Phragmites australis is a tall wetland grass that commonly reaches around 3.6 m. It thrives in full sun on sandy, loamy or clay soils where moisture is high or standing water occurs. Flowering occurs July to September, producing dense panicles that age to a greyer tone. It has a wide native range across Europe, Asia, Africa, Australia and North America.

Common reed Phragmites australis is a tall wetland grass flowering July to September and suited to full sun and moist or wet soils.

https://en.wikipedia.org/wiki/Phragmites_australis

Phragmites is a genus of four species of large perennial reed grasses found in wetlands throughout temperate and tropical regions of the world.

Phragmites australis

Common Reed (Phragmites australis) | Wetland Reed

Phragmites communis 'Variegata' is a tall reed grass cultivar distinguished by variegated foliage and imposing height. It reaches about 6.1 metres and produces plume-like flowerheads from July to September. Plant it in full sun or partial shade on consistently wet or moist soils. Suited to ornamental margins, water gardens and wetland restoration.

Variegated Common Reed (Phragmites communis 'Variegata') for ponds and wetlands; a tall reed to 6.1 metres that flowers July to September.

Phragmites communis 'Variegata'

Variegated Common Reed (Phragmites communis 'Variegata')

Phragmites macer is a grass in the genus Phragmites that produces its flowering stems from July to September. The species belongs to the grass group used for structural summer flowerheads. Flowers appear on stems above the foliage and persist through late summer. Use seasonal flowering to plan positioning where stems will be visible at eye level or taller beds.

Phragmites macer is a grass that flowers from July to September and provides summer flowering stems for borders and groups.

https://en.wikipedia.org/wiki/Hakonechloa

Hakonechloa is a genus of bunchgrass in the tribe Molinieae of the grass family, Poaceae, native to eastern Asia.