Although when growing in bare areas with few other plants around willow weed will scramble along the ground, it can also grow upright under some conditions such as within crops, becoming competitive with upright weeds such as fathen and black nightshade. It is often seen as a weed and rarely cultivated. The leaf blades often have a brown or black spot in the centre and are narrowly ovate and have entire margins. Pre-emergent herbicides, especially with the chemical Dichlobenil, are effective. Stems. The stems are usually light green, round, and glabrous or slightly pubescent. Maximum height - 110 cm, the plant has a taproot, and stem from him - a single, branched, erect or ascending. De Duizendknoop is een sterke plant die vrijwel nooit problemen heeft met ziektes of plagen. P. maculata, P.maculosa, P. ruderalis, P. ruderalis, P. vulgaris, P. dubium, P. fusiforme, P. minus. Rhodora 50:64-66. Tillage and cultivation which disrupts seedlings can be effective. Accessed 12/9/13. Almost every part of this weed is edible and best consumed from mid-spring to late fall. http://www.missouriplants.com/Pinkalt/Polygonum_persicaria_page.html   Plantwise. NameThatPlant.net currently features 3816 plants and 23,855 images. Makino jetbead Rubus phoenicolasius Maxim. Note: Check federal, state/provincial, and local regulations for the most up-to-date information. The stems are usually light green, round, and glabrous or slightly pubescent. Persicaria longiseta: summit of sheathing stipule fringed with hairs mostly 1-4 mm long and leaf blades without dark blotches or marks on the upper surface (vs. P. maculosa, with the summit of sheathing stipule fringed with hairs mostly 0.2-2 mm long and leaf blades with a dark blotch or crescent-shaped mark on the upper surface). 2. 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. Missouri Plants Database. Use on-going for up to … Leaves short-petiolate; the blades lanceolate, 3–12 cm long, usually with a dark spot in the center that becomes obscure with drying; stipules brown below, scarious above, 4–10 mm long, papery, ciliate-margined, strigose to glabrous. Geographic subdivisions for Persicaria maculosa: CA : MAP CONTROLS 1. NOAA | DOC. Brit. Gebruik onze gratis mobiele apps om waarnemingen in te voeren op je smartphone of tablet. store. Persicaria maculosa (Polygonaceae) (known as lady’s thumb) is an annual morphologically variable weed that is widely distributed in Chile. Geographic subdivisions for Persicaria maculosa: CA : MAP CONTROLS 1. Other options for herbicide control  are non-selective, contact herbicides. 228(4)696-703. [11] It was first successfully transferred to the genus Persicaria by Samuel Frederick Gray in 1821, under the name Persicaria maculosa. However, white-tailed deer may chomp on it on occasion. Stems erect to decumbent, rooting at the nodes, branched, 10–80 cm. This species has fibrous roots with a shallow taproot. Solarizing black plastic will kill seeds, as will burning and acetic acid. Moul, E.T. Persicaria maculosa - is an annual plant belonging to the family Polygonaceae. … introduced annual, reproducing by seed. However, in moist conditions, stem fragments can re-root allowing re-establishment after soil disturbance. Persicaria maculosa: inflorescence dense, usually uninterrupted, 6–12 mm wide, and leaf blades lanceolate to narrow-ovate, mostly 10–25 mm wide (vs. P. minor, with the inflorescence loose and usually interrupted in the basal portion, 2–4 mm wide, and leaf blades linear to narrow-lanceolate, mostly 4–10 mm wide). Mountain, W.L., 1989. Persicaria maculosa . It also appears on some local environmental weed lists (e.g. Diseases. Persicaria maculosa 2, Perzikkruid, Saxifraga-Peter Meininger.JPG. 2008. some northern African countries. Polygonum persicaria has a high socioeconomic impact in the Great Lakes. Persicaria maculosa 1, Perzikkruid, Saxifraga-Rutger Barendse.JPG. Proposals to conserve two names in Persicaria (Polygonaceae) [conserve