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.
Milk Thistle as a Nutritional Supplement for Birds Desi Milpac her. 1. The Benefits and Limitations of Milk Thistle as a Nutritional. Supplement for Birds. by Desi Milpacher. A member of the daisy family, the milk thistle, a waxy-lobed, thorny plant grows wild in Europe. and has spread easily to other parts of the world. The attractive purple-pink flowers bloom in. spring, drying out by the time summer comes.