Author
Justin Bosler
Common Name(s)
Northern Glyceria,
Electronic links
GrassBase - The Online World Grass Flora species treatment as Glyceria arkansana http://www.kew.org/data/grasses-db/www/imp05085.htm
USDA PLANTS Database as Glyceria arkansana http://plants.usda.gov/java/profile?symbol=GLAR
Grass Manual on the Web,
Ecology
Glyceria are perennials that commonly grow in aquatic or semiaquatic areas of the Northern Hemisphere. They are rarely sufficiently abundant to be important forage species.
Family
Poaceae (Gramineae) grass family
Flowering period
April through June.
Fruit
Caryopsis red, linear to oblong at maturity, 1.5-2 mm long, 0.5-0.9 mm wide. Hila about as long as the caryopses.
Geographic distribution
Eastward from eastern
Inflorescences
Panicles 15–60 cm long, 1–3.5 cm wide; branches 3–17 cm, usually erect to strongly ascending, sometimes spreading at anthesis, usually straight, with 1–9 spikelets; pedicels 0.7–1.7 mm.
Leaves
Blades cauline and flat ranging betwen 18-32 cm long, 2-15 mm wide. Adaxially surface glabrous, while abaxial surface is normally scabrous.
Sheaths are closed and tightly wrapped around culm.
Ligules on adaxially side of leaf sheath are membranous, 5-16 mm.
Leaf collar evident.
Plant and Stem Features
Plants perennial. Culm erect, usually 70-180 cm tall, about 8 mm thick with conspicuous nodes. Panicles 15–60 cm long, 1–3.5 cm wide; branches 3–17 cm, usually erect to strongly ascending, sometimes spreading at anthesis, usually straight, with 1–9 spikelets; pedicels 0.7–1.7 mm.
References
Allen, Charles M. 1992. Grasses of
Barkworth, M. E. and L. K. Anderton. 2007. Glyceria R. Br. In: Flora
Clayton, W.D., Harman, K.T. and Williamson, H. (2006 onwards). GrassBase - The Online World Grass Flora. http://www.kew.org/data/grasses-db.html. [accessed 08 November 2006; 15:30 GMT]
Species name and place of publication
Glyceria septentrionalis Hitchcock, Rhodora 8: 211, 1906.
Spikelets
Spikelets mostly10–23 mm long, 1–3 mm wide, cylindrical and terete or slightly laterally compressed at anthesis, rectangular in side view,
Florets 8–16. Glumes elliptic to obovate, apices rounded to acute; lower glumes 1.5–3.7 mm; upper glumes 1.9–5.2 mm; rachilla internodes 1.1–1.8 mm; lemmas 2.4–4.8 mm, veins scabrous or hispidulous, intercostal region scabridulous, scabrous, or hispidulous, midveins extending to within 0.1 mm of the apical margins, apices truncate to obtuse or acute, apical margins crenate to entire; paleas from slightly shorter than to exceeding the lemmas, apices bifid, teeth to 0.2 mm; anthers 3, 0.5–1.8 mm.
Synonyms
Glyceria arkansana Fern., Arkansas mannagrass, is regarded as Glyceria septentrionalis var. arkansana (Fernald) Steyerm. & Kucera in Barkworth, M. E. and L. K. Anderton. 2007. Glyceria R. Br. In: Flora
Wetland Indicator Status
OBL