Lachnagrostis Trin.
Palea more than half the length of the lemma. Lemma usually hairy and awned Lachnagrostis
Pedicels of the spikelet usually diverging from the rhachis, some pedicels c. 1 cm long. Spikelets c. 5 mm long, tinged with purple. Lemma 2–3 mm long, awned from c. the middle. Erect annual up to 60 cm high. Culms 2–4-noded. Leaf blades 8–20 cm long, mostly 3–4 mm wide. Panicle spreading. Widespread. Usually in damp places. Fl. summer. Blown Grass Lachnagrostis aemula
Pedicel of spikelets usually close to the rhachis, less than 5 mm long. Spikelets 2–4 mm long, usually light green or straw-coloured sometimes tinged with purple. Lemma 2 mm long or less. Erect annual up to 70 cm high. Culms 4-noded. Leaf blades 8–25 cm long, usually c. 2 mm wide. Panicle spreading. Widespread. Usually in damp places. Fl. summer. Blown Grass Lachnagrostis filiformis