Aira L. >
Spikelets 2–3 mm long, with 2 florets. Pedicels and branches thread-like and delicate Aira
Panicle open. Pedicels as long as or longer than the spikelets
Pedicels twice as long or longer than the spikelets
Spikelets 1–2.5 mm long, with one or 2 exserted awns. Pedicels 2–5 times as long as spikelets, without clavate swelling. Erect annual to 50 cm high. Blue Mts Introd. from Europe. Fl. summer Aira elegantissima