Definition:
"Southern spatterdock" is a type of plant that grows in the flowing waters of the southeastern United States. It is known for its broad leaves and yellow flowers. This plant can sometimes form thick mats that may block the flow of water in streams and rivers.
While "southern spatterdock" specifically refers to this plant, "spatterdock" in general can refer to other similar aquatic plants.
Though there are no specific idioms or phrasal verbs related to "southern spatterdock," you can use phrases related to water plants, such as:
The southern spatterdock is a plant found in southeastern U.S. waterways, known for its large leaves and flowers, and it can impact the flow of these waters by forming dense mats.