Web Directory

» A Close-up View of Two Thistles
   Photographic study by Brian Johnston of Cirsium vulgare and Carduus nutans, with fine images of flowers, stems and prickles.
   http://www.microscopy-uk.org.uk/mag/artjun04/bjthistle.html

» A Close-up View of the Canadian Thistle
   Photographic study by Brian Johnston of the creeping thistle, Cirsium arvense, with many fine images, both macroscopic and microscopic.
   http://www.microscopy-uk.org.uk/mag/artaug06/bj-CanThistle.html

» Bull Thistle: Cirsium vulgare
   Photographs of varying stages in the growth of this biennial thistle with its description and identifying characteristics.
   http://www.ppws.vt.edu/scott/weed_id/cirvu.htm

» Canada Thistle: Cirsium arvense
   Photographs of varying stages in the growth of this perennial plant, with its description and identifying characteristics.
   http://www.ppws.vt.edu/scott/weed_id/cirar.htm

» Cirsium acaule: Dwarf Thistle
   Photograph, identification and distribution.
   http://homepage.ntlworld.com/david.scott40/07/0711/071142.htm

» Cirsium altissimum: Tall Thistle
   Photographs of leaves and flowers of this biennial plant, with its description and identifying characteristics.
   http://www.ppws.vt.edu/scott/weed_id/ciral.htm

» Cirsium arvense
   Several photographs of the Creeping Thistle and some identifying features.
   http://www.plant-identification.co.uk/skye/compositae/cirsium-arvense.htm

» Cirsium eriophorum: Woolly Thistle
   Photograph, identification and distribution.
   http://homepage.ntlworld.com/david.scott40/07/0709/070915.htm

» Cirsium eristhales: Yellow Melancholy Thistle
   Photograph, identification and distribution.
   http://homepage.ntlworld.com/david.scott40/07/0709/070905.htm

» Cirsium heterophyllum
   Several photographs of the Melancholy Thistle and some identifying features.
   http://www.plant-identification.co.uk/skye/compositae/cirsium-helenioides.htm

» Cirsium heterophyllum: Melancholy Thistle
   Photograph, identification and distribution.
   http://homepage.ntlworld.com/david.scott40/06/0611/061151.htm

» Cirsium incanum
   Photograph, description, distribution, ecology and economic significance.
   http://www.agroatlas.spb.ru/en/content/weeds/Cirsium_incanum/

» Cirsium occidentale var. californicum
   Image of California Thistle.
   http://www.callutheran.edu/wf/chap/flowers/fwr-281.htm

» Cirsium oleraceum: Cabbage Thistle
   Photograph, identification and distribution.
   http://homepage.ntlworld.com/david.scott40/07/0712/071273.htm

» Cirsium palustre
   Two photographs and a description of the Marsh Thistle.
   http://www.plant-identification.co.uk/skye/compositae/cirsium-palustre.htm

» Cirsium setosum
   Photograph, description, distribution, ecology and economic significance of bristly thistle.
   http://www.agroatlas.ru/en/content/weeds/Cirsium_setosum/

» Cirsium spinosissimum: Spiniest Thistle
   Photograph, identification and distribution.
   http://homepage.ntlworld.com/david.scott40/07/0714/071455.htm

» Cirsium undulatum
   Photographs of plant, flowers and foliage.
   http://www.em.ca/garden/native/nat_Cirsium%20undulatum.html

» Cirsium vulgare
   Photographs and description of the Spear Thistle, including one in its natural habitat on the Isle of Skye.
   http://www.plant-identification.co.uk/skye/compositae/cirsium-vulgare.htm