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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]
Persicaria maculosa is an annual herb up to 1 metre (3 ft 3 in) tall, [11] with an erect, rather floppy stem with swollen joints. The leaves are alternate and almost stalkless.
Gamochaeta pensylvanica, the Pennsylvania cudweed [2] [3] or Pennsylvania everlasting, [4] is a widespread species of flowering plant in the family Asteraceae.It is native to South America and introduced into Eurasia, Africa, Australia, and North America.
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.
Ralph said specific native plants that were previously prohibited but allowed under the new ordinance include Canada goldenrod, daisy fleabane, dogbane, fall panicum, hoary verbena, ironweed ...
Persicaria lapathifolia is an annual herb with erect reddish stems with swollen joints, growing to a height of 20 to 80 cm (8 to 31 in). The leaves are alternate with short stalks, often densely hairy underneath.
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