Botanical name: Phragmites karka Family: Poaceae (Grass family)
Synonyms: Arundo karka, Arundo roxburghii, Phragmites roxburghii
Tall Reed is a perennial reed, with creeping rhizomes. Culms are erect, up to 10 m tall. Leaf-blades are 30-80 cm long and 1.2-4 cm wide, hairless, rough to touch beneath, the tips flat and stiff (occasionally almost smooth or with thread-like tips). Flowers are borne in panicles 30-50 cm long, 10-20 cm wide, the lowest node often many-branched in a whorl, brownish purple. Rhachilla, long, silky hairy above the lowest lemma. The branches bare of spikelets for some distance from their base. Spikelets are 9-12 mm long, the rhachilla-hairs 4-7 mm long, rather sparse; lower glume just over half as long as the upper; upper glume narrowly elliptic to very narrowly elliptic, 4-6 mm long, acute to subacute; lowest lemma very narrowly elliptic, 7.5-12 mm long; fertile lemmas very narrowly lanceolate, 85-11 mm long. Flowering: April-November.
Identification credit: R. Vijayasankar, Gurcharan Singh
The flower labeled Tall Reed is ...