Aristida L.

Lemma with 3 awns or awn 3-branched Aristida
Column absent
Margins of lemma involute, producing a longitudinal furrow on the inner surface
Lateral awns shorter than the central one by more than 2 mm. Panicle 5–8 cm long. Tufted perennial up to 2 m high. Culms very branched. Widespread. DSF and heath. Sandy soils. Fl. summer Aristida calycinacalycina
Lateral awns shorter than the central one by up to 2 mm. Panicle 4–27 cm long. Compact tufted perennials up to 1 m high. Culms simple or sometimes branched at the base.