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Carthamus genus (Site not responding. Last check: 2007-11-05) |
 | | Distaff thistles are closely related to commercial safflower [Carthamus tinctorius L.], precluding the development and release of biocontrol agents in California. |
 | | Smooth and woolly distaff thistles are difficult to distinguish from one another and are sometimes classified as subspecies of C. |
 | | One of the main reasons for this is concern of the safety of a related cultivated crop species, Carthamus tinctorius, safflower. |
| www.cdfa.ca.gov /phpps/ipc/weedinfo/carthamus.htm (1707 words) |