''Scirpus atrovirens'', known as dark-green bulrush, is a perennial

sedge The Cyperaceae are a family of graminoid (grass-like), monocotyledonous flowering plants known as sedges. The family is large, with some 5,500 known species described in about 90 genera, the largest being the "true sedges" genus ''Carex'' wit ...

native to wetlands of eastern Canada and the United States. It is sometimes called dark green bulsedge, black bulrush, or green bulrush. It was first formally named by

Carl Ludwig Willdenow Carl Ludwig Willdenow (22 August 1765 – 10 July 1812) was a German botanist, pharmacist, and plant taxonomist. He is considered one of the founders of phytogeography, the study of the geographic distribution of plants. Willdenow was als ...

in 1809. ''Scirpus atrovirens'' grows in a wide variety of wetland habitats, typically in sunny areas rather than shady. It can be found in wet meadows and shrubby thickets, openings in swamps, marshes, shorelines, as well as roadside ditches. The plant can grow up to five feet tall, and thrives in

hardiness zones A hardiness zone is a geographic area defined as having a certain average annual minimum temperature, a factor relevant to the survival of many plants. In some systems other statistics are included in the calculations. The original and most wide ...

3–9. It is closely related to ''

Scirpus hattorianus ''Scirpus'' is a genus of grass-like species in the sedge family Cyperaceae many with the common names club-rush, wood club-rush or bulrush (see also bulrush for other plant genera so-named). They mostly inhabit wetlands and damp locations. Taxo ...

'' and ''

Scirpus georgianus ''Scirpus georgianus'', or Georgia bulrush, is a flowering plant Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (), commonly called angiosperms. The term "angiosperm" is derived from the Greek word ...

'', with mature fruits necessary for accurate identification.

References

atrovirens Flora of North America {{Cyperaceae-stub