Quick facts. The genus, Persicaria (L.) Mill. A Large Image of Polygonum pensylvanicum (Pennsylvania smartweed) from the USDA PLANTS database Smartweed possesses powerful nutritional properties that have been traditionally used for respiratory support, to relieve bloating, and for gastrointestinal distress.The recognized benefits of smartweed are not exclusive to herbal or … laevigatum Fern. It is very similar to prostrate knotweed, except it grows in a more upright fashion and has more of an oval-shaped leaf. Penn State Hotlines rosiflorum Polygonum pensylvanicum POLYGONUM PENSYLVANICUM Linnaeus, Sp. Plants occasionally grow to 4 feet tall, but even when mowed repeatedly smartweed often manages to produce flowers. Upcoming Virtual Trainings Starting 2021-Register NOW. Non-native: introduced (intentionally or unintentionally); has become naturalized. Pennsylvania Smartweed and Ladythumb (Polygonum pensylvanicum L. and P. persicaria L.) Life cycle: Summer annuals. Pennsylvania smartweed Persicaria pensylvanicum L. Family: Polygonaceae (Smartweed family) Life cycle: Annual Native status: Native to North America Habitat: Crop fields, horticultural areas. Polygonum pensylvanicum. Add to Bookmarks. 362. — The leaf bases form sheaths that surround the stem. — , was named and described by Philip Miller in the fourth edition of Gardener’s Dictionary in 1754. It was first named and described as Polygonum pensylvanicum by Carl von Linnaeus in the first edition of Species Plantarum in 1753. Information and resources for the Ag Sciences community. General description: Erect or ascending growth with stems reaching 3 ft in length. 1896. Also covers those considered historical (not seen in 20 years Pennsylvania Smartweed is a summer annual plant that is native to North America. Weeds have a hard time gaining a foothold in a healthy, well-kept lawn. [family POLYGONACEAE ] (stored under name); Verified by Turczaninow, N.S., Polygonum pensylvanicum Bunge [family POLYGONACEAE ] Verified by Not on sheet, A distinguishing characteristic of knotweed is its swollen nodes where the leaves meet the stems. Getting rid of smartweed begins with good cultural practices. Smartweed, also known as Polygonum hydropiperoides, is a plant that grows in low, wet environments throughout North and South America. — Some organic herbicides, such as acetic acid and citric acid, are effective at killing young smartweed plants, but they might also harm garden plants unless applied very carefully. Polygonum pensylvanicum of Michigan Flora.. Like P. lapathifolia, with which it is often associated, it may be abundant on recently exposed shores, river margins and banks, marshes, mucky hollows, old fields, moist or dry disturbed ground.. An annual, readily recognized by the large fruits and flowers, in thick, erect, pink spikes. Pennsylvania Smartweed (Polygonum pensylvanicum) Polygonaceae - Buckwheat family © Daniel Reed. 2/16: Will My Aquatic … Plant Glossary. Pennsylvania smartweed leaf. Description. laevigatum Fern. Native: indigenous. This wild grain is an important food source for wildlife, but it becomes a noxious weed when it gets into garden plots and lawns. Cotyledons are elliptic to lanceolate in outline, whit hairs along the margins. ID Characteristics. Ladysthumb (Polygonum persicaria) Click on images to enlarge . Life cycle: Summer annual Growth Habit: Prostrate Propagation: Seed Leaf Margin: Smooth Leaf Hairs: Sparse Leaf Structure: Lanceolate to elliptic or egg-shaped Leaf Arrangement: Alternate Root Type: Shallow taproot with fibrous roots Flower Color: Bright pink to white Many common roadside weeds are more than just a nuisance. There is also a perennial smartweed, swamp smartweed (P. amphimbium L.). Group C1/5 herbicides are known as Photosystem II inhibitors (Inhibition of photosynthesis at photosystem II). Emerge in the spring and set seed in late summer/fall and die. Polygonum pensylvanicum Life cycle: summer annual Growth habit: grows from 1 to 4 ft. tall; leaves alternate, lanceolate, smooth margins, sometimes with a purplish thumbprint marking the 2 to 3 in. View plant photos, descriptions, maps, treatment options, and more. Polygonum pensylvanicum Polygonum pensylvanicum (L.) Small var. Smartweed leaves are shaped like lancets and may have purple blotches. They serve an important purpose in a number of aspects. Polygonum pensylvanicum . Growth Habit: Herb/Forb As an annual, it reproduces through seeds that drop near the parent plant to produce new plants. Polygonum pensylvanicum. Leaves