Puccinellia filifolia (Trin.) Tzvelev

Perennial, densely tufted, tillers very numerous. Culms erect, 20–30 cm tall, 0.7–1.5 mm in diam. Ligule 0.6–2 mm; leaf blades conduplicate, setaceous, 2–5 cm, 0.3–1 mm wide. Panicle spreading, 3–8 cm; branches 2 or 3 per node, 2–6 cm, thin, smooth. Spikelets 2.5–4 mm, usually tinged with purple; florets 2–4; glumes obtuse, lower glume 0.5–1 mm, upper glume 1–1.5 mm; lemmas 1.6–2 mm, glabrous or subglabrous; palea keels smooth; anthers 0.9–1.1 mm. Fl. May–Jun.