Myrtle Spurge or Blue Spurge
Myrtle spurge is an invasive ornamental plant that is aggressively growing in open spaces in the west. Efforts are being taken to eradicate it from the landscape. Also see: www.utahweed.org/pdf/myrtle_spurge.pdf |
White Top or Hoary Cress
White top, or hoary cress is native to Europe and has spread across the United States. It prefers disturbed areas, open meadows, watercourses, grasslands and waste areas. It grows rapidly, crowding out native species. See: utahweed.org/weed_hccss.html |
Houndstongue
Houndstongue is a native of Europe which thrives in disturbed soils along roadsides, trails, in pastures, and rangelands. Because of the bur-like seed, it spreads widely along travel corridors as a passenger on clothing or animal fur and is toxic to livestock. See: www.utahweed.org/weed_htcss.html |
Dalmatian Toadflax
Dalmatian toadflax was brought to the United States from Europe. It prefers rangeland and roadside habitat with sandy soils. It is very aggressive and hard to control due to deep roots and a thick waxy leaf cuticle. It reproduces by seed and rootstock. See www.utahweed.org/weed_dtcss.html 
Cheatgrass
Cheatgrass was introduced in the United States in the late 1800's, arriving in dirt and straw ballast in ships from Eurasia. It has spread rapidly in the Great Basin, competing with native grasses. Because it completes its life cycle quickly it drys out in June and cause a greater fire hazard than grasses that remain green longer. See www.usu.edu/weeds/plant_species/weedspecies/cheatgrass.html |
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