Smartweed
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Pale Smartweed (Nodding Smartweed, Dock-leaved Smartweed)
Polygonum lapathifolium ...
Smartweeds are valuable wetland plants. Their seeds provide an abundant source of food for aquatic wildlife. More than 20 species occur in Michigan, including several that are non native.
Smartweed
(Polygonum hydropiper LINN.)
Click on graphic for larger image
Smartweed ...
Hairy smartweed is only located in Florida, Georgia, Alabama, Mississippi, North Carolina, and South Carolina (Kartesz, 1999).
Less similar is Dock-Leaved Smartweed also know as Curlytop Knotweed, Nodding or Pale Smartweed (P. Lapathifolium) can reach 2m (6') in height and has longer, slender flower spikes that droop and are white, pink or green.
Smartweed roots on land or at the edge of ponds and lakes in shallow water where it floats its leaves and flowers at the end of long stems.
Knotweed, Smartweed, Fleece Vine
po-LI-go-num
About 150 species of mostly annuals and herbaceous perennials, some aquatic vine-like scamblers or woody subshrubs; stems appear jointed (bamboo-like).
Fire top-kills smartweed. Smartweed can reproduce by seed or sprout from rhizomes following fire. Smartweeds usually sprout from seeds following fire. They tend to reproduce more after severe burns than after light burns.
P.
dotted smartweed; water smartweed Polygonum punctatum
Douglas fir Pseudotsuga menziesii
downy rose myrtle Rhodomyrtus tomentosus
downy wood fern Thelypteris parasitica
dwarf plantain Plantago australis ...
Longroot Smartweed [English]: Polygonum amphibium
Longroot Smartweed [English]: Polygonum amphibium var. emersum
Longroot Smartweed [English]: Polygonum emersum
Longroot Wild-Buckwheat [English]: Eriogonum lachnogynum ...
Smartweed (Polygonum capitatum)
Smoke Bush (Cotinus coggygria 'Royal Purple')
Smoke Bush (Cotinus coggygria)
Smoke Tree (Dalea spinosa)
Smoke Tree (Cotinus coggygria)
Smoke Tree (Cotinus coggygria 'Royal Purple') ...
Japanese knotweed (Fallopia japonica) is also relatively similar to some of the larger smartweeds (i.e. Persicaria spp.), such as prince's feather (Persicaria orientalis), ...
Water-pepper, smartweed (Polygonum hydropiper)
Watercress (Rorippa nasturtium-aquatica)
Wattleseed (from about 120 spp. of Australian Acacia)
White mustard (Sinapis alba)
Wild betel (Piper sarmentosum) (Southeast Asia) ...
Painter's Palette is a member of the smartweed family and a few of these have sufficiently aggressive spreading habits to make them suitable for use as groundcovers.
Fortunately there are several people who wrote to me to help identify it as "smartweed", probably "water smartweed". It is a member of the buckwheat family. (Photographed in MI)
Thanks to Susan J.
Polygonum amphibium. Water Smartweed. Harrison Lake. Near Harrison, Montana.
The plant has many English names, mostly referring to its remarkable properties: Pepper Plant, Bity Tongue, Biting Knotweed, Marsh Pepper, Smartweed, Smartass, Arsesmart, Arsenicke. Other names include: Red Knees, Bloodwort, Ciderage, and Culrage.
flower Screw tree leaf Selim, grains of Senegal pepper Sesame Sesame, wild Sesamum indicum Seseli carvi (Sevilla orange) (Shallot) Shumac Siamese ginger Sichuan pepper Sicilian sumac Sinapis alba Sisymbrium nasturtium-aquaticum Skunkweed Smartweed ...
Polygonum capitatum (Pinkhead Smartweed)
Polygonum cuspidatum var. compactum
Polygonum cuspidatum (Japanese Knotweed, Mexican Bamboo, Reynoutria)
Polygonum vacciniifolium
Polygonum virginianum (Jumpseed) ...
 See also: Green, Knotweed, Pink, Orchid, Pepper
  
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