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Canada Thistle
Plant
Cirsium arvense is a perennial species of flowering plant in the family Asteraceae, native throughout Europe and northern Asia, and widely introduced elsewhere. The standard English name in its native area is creeping thistle. Wikipedia
Scientific name: Cirsium arvense
Family: Asteraceae
Kingdom: Plantae
Rank: Species
Higher classification: Cirsium
Did you know: The Canada thistle is the only thistle with female and male flowers appearing on separate plants.
South Dakota State Noxious Weed
Type | Information |
Toxicity | Non-toxic. |
Control | Cutting or mowing, biological, re-vegetation (competing crops) and herbicide. Contact your County Weed District or local Applicator for more information. See 525N for herbicide recommendations. |
Habitat | Wetter habitat or disturbed ground, including ditch banks, overgrazed pastures, tilled fields or abandoned sites. |
Root | Extensive vertical and creeping horizontal roots. |
Leaf Shape | Lance-shaped and shallow-lobed. |
Lifespan | Perennial; two years or longer. |
South Dakota State Weed | Abundant in South Dakota and widespread in many counties. |
Similar Looking Plants | Wavy leaf and bull thistles. |
Important Information | Hard to manage due to extensive nutrient stores and root systems; combinw integrated weed management (IWM) for effective control. The root system accounts for much of the re-establishment of the plant. |
Common Tansy
Plant
Tansy is a perennial, herbaceous flowering plant of the aster family, native to temperate Europe and Asia. It has been introduced to other parts of the world, including North America, and in some areas has become invasive.Wikipedia
Scientific name: Tanacetum vulgare
Higher classification: Tanacetum
Rank: Species
Did you know: Word "tansy" is derived from Greek word "Athanaton" which means "immortal"
Lawrence County Locally Declared
Type | Information |
Toxicity | Can cause abortions in humans if ingested; will cause liver damage in some livestock, but it is largely palatable. |
Control | Mechanical and herbicide. Contact your County Weed District or local Applicator for more information. See 525N for herbicide recommendations. |
Habitat | Full sun and moist habitats along stream banks, irrigation ditches, trails and roadsides, lawns and gardens, waste areas, vacant lots and pastures. |
Root | Extensive, spreading root system. |
Leaf Shape | Alternate on stem and fern-like. |
Lifespan | Perennial; two years or longer. |
Locally Declared | Abundant in Lawrence County and other Black Hills counties. |
Similar Looking Plants | Tansy ragwort and camphor tansy. |
Important Information | Often still planted and cultivated as an ornamental. Also can be used as a natural insect repellent. |
Common Mullein
Plant
Verbascum thapsus is a species of mullein native to Europe, northern Africa, and Asia, and introduced in the Americas and Australia. It is a hairy biennial plant that can grow to 2 m tall or more. Wikipedia
Scientific name: Verbascum thapsus
Family: Scrophulariaceae
Higher classification: Mullein
Rank: Species
Order: Lamiales
Kingdom: Plantae