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Flodman's thistle
Scientific Name: Cirsium flodmanii
Family: Asteraceae
Category: Dicot
Growth: Forb/herb
Duration: Perennial
Other Names:
Flodman's Thistle (Cirsium flodmanii)
Flodman's Thistle, scientifically known as Cirsium flodmanii, is a perennial thistle native to North America. It's also known by the common names Prairie Thistle or, in French, "chardon de Flodman."
Considerations for Pets
- The plant has spiny bracts on its flower heads.
Considerations for Children
- The plant has spiny bracts on its flower heads.
Taxonomy and Nomenclature
- Scientific Name: Cirsium flodmanii (Rydb.) Arthur
- Family: Asteraceae (Sunflower Family)
- Genus: Cirsium
- Species: flodmanii
Distribution and Habitat
- Flodman's Thistle is native to the northern central United States and Canada.
- It is occasionally found as an adventive species in New England.
- It can be found growing on ant mounds, badger mounds, buffalo wallows, potholes, and in lightly disturbed areas.
- It has been observed in Colorado and is found in all of North Dakota.
Ecological Role
- While native, Flodman's Thistle can be more competitive than other native species and has the potential to infest large areas.
- It is tolerant of highly disturbed areas.
Morphological Characteristics and Growth Habits
- It is a perennial thistle that blooms midsummer.
- It spreads by rhizomes, tending to form patches as it grows by root sprouting.
- It has a ribbed stem and widely spaced, nearly spineless leaves, which distinguishes it from other thistles.
- Forms a basal rosette.
- Flower heads are reddish purple to rose, 1 to 2 inches across.
- Mature, flowering plants have stems and leaves.
Interactions with Other Organisms
- The flowers are a nectar and pollen source for many butterflies and bees.
Further Information
- USDA-NRCS PLANTS Database
- U of M Herbarium
- T.S. Bakshi Herbarium