[3] The specific epithet erectus is Latin, meaning "erect".

The flattened cauline leaves have pubescent or glabrous sheaths.

The grass lacks auricles and the ligule is blunt but finely serrated, sometimes with hairy edges.

The contracted and ellipsoid panicle is usually upright, rather than nodding, measuring 7–15 cm (2.8–5.9 in) long.

[4][5] Found on well-drained calcerous soils in disturbed areas, fields, and roadsides, B. erectus is widespread in Europe, South West Asia, North West Africa, and has been introduced into North America.