This refers to a type of aquatic plant that has sharp, spiny leaves and is typically found in freshwater environments. It is often used in aquatic ecosystems and can provide habitat for various aquatic life.

This meaning also describes the same aquatic plant, emphasizing its characteristics of spines and its place in the naiad family. Naiads are a type of freshwater plant that contribute to ecosystem health.

This term highlights the leaf shape of the plant, resembling holly leaves. It is often used in ecological contexts to discuss the plant's identity and role in nature.