Ganoderma lucidum (Leyss. ex Fr.) Karst. (Ling Zhi) (Aphyllophorales)
(the family Polyporaceae) was first indexed in the Shen Nong's Materia
Medica (206 BC-8 AD) as a longevity-promoting and tonic herb of the
non-toxic superior class, and has been used in traditional Chinese
medicine (TCM) for more than 2000 years to prevent and/or treat various
human diseases such as hepatitis, chronic bronchitis, gastritis, tumor
growth and immunological disorders. According to 'Fuzheng Guben', one of
the major TCM therapeutic principles, Ganoderma lucidum (Gl) is capable
of strengthening body resistance and improving constitutive homeostasis
in patients (Lin, 2001). The name Ganoderma is derived from the Greek
ganos/γανος "brightness, sheen", hence "shining" and derma/δερμα "skin",
while the specific epithet lucidum in Latin for "shining" and tsugae
refers to being of the Hemlock (Tsuga). Another Japanese name is
mannentake, meaning "10 000 year mushroom" (Liddell et al., 1980). The
genus Ganoderma was named by Karsten in 1881. Members of the family
Ganodermataceae were traditionally considered difficult to classify
because of the lack of reliable morphological characteristics.