found: Work cat.: Roché, C.T. Identification of knapweeds and starthistles in the Pacific Northwest, 1993:p. 1 ("Except for Russian knapweed, all of the knapweeds and starthistles in this bulletin bear the genus name Centaurea.")
found: Encarta dictionary, via WWW, Mar. 22, 2007(star thistle (plural star thistles or star thistle): plant with purple flowers: a plant belonging to the daisy family. Flowers: purple, encircled by radiating spines. Native to: Europe, Asia. Genus Centaurea)
found: The American heritage dictionary of the English language, 4th ed., 2000, via WWW, Mar. 22, 2007(star thistle: Any of several plants of the genus Centaurea, especially C. calcitrapa, native to Eurasia, having spiny purplish flower heads.)
found: Web. 3(star thistle: any of various plants of the genus Centaurea)
