IPM1007, Revised November 2009
An invasive perennial introduced to the United States from Japan as an ornamental that spreads by rhizomes and seed. Japanese bamboo now occurs as a weed of riverbanks, landscapes and occasionally no-till agronomic crops. Leaves are arranged alternately along the stem, are egg shaped in outline and about 4 to 6 inches long by 2-1/2 to 4-1/4 inches wide. Leaf bases are cut straight across. Stems are stout, hollow and jointed and resemble those of bamboo. A thin membranous sheath (ocrea) encircles the stem at each joint. Stems may reach as much as 13 feet in height. Flowers occur in clusters and are small and white.
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