Cirsium ciliolatum explained

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.[1] [2] It is related to Cirsium undulatum and may be more accurately described as a variety of that species.[3]

Cirsium ciliolatum is a perennial herb growing from a rootstock branching with runner roots to a maximum height near 200cm (100inches). 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.[3]

External links

Notes and References

  1. http://bonap.net/MapGallery/County/Cirsium%20ciliolatum.png Biota of North America Program 2014 county distribution map
  2. http://www.calflora.org/cgi-bin/species_query.cgi?where-calrecnum=2121 Calflora taxon report, University of California, Cirsium ciliolatum (L. Henderson) J. Howell, Ashland thistle
  3. http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=250066361 Flora of North America, Cirsium ciliolatum