Quillwort (Isoetes) is a fascinating aquatic plant that represents one of Earth's oldest plant lineages, often called a "living fossil." These unique plants produce rosettes of thin, quill-like leaves that emerge from a central crown, creating striking geometric patterns. Native to wetlands and shallow waters worldwide, Quillworts have adapted beautifully to terrarium culture, where their distinctive texture and form create captivating focal points. Their ability to thrive in high-humidity environments makes them perfect for enclosed glass ecosystems and specialized water gardens.