This is a very common backyard weed in my area of Central Maryland. + Expand All - Collapse Specimens and Distribution. Description: Prostrate to decumbent herb, commonly mat-forming, stems to 100 cm long, often rooting at nodes. 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 … Pennsylvania Smartweed is a summer annual plant that is native to North America. Other early-emerging, annual Polygonum species include Pennsylvania smartweed (Polygonum pensylvanicum L.) Pennsylvania Smartweed (Polygonum pensylvanicum) is a dicot weed in the Polygonaceae family. Polygonum pensylvanicum is a species of flowering plant in the buckwheat family, Polygonaceae, that is native to eastern North America. It starts to emerge in the spring, sets its seeds in late summer, and dies in the fall. Cotyledons are elliptic to lanceolate in outline, whit hairs along the margins. Identification Polygonum bungeanum Turcz. ID Characteristics. Citation: PERSICARIA PENSYLVANICA (Linnaeus) M. Gómez de la Maza y Jiménez, Anales Inst. Smartweed leaves are shaped like lancets and may have purple blotches. Pennsylvania smartweed leaf. Emergence: Posted by sallyg (central Maryland) on May 17, 2020 5:26 PM. [family POLYGONACEAE ] (stored under name); Verified by Turczaninow, N.S., Polygonum pensylvanicum Bunge [family POLYGONACEAE ] Verified by Not on sheet, Leaves are lance-shaped, narrow, and willow-like. 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. Water the lawn as necessary and apply lawn fertilizer on a regular schedule. Common Names: Pennsylvania Smartweed, Pennsylvania Knotweed, Pinkweed, Pink Knotweed, Pinweed. The genus, Persicaria (L.) Mill. Also covers those considered historical (not seen in 20 years 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: Polygonum pensylvanicum (L.) Small var. 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. One of the first things you might notice is that the stems are divided into segments. There is also a perennial smartweed, swamp smartweed (P. amphimbium L.). Flamers can also help you take control of smartweed in your lawn or garden. 2004. Polygonum pensylvanicum) is a species of flowering plant in the buckwheat family, Polygonaceae. Basionym: Polygonum pensylvanicum Linnaeus 1753. This wild grain is an important food source for wildlife, but it becomes a noxious weed when it gets into garden plots and lawns. The leaves have smooth edges and sparse hairs on the surface. Pennsylvania smartweed Persicaria pensylvanicum L. Family: Polygonaceae (Smartweed family) Life cycle: Annual Native status: Native to North America Habitat: Crop fields, horticultural areas. They serve an important purpose in a number of aspects. General description: Erect or ascending growth with stems reaching 3 ft in length. Leaves are alternately attached. 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. Plants occasionally grow to 4 feet tall, but even when mowed repeatedly smartweed often manages to produce flowers. It is very similar to prostrate knotweed, except it grows in a more upright fashion and has more of an oval-shaped leaf. Polygonum pensylvanicum Polygonum pensylvanicum (L.) Small var. 2020 The Pennsylvania State University. County documented: documented to exist in the county by evidence (herbarium specimen, photograph). In Iowa this weed first evolved resistance to Group C1/5 herbicides in 1990 and infests Corn (maize). Polygonum punctatum. Group C1/5 herbicides are known as Photosystem II inhibitors (Inhibition of photosynthesis at photosystem II). Learn more about Pennsylvania Smartweed. — Pennsylvania Smartweed and Ladythumb (Polygonum pensylvanicum L. and P. persicaria L.) Life cycle: Summer annuals. Cotyledons are narrow oval to lance-shaped with rounded tips. A summer annual weed of horticultural, agronomic, and nursery crops that may reach 3 1/2 feet in height. 1753. Search this website. Any material used for herbicidal control of any plant may vary in efficacy. The most effective control methods focus on preventing the plants from producing seeds. Erect knotweed (Polygonum erectum L.) is another Polygonum species that is found in Illinois. Polygonum punctatum. The main focus of the EUNIS species component is to provide relevant information about the European species protected by Directives, Conventions and Agreements. 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. Weeds have a hard time gaining a foothold in a healthy, well-kept lawn. Threat status Europe: Not evaluated (IUCN) The EUNIS species component has very limited information about this species. Description. A distinguishing characteristic of knotweed is its swollen nodes where the leaves meet the stems. Can grow explosively in seasonal water polygonum pensylvanicum identification, receding waterlines of lakeshores or moist! 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