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Photographer: Richard Bauer
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Family Polygonaceae
Persicaria lapathifolia (L.) S.F.Gray
curly-top knotweed, dock-leaved smartweed, heart's-ease
Persicaria: peach-like, the medieval name for knotweed
lapathifolia: Lapathum, a kind of Rumex
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| Status: | Native |
| Plant: | erect, annual, 2'-5' tall forb; stems with nodes either smooth or cut, but not hairy; taprooted |
| Flower: | white-green to pink, 4- or 5-parted, 1/8" long, petals and petal-like sepals connected at the base; inflorescence many 1/3"-2" long, nodding, spike-like clusters on a stalk jointed at the top; blooms July-Sept., |
| Fruit: | dry seed flat or concave on both sides |
| Leaf: | alternate, variable but usually lance-like, often woolly beneath |
| Habitat: | wet to moist; disturbed sites |
| (Glossary) |
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