Arrhenatherum, commonly called oat-grass or button-grass, is a genus of Eurasian and North African plants in the grass family.

Oat-grasses are very common perennials with yellowish roots.

The shining stems grow to a height of 1.80 m (6 ft),[8] but die off in winter.

The inflorescence is a panicle with two-flowered bisexual spikelets.

[9] numerous species now considered better placed in other genera Avenula Danthoniastrum Duthiea Helictochloa Helictotrichon Sphenopholis