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Phalaris
See list of 2 species in this genus-
1a. Plants perennial, with creeping rhizomes; keel of glumes not winged; panicle mostly 7–25 cm tall, some branching visible; glumes 4–6.5 mm long; sterile lemmas 1–2 mm long
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1b. Plants annual, without rhizomes; keel of glumes winged [Fig. 250]; panicle 1.5–4 cm tall, very dense; glumes 7–10 mm long; sterile lemmas 2.5–4.5 mm long
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Each photo represents one species in this genus.