Phalaris has annual and perennial species. The flowers are clustered into a more or less cylindrical cluster. The glumes are strongly keeled. The lemmas are similar in appearance . All lemmas may produce seed, or only one per spikelet.
Phalaris (*Phalaris aquatica)
Lesser Canary-grass (*Phalaris minor)
Paradoxical Canary-grass (*Phalaris paradoxa)