(15.2-76.2 cm) in height and can be either erect or sprawling. Found in a range of soil types. Flowers Lady’s Thumb (Persicaria maculosa, Polygonum persicaria) is viewed by uninformed folks as merely an invasive weed that needs whacked and disposed of quickly.But, to homesteaders and fans of wild edibles in general, discovering this plant on your land can provide a natural bounty of home remedy ingredients. Foliage Leaves are elongate, narrow and pointed at the base and tip. Smartweed reaches 1-4 feet tall. Also, the ocrea of P. maculosa has observable bristles or cilia fringe on the upper edge where the other two are usually fringeless, and P. maculosa will often have only 4 tepals and P. pensylvanica has 5. Many Polygonum species, including P. persicaria, are now placed by a number of authorities in the genus Persicaria, hence Stace (1991) uses the synonym Persicaria maculosa and Grierson and Long (1983) use Persicaria dolichopoda. Persicaria virginiana is a vigorous perennial native to Missouri. Persicaria longiseta is an annual forb that can reach 6-30 in. Ocrea have long, hair-like bristles on the margin. Read on for information about mile-a-minute weed … Persicaria maculosa. This all indicates widespread variation in the species. The state of Minnesota in the USA has declared P. persicaria as a secondary noxious weed and several states have categorized it as invasive (USDA-NRCS, 2002). Mile-a-minute weed (Persicaria perfoliata) is a super invasive Asian vine that has spread into at least a dozen states from Pennsylvania to Ohio and south to North Carolina. Broad, oval, medium green leaves. Summary 9 Persicaria maculosa (syn. Persicaria maculosa is an annual plant in the buckwheat family, Polygonaceae. NameThatPlant.net currently features 3816 plants and 23,855 images. Stems have swollen nodes with papery sheaths (ocrea). It typically forms a spreading foliage mound 2-3 feet tall and as wide or wider. Tiny, white to greenish-white, beady, jumpseed-like flowers on long, slender, wand-like stems appear in mid to late summer, but are not particularly showy. It is also present as an introduced and invasive species in North America, where it was first noted in the Great Lakes region in 1843 and has now spread through most of the continent. Photo credit: (First) Alicyn Murphy, URI CE, (second, third, fourth) Randall G. … The stems are usually light green, round, and glabrous or slightly pubescent. Persicaria maculosa, Spotted Lady's-thumb, Heart's-ease. Like P. maculosa, P. pensylvanica also has shorter and more erect racemes but those of P. maculosa are typically a bit shorter and more slender. A purplish thumbprint shape sometimes marks the leaf (see third image below). Persicaria maculosa Knotweed family (Polygonaceae) Description: This plant is a summer annual that is ½–2' tall and more or less erect, although individual plants may sprawl. For many plants, the website displays maps showing physiographic provinces within the Carolinas and Georgia where the plant has been documented. Invasive. My groundcover is a mixture of persicaria maculosa threaded through violets with a few punctuations of spiderwort, pokeweed, persicaria odorata and morning glory up the fences. Polygonum persicaria) is an annual plant in the knotweed family, Polygonaceae.Common names include lady's thumb,spotted lady's thumb, Jesusplant, and redshank.It is native to Eurasia and present as an introduced and invasive species in North America, where it was first noted in the Great Lakes region in 1843. Are you worried about controlling mile-a-minute weeds in your backyard? It is widespread across Eurasia from Iceland south to Portugal and east to Japan. It's quite lovely and virtually maintenance free. Stems are reddish. Since they're all invasive, I don't really have to weed or water except in the Spring when other invasives come up. 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