Tag Archives: ocrea

Lady’s Thumb

This gallery contains 6 photos.

Smartweeds, members of the buckwheat family belonging to the Polygonum genus, are often difficult to separate. Two characteristics of these pictured smartweeds identify them as lady’s thumbs (Polygonum persicaria). First, the leaves are marked with a purplish blotch that someone … Continue reading

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Silversheath Knotweed

This gallery contains 8 photos.

While common knotweed (Polygonum aviculare) grows as a low mat, its close relative, silversheath knotweed (Polygonum argyrocoleon) is an erect plant. Otherwise the two knotweed species are very similar. As mentioned in my previous post on common knotweed, both plants … Continue reading

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