A stout, erect, hairless plant 50 to 150 cm tall with broad (to 18 mm) glossy green leaves. The leaf auricles are reddish-purple and clasp the stem. Panicle is very loose and drooping, with long rough branches occurring singly or in pairs. Spikelets 10 to 15 cm long.
Habitat: woods and well shaded places. When to see it: June to August.
This plant is useful.