Description ²

• Flower: Yellow rounded cluster
• Leaves: alternately arranged, feathery or fern-like, up to 8 inches long, compound in 4 to 10 pairs of leaflets, leaflets; 1½ inch long, hairless, stalkless, sharply toothed lobes, dotted glands, pungent odor when crushed
• Fruit/Seed: dark brown seed heads in late summer
• Height: 1-5 feet
• Flowering: July - September
• Habitat: fields, ditches, roadsides
• Other: Highly invasive noxious weed

Sources and Credits

1. (c) Kingsbrae Garden, some rights reserved (CC BY-NC-SA), http://www.flickr.com/photos/32598399@N00/1175159336
2. (c) Minnesota Scientific and Natural Areas, some rights reserved (CC BY-SA)

More Info

• iNat taxon page
• African Plants - a photo guide
• Atlas of Living Australia
• Biodiversity Heritage Library
• BOLD Systems BIN search
• Calflora
• CalPhotos
• eFloras.org
• Flora Digital de Portugal
• 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)
• Jepson eFlora
• Maryland Biodiversity Project
• NatureServe Explorer 2.0
• NBN Atlas
• New Zealand Plant Conservation Network
• OregonFlora.org
• 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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