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Alopecurus
See list of 5 species in this genusA genus sometimes confused with Phleum. In addition to unawned glumes and awned lemmas, Alopecurus has appressed-ascending spikelets. Phleum, on the other hand, has awned glumes, unawned lemmas, and spreading to reflexed spikelets (except for the apical ones, which are ascending). Reference: Crins (2007).
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1a. Glumes 4–6 mm long, acute to acuminate and firm at the apex [Fig. 185]; anthers 2.2–3.5 mm long
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2a. Glumes connate at the base for up to 25% of their length, ciliate on the keel with long hairs [Fig. 185], the hairs on the apical half of the keel 1–1.5 mm long
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2b. Glumes connate at the base for 35–50% of their length, short-ciliate on the basal half of the keel, scabrous on the apical half
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1b. Glumes 2–3.2 mm long, blunt and scarious at the apex [Fig. 184]; anthers 0.5–2 mm long
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3a. Plants perennial, with decumbent-based stems that usually root at the lower nodes; glumes 2.6–3 mm long; anthers 1.3–2 mm long; inflorescence 4–6 mm thick
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3b. Plants annual or short-lived perennial, erect or decumbent at base, usually not rooting from the lower nodes; glumes 2–2.7 mm long; anthers 0.3–1 mm long; inflorescence 3–5 mm thick
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4a. Awn inserted on the lemma just below the midpoint, straight, equaling the glumes or exserted from the spikelet up to 0.5 (–1) mm [Fig. 184]
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4b. Awn inserted on the lemma halfway between the midpoint and base, geniculate, exserted from the spikelet 1.5–3 mm
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Each photo represents one species in this genus.