Persicaria mitis (Schrank) Assenov & Persicaria maculosa Gray against Persicaria mitis Delabre]. Insects. A summer annual weed of horticultural, agronomic, and nursery crops that may reach 3.5 feet in height. The leaves are alternate and almost stalkless. Previous Post. Control of the noxious weed mile-a-minute (Polygonum perfoliatum) in reforestation. Persicaria Description. There are six stamens, two fused carpels and two styles. Leaves often, but not always, have a purple spot in the middle of the leaf which resembles the mark of a lady's thumb, thus the name of this weed. some northern African countries. Persicaria maculosa S.F. Smartweed (Polygonum pensylvanicum) and closely related lady's thumb (P. persicaria) are a shade gardener's worst nightmare, because they grow best in moist partial shade.Found throughout North America, these native annuals produce thousands of hard-coated seeds. Established and naturalized in all mainland states. The seeds are very popular with granivorous songbirds. Physical When handling smartweed, do not place hands close to eyes – it contains a chemical which burns. Pl. Pl. Op vers omgewerkte grond kan Perzikkruid snel ontwikkelen uit zaad dat in die grond heel lang kiemkrachtig blijft. The alternate … argentea Gray Persicaria mitis Delarbre, 1800 Persicaria vulgaris Samp. http://en.wikipedia.org/wiki/Persicaria_maculosa, GLERL 4840 S. State Rd., Ann Arbor, MI 48108-9719 (734) 741-2235 Persicaria maculosa Gray is an accepted name This name is the accepted name of a species in the genus Persicaria (family Polygonaceae). Brit. It has been introduced to North America and is naturalised throughout the mainland continent,[15] growing along roadsides, riverbanks, and on fallow ground. A yellow dye can be produced from this plant with alum used as a mordant. Alt Name. 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). Older leaves are usually only slightly hairy. Lake Michigan Field Station, 1431 Beach St., Muskegon, MI 49441-1098 (231) 759-7824 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. Systemic herbicides to kill the fibrous roots can also work well. Persicaria longiseta is an annual forb that can reach 6-30 in. Agrobase Canada. The fruit is a shiny black, three-edged achene. Spotted ladysthumb (redshank, lady’s-thumb) Polygonum persicaria (Persicaria maculosa) Annual, seed-propagated weed with ramified taproot. The ocreas of ladysthumb have stiff hairs arising from the top of the ocrea, which are approximately 2 mm long. Leaves taper to short petioles, which have an ocrea that encircles the stem. General information about Persicaria maculosa (POLPE) Euromediterranean region, Caucasus, Siberia, Central Asia, China, Korea. Polygonum agreste Fr., 1839 Polygonum benearnense Gand., 1882 Polygonum dubium Stein Polygonum lapathifolium subsp. Fruit is a black achene. California county polygons can be turned off and on in the layer control box. Polygonum persicaria) is an annual plant in the buckwheat family, Polygonaceae.Common names include lady's thumb, spotted lady's thumb, Jesusplant, and redshank. P. persicaria can be very competitive with crop plants, particularly in moist soils and as such can have significant economic impacts in the requirements for use of increased tillage and herbicides, though exact data on costs due to the presence of this species are not known. Family Name: Polygonaceae - Smartweed or Buckwheat Family. Gray: PEMA24: Persicaria maculosa Gray: PEPE18: Persicaria persicaria (L.) Small, nom. View plant photos, descriptions, maps, treatment options, and more. datasets have provided data to the NBN Atlas for this species.. Browse the list of datasets and find organisations you can join if you are interested in participating in a survey for species like Persicaria maculosa … Een eenjarige soort uit de Duizendknoopfamilie is Perzikkruid, Persicaria maculosa. Stems are branched, often reddish in color and swollen at the nodes. EDDMapS Distribution - This map is incomplete and is based only on current site and county level reports made by experts, herbaria, and literature. Mowing before flowering can reduce seed set. Learn more about Pink Smartweed. Persicaria mitis maculosa Plantarum seu stirpium icones, deel 1, M. de Lobel (1581) Hortus Romanus juxta Systema Tournefortianum, deel 8, Giorgio Bonelli (1783-1816) Unsere Unkräuter, Zweite Auflage, L. Klein (1926) Iconographia botanica seu plantae criticae, H.G.L. coronavirus. Persicaria maculosa S.F. http://www.plantwise.org/KnowledgeBank/Datasheet.aspx?dsid=42691. The inflorescence is a dense spike. Get the latest updates and best practice advice from our 50 trial farmers, as well as scientific insights from our partners ADAS and Agspace. The list of references for all nonindigenous occurrences of Persicaria maculosa are found here. Tillage is not generally an option in wet areas. L. curlytop knotweed . [7][8], Persicaria maculosa is an annual herb up to 80 cm (31 in) tall, with an erect rather floppy stem with swollen joints. Names and dates are hyperlinked to their relevant specimen records. J Environ. science. maculosa: From Latin ‘macula’ blotch, meaning full of blotches or mottled Mobiele applicaties Onze partners. Persicaria puritanorum: Duizendknoop is een plantengeslacht uit de duizendknoopfamilie (Polygonaceae).Tegenwoordig hoort deze naam bij het geslacht Persicaria, maar vroeger maakten de planten die nu dit geslacht vormen, deel uit van geslacht Polygonum, en hoorde deze Nederlandse naam bij dat geslacht.Het genus Polygonum is veel kleiner geworden en heeft een nieuwe Nederlandse naam gekregen: het geslacht Varkensgras. [18] It likes moist soils, particularly rich ones, and acid peaty loams. Biological Control 51: 450–457. Family: Buckwheat or Smart… [6][9][10], The species was first described, as Polygonum persicaria, by Carl Linnaeus in 1753. The leaves of grass are linear-lanceolate shape, and the base they are wedge-narrowed. 2013. The species has also been found in New Zealand and Australia. Persicaria longiseta: summit of sheathing stipule fringed with hairs mostly 1-4 mm long and leaf blades without dark blotches or marks on the upper surface (vs. P. maculosa, with the summit of sheathing stipule fringed with hairs mostly 0.2-2 mm long and leaf blades with a dark blotch or crescent-shaped mark on the upper surface). 2012. Leave a comment. Remediation of nitrite contamination in ground and surface waters using aquatic macrophytes. 3. Its leaves and young shoots may be eaten, but this plant is not grown commercially for this purpose. Hønsegress (Persicaria maculosa) Posted on 16 08 2013. The information has not received final approval by the U.S. Geological Survey (USGS) and is provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the information. Persicaria houdt van vochtige grond die goed gedraineerd is. Pre-emergent herbicides, especially with the chemical Dichlobenil, are effective. Taxon 48: 829-830. Quite often on top of the leaves have a reddish stain. For many plants, the website displays maps showing physiographic provinces within the Carolinas and Georgia where the plant has been documented. Robert H. Mohlenbrock @ USDA-NRCS PLANTS Database / USDA NRCS. The latter has narrower leaves, usually less than 1 cm wide. A Dangerous Weedy Polygonum in Pennsylvania. General information about Persicaria maculosa (POLPE) Euromediterranean region, Caucasus, Siberia, Central Asia, China, Korea. Lady’s Thumb is a summer annual, competitive, broadleaf weed that reproduces by seeds. Gaps in Knowledge/Research Needs Species of flowering plant in the knotweed family Polygonaceae, International Code of Nomenclature for algae, fungi, and plants, "List of invasive species in the Great Lakes Great Lakes United / Union Saint-Laurent Grands Lacs", Biota of North America Program 2014 state-level distribution map, International Code of Nomenclature for algae, fungi, and plants (Melbourne