Plante aquatique dont la tige, très lisse et très droite, est d'ordinaire creuse et remplie de moelle.
Tall woody perennial grasses with hollow slender stems especially of the genera Arundo and Phragmites.
Any of various perennial tall, slender grasses of wet or marshy environments; in particular, species of the genera Phragmites and Arundo; also the stalk of any of these plants. The common reed p. australis attains a height of 3 m/10 ft, having stiff, erect leaves and straight stems bearing a plume of purplish flowers.