Persicaria lapathifolia (L.) Gray  
Family: Polygonaceae
curly-top knotweed, dock-leaved smartweed, heart's-ease, pale smartweed
[Polygonum incarnatum Elliott, Polygonum lapathifolium L., Polygonum lapathifolium subsp. pallidum L., Polygonum lapathifolium var. incanum L., Polygonum lapathifolium var. nodosum L., Polygonum lapathifolium var. ovatum L., Polygonum lapathifolium var. prostratum L., Polygonum lapathifolium var. salicifolium L., Polygonum nodosum Pers., Polygonum oneillii Brenckle, Polygonum pensylvanicum var. oneillii L., Polygonum scabrum Moench, Polygonum tomentosum Schrank]
Persicaria lapathifolia image
Emmet J. Judziewicz  
Etymology: Persicaria: peach-like, the medieval name for knotweed
Plants: erect, annual, 2'-5' tall forb; stems with nodes either smooth or cut, but not hairy; taprooted
Leaves: alternate, variable but usually lance-like, often woolly beneath
Flowers: 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.,
Fruits: dry seed flat or concave on both sides
Habitat: wet to moist; disturbed sites
Persicaria lapathifolia image
Kitty Kohout  
Persicaria lapathifolia image
Botanical Illlustration  
Persicaria lapathifolia image
Botanical Illustration  
Persicaria lapathifolia image
Botanical Illustration  
More Images    View Genus       View Specimen Records       Close window