| reed mannagrass |
USDA PLANTS Symbol: GLMA3 USDA ARS GRIN: 17680 ITIS: 40846 |
| Glyceria maxima (Hartman) Holmb. | |
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Taxonomic Rank: Liliopsida: Cyperales: Poaceae |
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States Listed: Washington, |
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Reed mannagrass is a perennial, semi-aquatic, rhizomatous grass. Stems are unbranched and can reach 2-8.2 ft. (0.6-2.5 m) in height. Leaves are 12-23.6 in. (30-60 cm) long, 0.2-0.8 in. (6-20 mm) wide, with an acute apex and a prominent midrib. Flowering occurs in June-August, when flowers appear in 6-12 in. (15-30 cm) long panicles. This plant reproduces primarily vegetatively and occurs in sunny to semi-shady wetlands, where it can form dense impenetrable stands. Reed mannagrass is native to northern Eurasia and was first found in North America in 1940 on the edge of Lake Ontario. |
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Identification, Biology, Control and Management Resources
| Selected Images from Invasive.org | View All Images at Invasive.org |
 Flower(s); Leslie J. Mehrhoff, University of Connecticut, Bugwood.org Additional Resolutions & Image Usage |
 Plant(s); Leslie J. Mehrhoff, University of Connecticut, Bugwood.org Additional Resolutions & Image Usage |
 Plant(s); habitat; Alnus glutinosa; Glycerietum maximae; Robert Vidéki, Doronicum Kft., Bugwood.org Additional Resolutions & Image Usage |
 Plant(s); Salix cinerea; Glycerietum maximae; Calamagrosti-Salicetum cinereae; Lemna minor Robert Vidéki, Doronicum Kft., Bugwood.org Additional Resolutions & Image Usage |
| Distribution Map |
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Developed by The University of Georgia - Center for Invasive Species and Ecosystem Health. Last updated on Thursday, February 14, 2013 at 02:47 PM |
