Morphology

A rhizomatous, perennial grass with culms 20-150 cm tall and 2-4 mm thick. Sheaths glabrous, keeled. Ligules 5-15 mm. Blades 5-25 cm long, 3-10 mm wide, both surfaces smooth.

Panicles 10-50 cm long, 2-3 cm wide. Spikelets (15)18-39 mm long, 1.7-3.3 mm wide. Lower glumes 1.3-3.9 mm. Upper glumes 2.7-5 mm. Lemmas 5.2-8 mm. Anthers 1.5-3 mm.

Name/Synonymy Info

Glyceria fluitans (L.) R. Br., Prodr. 1:179 (1810). Festuca fluitans L., Sp. pl. 1:75 (1753); Poa fluitans (L.) Scop., Fl. carniol., ed. 2, 2:73 (1772); Hydrochloa fluitans (L.) Hartman, Gen. gram. 8 (1819); Melica fluitans (L.) Raspail, Ann. Sci. Nat. (Paris) 5:443 (1825); Panicularia fluitans (L.) Kuntze, Revisio gen. pl. 2:782 (1891). LEC: LINN 92.22; Europe [based on "Gramen aquaticum fluitans" of Bauhin] [Kit Tan in P.H. Davis, Flora of Turkey and the East Aegean Islands 9:537 (1985)].

Panicularia brachyphylla Nash, Bull. Torrey Bot. Club 24:349 (1897). TYPE: U.S.A., New York: open swamp near New York and Harlem Railroad just north of the northern line of the New York Botanical Garden grounds; G.V. Nash.

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References

M.E. Barkworth & L.K. Anderton. 2007. Glyceria in Flora of North America, volume 24. Oxford University Press.

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