Achillea millefolium (weed)
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Achillea millefolium (weed) L. - (common yarrow)
This weed is native to Europe and western Asia, but is now widely distributed in many other temperate and subtropical regions. While it may be grown in gardens, it can be a serious weed in lawn and pastures, where it can form dense mats. Agricultural crops may be also affected. Further it is regarded as an environmental weed, suppressing native species. Yarrow plants have an offensive odour and bitter taste. Milk produced by cows grazing on yarrow can have an undesirable flavour.
The plants grow up to a height of about 1 m. They are hardy, drought tolerant and can survive in poor soil. The feathery leaves are typically 5-10 cm long. Reproduction is mainly through seeds, but the plants can re-emerge from the extensively branched underground system of rhizomes.
For a review see Warwick & Black, 1982.
- Other images of Achillea millefolium (weed) (Wikimedia Commons and IPM Images - click to enlarge)
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