are lance-shaped, narrow, and willow-like. Please read the full disclaimer on herbicide usage. What Is Flame Weeding: Information On Flame Weeding In Gardens, What Is An Organic Herbicide: Using Organic Herbicides For Weeds In Lawns And Gardens, Wild Strawberry Weed Control: How To Get Rid Of Wild Strawberries, DIY Flower Pot Christmas Tree: Making A Terra Cotta Christmas Tree, Christmas Tree Allergen Info: Am I Allergic To My Christmas Tree, Seniors And Houseplants: Indoor Senior Gardening Ideas, Compass Plant Information: Tips On Compass Plant Uses In Gardens, White Strawberry Plants: Tips For Growing White Strawberries, Cold Hardy Fig Varieties: Tips For Growing Winter Hardy Figs, Melon Seed Harvesting And Storage: Tips For Collecting Seeds From Melons, Evergreen Favorite: Container Grown Olive Trees, Evergreens In My Heart – Three Must Have Evergreen Trees, Decisions, Decisions: Choosing An Evergreen In The Landscape, Spruce Trees For Landscaping - Spruce It Up With Evergreens. Erect knotweed (Polygonum erectum L.) is another Polygonum species that is found in Illinois. Water the lawn as necessary and apply lawn fertilizer on a regular schedule. Persicaria pensylvanicum is known as smartweed. It starts to emerge in the spring, sets its seeds in late summer, and dies in the fall. 2020 The Pennsylvania State University. Threat status Europe: Not evaluated (IUCN) The EUNIS species component has very limited information about this species. Leaves with branch leaves about half the size of stem leaves; narrow-elliptic to narrow-ovate, 15–50 mm long, 3–15 mm wide, 4–5 times as long as wide, apex acute. Sign up for our newsletter. Duration: Annual. Plant Characteristics. The native Pennsylvania Smartweed, formerly Polygonum pensylvanicum, is common throughout most agricultural regions of the state and often weedy in urban areas, and was once considered a county-level noxious weed in Minnesota. Pinkweed, Purple-head. A summer annual weed of horticultural, agronomic, and nursery crops that may reach 3 1/2 feet in height. Scientific Name: Polygonum pensylvanicum. Common Names: Pennsylvania Smartweed, Pennsylvania Knotweed, Pinkweed, Pink Knotweed, Pinweed. Sign up to get all the latest gardening tips! Life cycle: Summer annual Growth Habit: Prostrate Propagation: Seed Leaf Margin: Smooth Leaf Hairs: Sparse Leaf Structure: Lanceolate to elliptic or egg-shaped Leaf Arrangement: Alternate Root Type: Shallow taproot with fibrous roots Flower Color: Bright pink to white. Pl. The swollen areas that separate the segments are called “knees,” and they are covered with pale green sheaths. Description: Along first east-west road north of Bristol, 0.8 miles east of Road 15 bog: Origin: 1941-08-02 Created By: Ray C. Friesner: Contributor(s): C. H. Hobbs: Source: Identifying characteristics: The Pennsylvania smartweed is characterized by its lanced shaped leaves that are 4-20 cm long and .5-5 cm wide and are alternating on the stem. Usage Requirements. Common names include Pinkweed , Pink Knotweed , Smartweed , and Pennsylvania Smartweed . It only takes one-tenth of a second of heat from a gas torch to kill smartweed, and once killed with flame, the weed won’t return. 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. Emergence: Description: Prostrate to decumbent herb, commonly mat-forming, stems to 100 cm long, often rooting at nodes. Flamers are most useful in a vegetable garden where you have long, straight rows. Identify a weed; List of all weeds; Key to weeds in turf; Ladysthumb is a summer annual broadleaf weed that grows in moist soil. The rhizomes are white and thin; hence this weed is often called "shoestring". Polygonum pensylvanicum) is a species of flowering plant in the buckwheat family, Polygonaceae. Smartweed (Polygonum pensylvanicum) is an annual broadleaf. Search for a type of plant. Any material used for herbicidal control of any plant may vary in efficacy. Polygonum virginianum. Posted by sallyg (central Maryland) on May 17, 2020 5:26 PM. The main focus of the EUNIS species component is to provide relevant information about the European species protected by Directives, Conventions and Agreements. This species spreads by seed germinating in the early to late spring. Pennsylvania Smartweed (Polygonum pensylvanicum) is a dicot weed in the Polygonaceae family. Please note: one or more of these active ingredients may exist in combination-type brand name products. Search this website. Polygonum pensylvanicum Smartweed is a common wildflower often found growing along roadsides and railroad tracks. Polygonum punctatum. Polygonum pensylvanicum L. Images from the web. 2004. 