Järviruoko (Ryti)    Common reed 
– Phragmites australis – 

100–300 cm. Vedessä, rannoilla ja soilla. Yleinen. Tähkylät aluksi tumman sinipunaiset. VIII–IX.Lehdet leveät. Röyhy pitkä ja tuuhea. Tähkylät kapeat, suipot; karvat helpeitten tyvellä lopulta pitkät.

A tall reed up to 4m high above water level with an extensive rhizome system. Stems round and hollow. Leaves attached to stem by a smooth sheath with a fringe of hairs next to stem. Flowers borne on a very long, many branched infl orescence, purple in colour. Branches between fl orets bear long, white, silky hairs. Forms extensive stands on mud or in shallow water in marshes, fens, bogs, 
and the edges of shallow lakes, salt marshes and estuaries.