Morphology

A rhizomatous, perennial grass with culms 60-100 cm tall and 1.5-5 mm thick. Sheaths glabrous, keeled. Ligules 4-12 mm. Blades 9-25 cm long, 2-7 mm wide, abaxial surfaces smooth, adaxial surfaces of the midcauline leaves densely papillose, glabrous.

Panicles 18-40(50) cm long and 0.5-2(5) cm wide. Branches 5-10(15) cm, usually 1-3(5) per node. Spikelets 9-22 mm long and 0.8-2.5 mm wide, with 8-12 florets. Lower glumes 1.2-2.2 mm. Upper glumes 2-3.8 mm. Lemmas 2.7-5.4 mm. Paleas usually shorter than or equaling the lemmas, sometimes exceeding them by up to 0.5 mm. Anthers 3, 0.4-1.5 mm.

Name/Synonymy Info

Glyceria borealis (Nash) Batch., Proc. Manchester Inst. Arts Sci. 1:74 (1900) [title page 1899]. Panicularia borealis Nash, Bull. Torrey Bot. Club 24:348 (1897). Glyceria fluitans var. angustata Vasey ex Fernald, Proc. Portland Soc. Nat. Hist. 2:91 (1895). TYPE: U.S.A., Maine: along St. John River, Violette Brook, Van Buren; 25 Jul 1893; M.L. Fernald 193.

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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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