Code), "The biology and non chemical control of Redshank (, photo of herbarium specimen at Missouri Botanical Garden, collected in Missouri in 1983, https://en.wikipedia.org/w/index.php?title=Persicaria_maculosa&oldid=982588813, Short description is different from Wikidata, Articles with failed verification from May 2019, Creative Commons Attribution-ShareAlike License, This page was last edited on 9 October 2020, at 02:26. Chemical control. maand. Persicaria maculosa. Persicaria maculosa. [14], Persicaria maculosa is native to Europe and Asia, where it can be mistaken for Polygonum minus. Scabrous to sparsely puberulent annual. Cell Physiol. Rawat, SK., RK Singh, and RP Singh. No need to register, buy now! [12] The name "Persicaria persicaria" cannot be used because tautonyms – binomial names that use the same word for both the genus and the species epithet – are prohibited by the International Code of Nomenclature for algae, fungi, and plants, and a replacement name (nomen novum) must be used. [5][6] 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. Mile-a-minute (Polygonum perfoliatum L.) update – distribution, biology, and control suggestions. Etymology. Lady’s thumb: Click here for Great Lakes region collection information, http://www.ppws.vt.edu/scott/weed_id/polpe.htm, http://www.easy-butterfly-garden.com/polygonum-persicaria.htm, http://www.missouriplants.com/Pinkalt/Polygonum_persicaria_page.html, http://www.plantwise.org/KnowledgeBank/Datasheet.aspx?dsid=42691, http://en.wikipedia.org/wiki/Persicaria_maculosa, Jennifer Anderson @ USDA-NRCS PLANTS Database. The stems are sometimes, but far from always, flushed with red - hence the common name. Phylum: Magnoliophyta - Class: Equisetopsida - Order: caryophyllales - Family: Polygonaceae The beauty of some wildflowers, of which Redshank is a prime example, is overlooked by all but those who stoop to study them close up. [13] For this reason the transfer of the species to Persicaria by John Kunkel Small in 1903, which used the tautonym, is invalid. Its common name ‘smartweed’ reflects that this plant contains a chemical compound which causes a burning sensation and mild irritation. No arthropods known to attack this species specifically have been identified (Plantwise 2013). Willow Weed Botanical name: Persicaria maculosa Family name: Polygonaceae Overview. spa. Management of this species in agricultural settings focuses on elimination of seed as a contaminant and cultivation to prevent seedling establishment. Categories. A thin membranous sheath called an ocrea encircles the stem at the base of each leaf petiole. The biology and non-chemical control of Redshank (Persicaria maculosa Gray) W Bond, G Davies, R Turner HDRA, Ryton Organic Gardens, Coventry, CV8, 3LG, UK Redshank (Lady’s thumb, lakeweed, peachwort, pink persicaria, red legs, red spot, saucy Alice, Virgin Mary’s pinch, willow weed) Persicaria maculosa Gray (Polygonum persicaria L.) NON-CHEMICAL CONTROL . Also known as Persicaria maculosa, the flowers attracts Halictid bees, wasps, and Syrphid flies. 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. The perianth of each tiny pink flower consists of four or five lobes, fused near the base. The leaves can be used as treatment for poison ivy and stomach pains. Persicaria maculosa (syn. Species of Persicaria can be controlled with glyphosate, 2,4-D, aminopyralid, clopyralid, dicamba, triclopyr or imazapyr, but all these compounds will adversely affect other plant species, including desirable species (DiTomaso et al., 2013). Vanwege de roze kleur van de kleine bloemen genoemd naar de perzik. De glanzende, eironde bladeren zijn ongesteeld met vliezige kokertjes bij de knopen, met tanden die uitlopen tot haartjes. Plant contains a chemical which burns or buckwheat family, Polygonaceae op je of... Bristles on the upper end entire margins kill seeds, as will burning and acetic acid 5.1 Spray. 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