Aira L. >

Spikelets 2–3 mm long, with 2 florets. Pedicels and branches thread-like and delicate Aira
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Panicle open. Pedicels as long as or longer than the spikelets
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Pedicels up to twice as long as spikelets
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Spikelets 2.5–3 mm long, mostly with 2 exserted awns but sometimes only 1. Glumes acute. Erect annual up to 30 cm high. Widespread. Grasslands; roadsides. Introd. from Europe. Fl. summer. Silvery Hair Grass Aira caryophyllea