C11. Papyrus

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This tall, robust, leafless aquatic plant can grow 4 to 5 m (13 to 16 ft) high.  It forms a grass-like clump of triangular green stems that rise up from thick, woody rhizomes.  

Each stem is topped by a dense cluster of thin, bright green, thread-like stems around 10 to 30 cm (4 to 10 in) in length, resembling a feather duster when the plant is young.  Greenish-brown flower clusters eventually appear at the ends of the rays, giving way to brown, nut-like fruits.