Plants annual. Culms 5-30 (55) cm, erect. Sheaths of the flag leaves not inflated; auricles not developed; ligules 5-7 mm, acute; blades to 19 cm long, 5-7 mm wide, flat or folded. Panicles 1-12 cm long, 3.5-7 mm wide, narrowly cylindrical, tapering somewhat distally. Glumes 1.5-2.5 mm, scabrous, inflated, keels sometimes slightly ciliate, margins ciliate distally, apices abruptly truncate, mucronate to awned, awns to 0.6 mm, lower glumes pilose on the margins; lemmas about 1/3 as long as the glumes, pubescent; anthers 0.3-0.5 mm. 2n = 28.
Phleum paniculatum is native to dry habitats in southern and south-central Europe. In the Flora region, it is known only from old ballast dump records.
"decumbent" is not a number.