Reitgräser (Calamagrostis) are a genus of the family of grasses (Poaceae).
The Reitgräser are perennial, horst-forming grasses. The plants often form underground runners. The number of renewal shoots grow inside or outside the lower leaf sheaths (intra-or extravaginal) high. The stems are simple or branched at the lower nodes and have more than one node.
The leaf sheaths are open to the bottom, fluted, sometimes hairy, smooth or rough. The ligule is a skinned hem. The leaf blades are long and 1.5 to 12 mm wide. They are flat, ribbed. On the ribs, they are rough, bare to hairy. The leaf edge is rough and often cutting.
The inflorescence is a panicle. It is richly branched, mostly erect, and only spread to blossom. The spikelets consist of a hermaphroditic florets and are 3-8 mm long, slender and laterally compressed. The florets bearing at the base of the lemma long hair which is usually the same length as or longer than the lemma.
The flower comes to fruit maturation as a whole from the glumes. The Ährchenachse carries at the edges long white hair. The two glumes are one-to dreinervig and as long as the spikelet. You are pointed to acuminate, membranous and unequal, with the lower one is longer than the upper.
The lemma is three or fünfnervig and half to three quarters as long as the glumes. It is pointed or has two short lateral lobes, is frequently, bald and wears a awn. This usually sits on his back the husks, rarely between the side lobes or the tip.
The palea has two nerves, is to the same length as the lemma, zarthäutig and bare. There are three stamens. The ovary is bald and wears two terminal stylus with short, feathery stigmas. The caryopsis is bare. The umbilicus is long and takes up to a quarter of the fruit length.