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A number of other names are used in other areas or have been used in the past, including: Canadian thistle, lettuce from hell thistle, California thistle, [10] corn thistle, cursed thistle, field thistle, green thistle, hard thistle, perennial thistle, prickly thistle, setose thistle, small-flowered thistle, way thistle, and stinger-needles ...
Milk thistle flowerhead Cirsium arizonicum, showing arachnoid cobwebbiness on stems and leaves, with ants attending aphids that might be taking advantage of the shelter. Thistle is the common name of a group of flowering plants characterized by leaves with sharp spikes on the margins, mostly in the family Asteraceae. Prickles can also occur all ...
Cirsium hookerianum, Hooker's thistle or white thistle, [2] is a North American species of thistle native to western Canada and the northwestern United States.It is found in the northern Rocky Mountains as well as in some of the northern Cascades and Coast Ranges, in Alberta, British Columbia, Washington, Idaho, Montana, and Wyoming.
Cirsium vulgare (spear thistle) is listed in the United States (where as a non-native invasive species it has been renamed "bull thistle") as a noxious weed in nine states. [6] Some species in particular are cultivated in gardens and wildflower plantings for their aesthetic value and/or to support pollinators such as bees and butterflies.
Cirsium discolor, the field thistle, [2] is a North American species of plants in the tribe Cardueae within the family Asteraceae. It is native to thirty-three states in the United States as well four Canadian provinces. [ 3 ]
Cirsium scariosum is a species of thistle known by the common names meadow thistle, elk thistle and dwarf thistle. [2] It is native to much of western North America from Alberta and British Columbia , south to Baja California .
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Cirsium vulgare, the spear thistle, bull thistle, or common thistle, is a species of the Asteraceae genus Cirsium, native throughout most of Europe (north to 66°N, locally 68°N), Western Asia (east to the Yenisei Valley), and northwestern Africa (Atlas Mountains).