1/19: Pond Stocking. County documented: documented to exist in the county by evidence (herbarium specimen, photograph). Find more gardening information on Gardening Know How: Keep up to date with all that's happening in and around the garden. This species has been reported in the following counties by the herbaria listed. leaf; conspicuous ocrea surrounding point where petiole meets stem © ©Thomas G. Barnes. Accessibility 2: 278. Synonyms. Family: Buckwheat or Smartweed Family (Polygonaceae) Basionym: Polygonum pensylvanicum Linnaeus 1753. Leaves are alternately attached. Frequent mowing helps keep the grass healthy, and it removes the tops of weeds, such as smartweed, before they have a chance to produce seeds. An overview of the individual specimens are provided in the table that follows. Polygonum pensylvanicum: Smartweed. Identification Polygonum bungeanum Turcz. Polygonum pensylvanicum. Before we discuss how to control smartweed, let’s take a look at a few key physical features that can help with smartweed identification. Polygonum pensylvanicum var. Stems are smooth, branched, often with reddish tint, and swollen nodes. + Expand All - Collapse Specimens and Distribution. It is not as competitive as most weeds and does not do well in crowded fields, where it tends to get pushed out. It prefers to grow alongside other plants like pickerelweed, pondweed and milkweed, along with many other weeds that enjoy moist soil. Synonyms: Persicaria bicornis, P. longistyla, P. mississippiensis, P. pensylvanica, Polygonum bicorne, P. longistylum, P. mexicanum, P. mississippiense. Learn more about Pennsylvania Smartweed. Francis. The leaves have smooth edges and sparse hairs on the surface. Emerges in very early spring and can start to bloom in May. The most effective control methods focus on preventing the plants from producing seeds. It has also been noted as an introduced species in parts of Europe and South America. It can grow explosively in seasonal water basins, receding waterlines of lakeshores or any moist disturbed area. Polygonum pensylvanicum (L.) Small var. Polygonum punctatum. Smartweeds have shallow taproots that make it easy to pull them up when you only have a few. 1753. Smartweed ( Polygonum pensylvanicum) is an annual broadleaf. Leaves are alternate, lance-shaped with pointed tips and smooth margins, usually hairless and occasionally with a purple watermark. Segunda Enseñ. Other early-emerging, annual Polygonum species include Pennsylvania smartweed (Polygonum pensylvanicum L.) The most effective control methods focus on preventing the plants from producing seeds. An up-right branched plant reaching heights of 1 to 4 feet with a shallow tap root and fibrous secondary roots. In Iowa this weed first evolved resistance to Group C1/5 herbicides in 1990 and infests Corn (maize). Privacy and Legal Statements It is native to parts of North America, where it is widespread in Canada and the United States. Barnes, T.G., and S.W. Wildflowers and ferns of Kentucky.University Press of Kentucky. While this looks like it could be Pennsylvania smartweed, (Polygonum pensylvanicum or Persicaria pensylvanica), we are not certain and our natives specialist is out today. Polygonum pensylvanicum is a species of flowering plant in the buckwheat family, Polygonaceae, that is native to eastern North America. Citation: PERSICARIA PENSYLVANICA (Linnaeus) M. Gómez de la Maza y Jiménez, Anales Inst. Cotyledons are narrow oval to lance-shaped with rounded tips. by Melody Rose (melody) September 5, 2015. How to Manage This Plant. One of the first things you might notice is that the stems are divided into segments. Pennsylvania smartweed is distributed throughout the United States. Flamers can also help you take control of smartweed in your lawn or garden. Description: Fox Prarie bog along Cicero road, 3.3 miles north of Noblesville bog: Origin: 1942-08-22 ... Pennsylvania smartweed Native Polygonaceae Polygonum: Further information on this record can be found at its source. Polygonum aviculare L. APNI* . Rake up and bag debris that may contain seed heads. As an annual, it reproduces through seeds that drop near the parent plant to produce new plants. Cultivating the garden this spring resulted in a lot of these growing, along with henbit and others. This is a very common backyard weed in my area of Central Maryland. Persicaria pensylvanica (syn. Similar Items.