prostrate knotweed |
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Polygonum aviculare |
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| Taxonomy | Family: |
Polygonaceae (buckwheat) |
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Subfamily: |
Polygonoideae |
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Tribe: |
Polygoneae |
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| Nativity | Origin unknown. Naturalized worldwide. |
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| Status |
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| Habitat | Disturbed sites |
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| Flowering | August to October |
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| Flower Color | White to pink-edged |
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| Height | Sprawling, |
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| Identification | The nodes are transluscent, becoming jagged. Flowers appear in small clusters at the leaf axils. The outer 3 petal-like sepals are not longer than the petals, a characteristic not visible without a hand lens. |
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| Similar Species |
Spotted spurge (Euphorbia maculata) is similar in form and appearance. However, it emits a milky sap from broken stems and leaves. It does not have a sheath surrounding the stem above each leaf axil. |
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| Range |  |
BONAP shows this species occurring in most counties in the state. Other sources show it in far fewer counties. All sources show it widely distributed. The map at left includes the BONAP data. |
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| Sightings |
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| Comments |
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| Images | |||||||
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| Synonyms | Polygonum aviculare var. vegetum Polygonum heterophyllum Polygonum monspeliense |
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| Common Names |
prostrate knotweed yard knotweed |
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