Morphology

A rhizomatous, perennial grass with culms (10)20-92 cm tall and 1.5-2.5 mm thick. Sheaths glabrous, keeled. Ligules 4-9 mm. Blades(2)3-12 cm long, 4-8 mm wide, adaxial surfaces not papillose.

Panicles 6-30 cm long, 1-2.5 cm wide. Branches 1.5-9.5 cm long. Spikelets 11-24 mm long, 1.3-3 mm wide, with 8-15 florets. Lower glumes 1.4-3.5 mm. Upper glumes 2.5-4.9 mm. Lemmas (3.5)4-6 mm, 7-veined. Paleas exceeding the lemmas by 0.2-1(1.5) mm. Anthers 0.5-1.4 mm.

Name/Synonymy Info

Glyceria declinata Bréb., Fl. Normandie, ed. 3, 354 (1859). Glyceria plicata var. declinata (Bréb.) Druce, List. Brit. pl. 83 (1908); Glyceria plicata subsp. declinata (Bréb.) E.J. Weeda, Gorteria 11:214 (1983). TYPE: France: Briouze swamp (Orne) and Cinglais forest, near Moutiers (Calvados).

Glyceria cookei Swallen, J. Wash. Acad. Sci. 31:348, f. 1 (1941). HOL: US 2209348; U.S.A., California: wet place on alluvial gravel in box canyon of Sacramento River near Mount Shasta City, alt. 3000 feet; 12 Jul 1940; W.B. Cooke 15312.

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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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