Grass Family (Poaceae). Common reed is a warm season, rhizomatous, stoloniferous perennial, native to the U.S. The height ranges from 6 to 12 feet. The leaf blade is flat; smooth; 1/2 to 2 inches wide; and 6 to 18 inches long. The seedhead is an open panicle with a purplish or tawny and flaglike appearance after seed shatter. Common reed is readily identified by its height. It is the tallest grass in southern marshes and swamps.
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