Buckwheat family (Polygonaceae) ³

Summary ⁴

Persicaria longiseta is a species of flowering plant in the knotweed family known by the common names Oriental lady's thumb, bristly lady's thumb, Asiatic smartweed, long-bristled smartweed, Asiatic waterpepper, bristled knotweed, bunchy knotweed, and tufted knotweed. It is native to Asia (China, India, Russia, Japan, Malaysia, etc.), and it is present in North America and Europe as an introduced species and often a weed.

Similar species ³

There are several similar species of Persicaria in Iowa. Persicaria maculosa usually has a shorter flower cluster and darker leaf markings. The native Persicaria pennsylvanica is also very similar.

Learn more ³

Illinois Wildflowers.

Sources and Credits

1. (c) weeastdw, some rights reserved (CC BY), uploaded by weeastdw, https://www.inaturalist.org/observations/32431536
2. (c) Brad Walker, some rights reserved (CC BY), uploaded by Brad Walker, https://www.inaturalist.org/observations/16560287
3. (c) Isaac Winkler, some rights reserved (CC BY-SA)
4. Adapted by Isaac Winkler from a work by (c) Wikipedia, some rights reserved (CC BY-SA), https://en.wikipedia.org/wiki/Persicaria_longiseta

More Info

• iNat taxon page
• Biodiversity Heritage Library
• BOLD Systems BIN search
• Catalogo de Plantas y Líquenes de Colombia
• eFloras.org
• Flora of North America (beta)
• Global Biodiversity Information Facility (GBIF)
• Go Botany
• HOSTS - a Database of the World's Lepidopteran Hostplants
• IPNI (with links to POWO, WFO, and BHL)
• Maryland Biodiversity Project
• NatureServe Explorer 2.0
• SEINet Symbiota portals
• Tropicos
• USDA PLANTS database
• VASCAN by Canadensys
• World Flora Online
• 日本のレッドデータ検索システム
• 植物和名−学名インデックス YList

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