Hymenachne amplexicaulis, commonly known as West Indian Marsh Grass, is an evergreen perennial grass native to tropical wetlands throughout Mexico, Central and South America and the Caribbean. It can reach heights of 7-9 feet and widths of 5-6 feet. This species typically forms dense stands with stout stems and broad leaves that clasp the stem, giving it a robust appearance. The inflorescence is a panicle, often reaching up to half a meter in length, with multiple panicles sometimes observed branching from a single node. Hymenachne amplexicaulis is notable for its prolific seed production, with thousands of seeds per plant that exhibit high germination rates, often up to 98% directly from the panicle.

West Indian Marsh Grass thrives in wet conditions and is often found in standing water, making it suitable for water gardens and naturalized wetland areas. It is valued for its ability to stabilize soil and provide habitat for wildlife, but care should be taken due to its invasive potential outside its native range. In cultivation, it requires full sun, high or aquatic water levels, and soils with slow or standing drainage. While it can be a useful plant for specific purposes, it is not recommended for general garden use due to its aggressive growth and potential to become invasive. Gardeners should consult local regulations before planting to prevent ecological disruption.CC BY-SA 4.0