Morphology

A rhizomatous, perennial grass with culms 60-250 cm tall and 6-12 mm thick. Sheaths scabridulous, keeled. Ligules 1.2-6 mm. Blades 30-60 cm long, 6-20 mm wide.

Panicles 15-45 cm long, to 30 cm wide. Branches 8-20 cm long. Spikelets 5-12 mm long, 2-3.5 mm wide, with 4-10 florets. Lower glumes 2-3 mm. Upper glumes 3-4 mm. Lemmas 3-4 mm, 7-veined. Paleas subequal to the lemmas. Anthers 3, (1)1.2-2 mm.

Name/Synonymy Info

Glyceria maxima (Hartman) Holmb., Bot. Not. 1919:97 (1919). Molinia maxima Hartman, Handb. Skand. fl. 56 (1820). TYPE: Sweden: Stockholm.

Poa aquatica L., Sp. pl. 1:67 (1753); Glyceria aquatica (L.) Wahlb., Fl. gothob. 1:18 (1820), non (L.) J. Presl & C. Presl (1819). Poa altissima Gilib, Exerc. phyt. 2:529 (1792); Glyceria altissima (Gilib.) Garcke, Fl. Deutschland, ed. 16, 500 (1890). Glyceria spectabilis Mert. & W.D.J. Koch in Röhl., Deutschl. fl., ed. 3, 1:586 (1823). LEC: LINN 87.1; Europe [Cope in Cafferty, C.E. Jarvis & Turland, Taxon 49:255 (2000)].

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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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