PHILADELPHIA (CBS) - What's that plant that's about thigh-high with bright white flowers you see along the side of the road this time of year? It's White Snakeroot - Ageratina altissima, a member of ...

Genus/species/variety: Eupatorium rugosum 'Chocolate' (a.k.a. Ageratina altissima 'Chocolate' - botanical nomenclature is always shifting and changing. The Eupatorium genus, and many species, are ...

Gardening columnist Charlie Giedeman identified this plant as white snakeroot, a poisonous weed that grows in the Midwest. News-Democrat Q: Enclosed is a weed that has been growing in my vegetable ...

White snakeroot flowers in September and October. The blossoms are bright white and individually small, but they are arranged in rounded clusters a few inches across. The plants are two to three feet ...

Homestead dairy herds can encounter a wide variety of poisonous plants, but few have the potential to be as troublesome or frightening as white snakeroot (Ageratina altissima, formerly Eupatorium ...

Last week I noticed a new flowering “weed” in my garden. It’s tall, with notched, opposite leaves and branching heads of tiny white flowers. It’s also trying to take over. So my first question was, ...

Allelopathy is one explanation for non-native plant invasion, but native plants also can be allelopathic. We tested the allelopathic potentials of the non-native, invasive grass Microstegium vimineum ...

The Aug. 23, 1925, Quincy Daily Herald announced the launch of a statewide campaign by Illinois Gove. Len Small for the control and extermination of the pasture weed, White Snakeroot. A bulletin, ...