Dark Green Bulrush
Plants of the Eloise Butler Wildflower Garden

Common
Name

Scientific
Name

Plant
Family

Garden
Location

Prime
Season

Green Bulrush
Scirpus atrovirens Willd.
Sedge (Cyperaceae)
Woodland - Bog
Early Summer to Autumn
Other names and notes
(Dark-green Bulrush). Green Bulrush is a perennial sedge, growing up to 5 feet high on roundly triangular stems from fibrous roots. Leaves are 1/3 to almost 1" broad (1-2cm) with a slight "M" shape. There are up to 10 leaves per stem. The leaf sheath can be green or brownish. The inflorescence is terminal and contains several spherical heads containing numerous spikelets. These heads angle out in different directions and under the inflorescence are two or more very conspicuous bracts (modified leaves). The plant is found in sedge meadows, alder thickets and wet meadows. As the seeds are viable for up to 40 years, it frequently can colonize a disturbed site such as a site recently dredged or otherwise mitigated.
Dark Green Bulrush
Dark Green Bulrush Drawing
Above and below: Typical dense spherical seed heads containing the spikelets.
Above: Drawing of Green Bulrush ©USDA-NRCS PLANTS Database / USDA NRCS. Wetland flora: Field office illustrated guide to plant species. USDA Natural Resources Conservation Service.
Dark Green Bulrush plant
Dark Green Bulrush seed head
Dark Green Bulrush leaf sheath
 
 
Notes: Green Bulrush is native to a good part of the U.S., excluding only 7 states in the SW and Florida. It is found in Canada from Manitoba eastward. Within Minnesota, it is found throughout the state with only 14 widely scattered counties not reporting it. It is indigenous to the Garden area.  
 

 
References: Plant characteristics are generally from sources 15, 16, 30, 31, 33, W2 & W3. Distribution principally from W2 and also 31, 34 and W1. Planting history generally from 1, 4 & 4a. Other sources by specific reference. See Reference List for details.  
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