Drainage basin: The area drained by a river and its tributaries. A drainage basin is considered to be an open system because water can be added or lost from a drainage basin. Source: The beginning of a river. A river may have multiple sources.
Milk thistle (Silybum marianum) is a thorny plant presenting decorative leaves with a white pattern of veins and purple flower heads. The plant originates from mountains of the Mediterranean region, where it forms scrub on a rocky base.
Historical evidence shows that milk thistle was used extensively as far back as 2000 years ago, though it really came into its own in Germany in the 1960s with the seeds being used to cure jaundice, hepatitis, haemorrhoids, liver problems and the depression and melancholy which can be associated with them.