Canada's Plant Hardiness Site

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Choose a species from the list below.

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family: Polygonaceae

Polygonum achoreum striate knotweed,wandering knotweed,leathery knotweed,Blake's knotweed,beakseeded knotweed
Polygonum articulatum northern jointweed,coastal jointweed
Polygonum austiniae Mrs. Austin's knotweed
Polygonum aviculare prostrate knotweed,doorweed,common knotweed
Polygonum aviculare subsp. aviculare common knotweed,prostrate knotweed,doorweed
Polygonum aviculare subsp. boreale northern knotweed
Polygonum aviculare subsp. buxiforme American knotweed,shore knotweed
Polygonum aviculare subsp. depressum small-leaf knotgrass,ovalleaf knotweed
Polygonum aviculare subsp. neglectum narrowleaf knotweed
Polygonum aviculare subsp. rurivagum narrowleaf knotweed
Polygonum douglasii Douglas's knotweed
Polygonum engelmannii Engelmann's knotweed
Polygonum erectum erect knotweed
Polygonum fowleri Fowler's knotweed
Polygonum fowleri subsp. fowleri Fowler's knotweed
Polygonum fowleri subsp. hudsonianum Hudsonian knotweed
Polygonum glaucum
Polygonum humifusum Alaska knotweed
Polygonum humifusum subsp. caurianum Alaska knotweed
Polygonum majus palouse knotweed,wiry knotweed,large knotweed
Polygonum minimum broadleaf knotweed,leafy dwarf knotweed,dwarf knotweed,zigzag knotweed
Polygonum nuttallii Nuttall's knotweed
Polygonum oxyspermum sharpfruit knotweed
Polygonum oxyspermum subsp. oxyspermum sharpfruit knotweed
Polygonum oxyspermum subsp. raii Ray's knotweed
Polygonum paronychia black knotweed,beach knotweed,dune knotweed
Polygonum patulum Bellard's smartweed
Polygonum polygaloides milkwort knotweed,whitemargin knotweed,polygala knotweed,closeflower knotweed
Polygonum polygaloides subsp. confertiflorum denseflower knotweed,closeflower knotweed
Polygonum polygaloides subsp. kelloggii Kellogg's knotweed
Polygonum polygaloides subsp. polygaloides polygala knotweed,closeflower knotweed,milkwort knotweed,whitemargin knotweed
Polygonum ramosissimum bushy knotweed,yellowflower knotweed
Polygonum ramosissimum subsp. prolificum bushy knotweed
Polygonum ramosissimum subsp. ramosissimum bushy knotweed,yellowflower knotweed
Polygonum sawatchense Sawatch knotweed
Polygonum sawatchense subsp. oblivium Sawatch knotweed
Polygonum sawatchense subsp. sawatchense Sawatch knotweed
Polygonum spergulariiforme scatter knotweed,spurry knotweed,fall knotweed

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