Ontario Weeds: Great burdock
Excerpt from Publication 505, Ontario Weeds,
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General Description: Very similar to Common burdock, differing from it by having solid leafstalks in the lower part of the plant, larger flower heads (usually over 2.5cm., 1in. across) on longer stalks and arranged in flat-topped clusters rather than scattered along the stems.
Burdock, first-year rosette.
Burdock, second-year plant beginning to flower.
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