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Pennsylvania smartweed is a variable annual herb reaching 10 cm (3.9 in) to 2 m (6.6 ft) tall. The upright, ribbed stems are branching or unbranched. The lance-shaped leaves have a short petiole and a blade about 4–17 cm (1.6–6.7 in) long, sometimes up to 23 cm (9 in). The blade may be marked with a dark blotch.
Illustration from the Japanese agricultural encyclopedia Seikei Zusetsu (1804). Persicaria is a genus of herbaceous flowering plants in the knotweed family, Polygonaceae.Plants of the genus are known commonly as knotweeds [2]: 436 or smartweeds. [3]
Other common names for the plant include pale smartweed, curlytop knotweed, and willow weed. It is a species complex made up of a great many varying forms, sometimes considered varieties. The environment also has a strong influence on the morphology of an individual plant.
This page alphabetically lists some known plant species occurring in the US state of Pennsylvania. Currently about 2,100 native and 1,300 non-native plant species are known in Pennsylvania. [1] According Pennsylvania Department of Conservation and Natural Resources, the known species make up 37% of Pennsylvania's total wild plant flora.
In the United States, it is very similar to Pennsylvania smartweed, but redshank has a fringe of hairs at the top of the ochrea, something which Pennsylvania smartweed lacks. The species has also been found in New Zealand and Australia. [19] [20]
While interest in sustainable landscaping has grown substantially, choices often were limited in Overland Park because the 2011 ordinance listed some plant species as weeds.
[1] [2] [3] Much of the area of Soldiers Delight contains a serpentine barren that contains a number of rare and endangered species of plants. [ 4 ] [ 5 ] The following list of herbaceous plants is based greatly on the work of Ed Uebel [ 6 ] and comes from the publications by Fleming et al. 1995, [ 7 ] Monteferrante 1973, [ 8 ] Reed 1984, [ 9 ...
The Pennsylvania Fish and Boat Commission has several new regulations coming into effect Jan.1 aimed at reducing the spread of invasive species. New regulations starting Jan. 1 ask Pa. boaters ...