Eupatorium capillifolium
[Dog Fennel]

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Close-up views:

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I had named this plant as Artemisia scoparia (Redstem Wormwood) until June 2015 when I came across its correct identity in the local newspaper. Ironically, Artemisia scoparia might contain compounds that protect the liver [1] while Eupatorium capillifolium contains pyrrolizidine alkaloids that might cause liver damage when consumed in large quantity for prolong period. Therefore, mixing up the two plants could be dangerous.

Reference:

[1] Gilani AH, Janbaz KH. Hepatoprotective effects of Artemisia scoparia against carbon tetrachloride: an environmental contaminant. J Pak Med Assoc 1994;44(3):65-8. | Abstact |

Online Resources: | Flora of North America | Alabama Plant |