Bromus tectorum

Downy brome ( Bromus tectorum ), left

The downy brome ( Bromus tectorum ) is a plant of the family Gramineae ( Poaceae ). It grows mainly in the fields and short-lived weeds corridors.

Description

The downy brome is an annual herbaceous plant. The deciduous Therophyt reaches stature heights between 10 and 60 centimeters and grow individually to loose Horstig. The leaves reach up to 20 cm long and 2 to 4 millimeters in width. The leaf blades are tapered pubescent and gradually. The rip ligule measure 3-5 millimeters. The sheaths are tubular, closed on the ventral side and also soft hairy. The stalks are hairy only directly under the fluffy inflorescence.

The inflorescence is a contracted more or less nodding, single overhanging panicle. The hairy panicle branches are alternately on opposite sides of the permanent four -edged stem of the blossom and bear 4-12 spikelets. These are four-to neunblütig and between 25 and 35 millimeters long. The egg-shaped to oblong, rounded on the back lemmas have two teeth. The awn arises below the bay, which is formed by these teeth. The rough awn is 10-18 mm long.

The flowering period extends from May to July.

Distribution and location

The distribution of downy brome originally comprised the whole of Europe and the Mediterranean to North Africa to the Middle East. The species was introduced to North America, South America, South Africa, New Zealand, Australia and Hawaii and is naturalized almost everywhere today.

The grass grows on dry, warm, moderately nutrient-rich soils, often in premolars Ruderalfluren as a pioneer.

Taxonomy

The downy brome was first published in 1753 by Carl Linnaeus in Species Plantarum. Together with the similar types downy brome is often separated from the genus Bromus tectorum and is then called Anisantha (L.) Nevski.