The Big Thompson Conservation District has been monitoring and mapping noxious weeds all summer and in addition to finding many noxious weeds, found the following dangerous weeds in the Little Thompson watershed:
Jimson weed – Jimson weed is a summer annual broadleaf plant. All of its parts, particularly the seeds, contain alkaloids and when ingested are toxic to humans and livestock. Other names for the plant include Devil's Snare, Hell's Bells, Devil's Trumpet, Devil's weed, Tolguacha, Jamestown weed, Stinkweed, Locoweed, Pricklyburr and Devil's Cucumber.
Poison-hemlock – Poison-hemlock is acutely toxic to people and animals. The poisons in hemlock are so deadly that people have died after eating game birds that had eaten hemlock seeds. Poison-hemlock can be confused with wild carrot (Daucus carota, or Queen Anne's Lace), as with many other members of the parsley family that resemble it. It has hairless hollow stalks with purple blotches. It can get quite tall, sometimes up to eight feet or higher.
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Bioengineering for bank stabilization means incorporating living and dead trees into the materials used to build up eroded riverbanks as opposed to riprap, which is rocks. It's not just boulders, true riprap rock has a certain specific gravity and is quarried to have angles so it has more of a grip when pummeled by floodwater. But bioengineering is more resilient, and better for the riparian ecosystem.
The following links/documents will provide more information about bioengineering for bank stabilization (large files may take several moments to load, please be patient):