Herbs Giving Positive for Marijuana in Urine Test

Are there herbal combinations and greens that can show positive for marijuana in a urine drug test? We are especially interested in the greens and what might cause a postive result.

Hemp seed or oil can be confused with marijuana on a drug test, because they are basically the same plant. Hemp does not contain sufficient quantities of the psychoactive chemical delta-1-tetrahydrocannabinol (THC) that gets one high from marijuana ingestion.
Hemp seed and hemp seed oil are extremely nutritious, and are included in many health food products.
For information on false positives on drug tests when using hemp products, see www.cleartest.com/testinfo/hemp_products.htm.
I don't know of any other herbs that could give a positive for marijuana on a drug test.