Cirsium ciliolatum is a species of thistle known by the common name Ashland thistle. It is endemic to the Klamath Mountains, where it is known from only a few occurrences in Jackson and Josephine Counties in Oregon, as well as neighboring Humboldt and Siskiyou Counties in California.[3][4] It is related to Cirsium undulatum and may be more accurately described as a variety of that species.[5]

Cirsium ciliolatum

Vulnerable  (NatureServe)[1]
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Cirsium
Species:
C. ciliolatum
Binomial name
Cirsium ciliolatum
Synonyms[2]
  • Carduus ciliolatus (L.F.Hend.) A.Heller
  • Cirsium breweri subsp. howellii (Petr.) Petr.
  • Cirsium howellii Petr.
  • Cirsium undulatum var. ciliolatum L.F.Hend.

Cirsium ciliolatum is a perennial herb growing from a rootstock branching with runner roots to a maximum height near 200 cm (79 in). It is cobwebby with fibers. The gray-green woolly leaves are smooth along the edges to deeply lobed, sometimes spiny and cobwebby, and up to 25 centimeters at the longest. The inflorescence is a cluster of several flower heads each about 2 centimeters long and up to 5 wide. The head is lined with sticky, spiny phyllaries and packed with white to lavender flowers. The fruit is an achene with a thick body a few millimeters long and a pappus about 1.5 centimeters in length.[5]

References

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  1. ^ "NatureServe Explorer". NatureServe Explorer. NatureServe. 2022. Retrieved 19 May 2022.
  2. ^ The Plant List, Cirsium ciliolatum (L.F. Hend.) J.T. Howell
  3. ^ Biota of North America Program 2014 county distribution map
  4. ^ Calflora taxon report, University of California, Cirsium ciliolatum (L. Henderson) J. Howell, Ashland thistle
  5. ^ a b Flora of North America, Cirsium ciliolatum
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