Flowerhead bracts with hooked spines
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- Regional Noxious Weed
- biennial weeds common in farmyards, fencelines, roadsides, streambanks and idle areas well known for their rounded flower heads with hooked spines that easily attach to clothing and animals
- common burdock (Arctium minus) grows 1 to 3 metres in height; lower leaf stalks are hollow; flower heads are less than 2.5 cm across and scattered along the stems
- great burdock, sometimes called giant burdock (Arctium lappa) is similar in appearance but lower leaf stalks are solid and flower heads are over 2.5 cm across and are arranged in a flat-topped cluster rather than along the stem
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