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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.
Smartweed: Polygonum spp. Perennial 8 9 feral major F Selfheal: Prunella vulgaris: Perennial 7 8 no feral minor F Lungwort: Pulmonaria spp. Perennial 5 5 no feral minor F Appalachian mountain mint: Pycnanthemum flexuosum: Perennial 8 10 minor F Azalea: Rhododendron spp. Perennial 6 8 no ornamental minor F Russian sage: Salvia × floriferior ...
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]
Persicaria virginiana, also called jumpseed, [2] Virginia knotweed or woodland knotweed [3] is a North American species of smartweed within the buckwheat family. It is unusual as a shade-tolerant member of a mostly sun-loving genus. Jumpseed is a perennial, named for its seeds which can "jump" several feet when a ripe seedpod is disturbed.
Persicaria lapathifolia (syn. Polygonum lapathifolium), known as pale persicaria, [2] is a plant of the family Polygonaceae.It is considered to be native throughout most of the world, from arctic to tropical realms, except South America and Southern Africa. [3]
Smartweed: Polygonum spp. Aug – Sep Common Chickweed: Stellaria media: Apr – Jul minor source Germander: Teucrium chamaedrys: Jul – Aug Alsike Clover: Trifolium hybridum: yellow brown good source Crimson Clover: Trifolium incarnatum: dark brown White Clover: Trifolium repens: Jun – Jul caledonian brown good source Cat-tail: Typha ...
Swamp smartweed is quite variable and is sometimes divided into several varieties, some of which may be better treated as species in their own right. [2] In general, swamp smartweed is a rhizomatous perennial herb growing upright or erect and approaching a maximum height of one meter (40 inches). Roots may emerge from nodes on the lower stem.
The Polygonaceae are a family of flowering plants known informally as the knotweed family or smartweed—buckwheat family in the United States. The name is based on the genus Polygonum , and was first used by Antoine Laurent de Jussieu in 1789 in his book, Genera Plantarum . [ 2 ]