Just like poison ivy, you should add giant hogweed to your mental checklist of dangerous plants. Giant hogweed is a poisonous invasive species that was intentionally introduced to the U.S. for ...

Hogweed is a noxious plant that can cause severe skin burns. The weed's watery sap makes skin sensitive to ultraviolet rays, resulting in painful skin blistering. King County plant specialists removed ...

Diversity and Distributions, Vol. 13, No. 1 (Jan., 2007), pp. 99-114 (16 pages) Several species of the genus Heracleum (Umbelliferae) were introduced into Europe from south-west Asia in the 19th ...

If you see it growing in your garden, don't touch it. The 15-foot-tall invasive plant locally known as hogweed (Heracleum mantagazzianum) was recently spotted for the first time in Virginia. Experts ...