Cattail, e.g. is a crossword solution for the term REED (4 letters). Cattail is a common name for any of the tall, perennial, marsh plants of the genus Typha, which are found in temperate and tropical regions around the world. These plants have long, slender leaves and a dense cluster of brown, cylindrical flower heads at the top of the stem. They are often used in landscaping and are an important food source for many species of wildlife.