Calamagrostis arundinacea is a species of bunch grass in the family Poaceae, native to Eurasia, China and India.[1] Under its synonym Calamagrostis brachytricha it has gained the Royal Horticultural Society's Award of Garden Merit.[2]
The species is perennial and tufted with short rhizomes and erect culms that are 60- long. Each leaf has a truncate ligule which is 2mm4mm long, and obtuse. The leaf-blades are 8– by 1.8–, hairless and have both a scabrous surface and an attenuate apex. The panicle has a scaberulous peduncle and is lanceolate, open, continuous, and is 8cm–18cmcm (03inches–07inchescm) long by 1– wide. Flowers have a pair of lodicules and stigmas, and three anthers which are 2.4– long. The fruit is a caryopsis with an additional pericarp.[1]