Smooth Horsetail – Native Plant of the Day 10/22/2023
Photo from 6/21/2011. Location: Hull’s Gulch National Recreation Trail, Ada County, ID.
More photos / info at the Equisetum laevigatum detail page.
Smooth Horsetail – Equisetum laevigatum
Also NPOD 10/22/2011, 10/22/2012, 10/22/2013, 10/22/2014, 10/22/2015, 10/22/2016, 10/22/2017, 10/22/2018, 10/22/2019, 10/22/2020, 10/22/2021, 10/22/2022
The attached link also needs to be included in this description of this “wildflower,” as it is an invasive species that can completely take over a garden and large areas of established native prairie. It is also extremely difficult to eradicate.
https://homeguides.sfgate.com/kill-scouring-rush-horsetail-28062.html
Note that the article you reference does not mention Equisetum laevigatum specifically; it references three other species in the genus which have a greater reputation for “aggressive behavior.” Also, a species that might be particularly weedy in some areas may not be weedy in other areas.