The historian and sinologist Joseph Needham connected myths about Magu the Hemp Damsel with early Daoist religious usages of cannabis. Cannabis sativa is described by the oldest Chinese pharmacopeia, the (ca. 100 CE) Shennong Bencaojing (Shennong's Materia Medica Classic). The flowers when they burst (when the pollen is scattered) are called [mafen] or [mabo]. The best time for gathering is the 7th day of the 7th month. The seeds are gathered in the 9th month. The seeds which have entered the soil are injurious to man. It grows on Mount Tai.