Arundo donax L.

Giant Reed

Natural range: Old World

Habitat: Ditches

Florida status: Introduced. Giant weed

Recognition: Giant ditch-dwelling reed having broad, very strongly auriculate leaves. The basal regions/auricles are white or tan. Auricles reach around the stem. The leaves inserted evenly along the stem like the steps of a ladder. The inflorescence is a large flame-shaped panicle.

Hymenachne is also very large with conspicuous clasping auricles.