Orchidaceae tubers after detecting the plants underground by scent. Orchids have been used in traditional medicine in an effort to treat many diseases and ailments. They have been used as a source of herbal remedies in China since 2800 BC. "Gastrodia elata" is one of the three orchids listed in the earliest known Chinese Materia Medica ("Shennon bencaojing") (c. 100 AD). Theophrastus mentions orchids in his "Enquiry into Plants" (372–286 BC). Orchids have many associations with symbolic values. For example, the orchid is the City Flower of Shaoxing, China. "Cattleya mossiae" is the national Venezuelan flower, while "Cattleya trianae" is the
Bach flower remedies indicates that there is no evidence of benefit compared with a placebo intervention. A newer systematic review published in 2010 by Ernst concluded All placebo-controlled trials failed to demonstrate efficacy. It is concluded that the most reliable clinical trials do not show any differences between flower remedies and placebos. Flower remedies are sometimes promoted as being capable of boosting the immune system, but "there is no scientific evidence to prove that flower remedies can control, cure or prevent any type of disease, including cancer". Each solution is used alone or in conjunction with other solutions, and each flower is said