Curlytop Knotweed (Polygonum lapathifolium) is also known as Curl-top smartweed and Pale smartweed.
Member of the Buckwheat family.
Stems - To 2m tall, glabrous. Leaves - Alternate, glabrous,
to 30cm long, 6cm wide, typically lanceolate, with impressed veins on
the adaxial surface near the midrib. Ocrea not fringed with cilia
and glabrous. Inflorescence - Terminal,
loose, panicles and axillary racemes. Each flower cluster to 8cm long(tall), 3-9mm thick, nodding.
Flowers small (2-3mm long),
creamy white to slightly pinkish, dense in cluster.
Bloom Time: July - October
Where Found: Moist soils, disturbed
sites, gravel bars, roadsides, and railroads.
Origin - Found in U.S.
and Eurasia. Probably introduced in North America.
Notes: This plant
can get quite tall and is easily distinguished by the nodding racemes of
the panicle. The leaves sometimes have a dark splotch in the center.
Thank you for posting this plant... I was having a hard time identifying one.
ReplyDeleteGlad we were able to help.
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