Puccinellia gigantea Grossheim.

Caespitose perennial. Culms erect, sparsely branching intravaginally, 44–80 cm high. Leaves: ligule 3–4 mm long; blade involute and folded towards apex, 6.5–16 cm long, 0.8–1 mm wide. Inflorescence spreading at anthesis, well exserted above flag leaf, 15–19 cm long; lateral branches scabridulous; primary branches undivided at least 1–2 mm, up to 15–25 mm; maximum total branch length 35–80 mm. Spikelets 7–10 mm long; bisexual florets 6–11. Lower glume 0.8–1.2 mm long; upper glume 1.5–2 mm long. Callus pubescent. Lemma 2.2–2.8 mm long, glabrous or puberulous towards base; veins prominent. Palea 2.5–2.9 mm long; keels scabrous to ciliate in lower half. Anthers 1.2–1.6 mm long, creamy white sometimes tinged purple.