about 45 florets.
Seed: Black, 2 mm long, flattened with two white spoon-shaped appendages at the apex.
Root: A deep tap root with many finely branched feeding roots.

An agressive invader of disturbed land and perennial pastures and roadsides. Very prevalent in drier parts of Queensland and NSW, but absent from WA. Causes dermatitis and other allergic reactions to humans and cattle.

More about information Parthenium weed (Parthenium hysterophorus)


1 Komentar:

Blogger Unknown mengatakan...

apaan nih?? hahaaa

7 Juli 2014 pukul 07.36  

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