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General: Sedges (Cyperaceae) are grass-like plants that mostly grow in wetlands and usually
grow knee-high to head-high, with stems that tend to be 3-sided and
with leaves that occur in whorls of three. Several species of Sedge
occur around Las Vegas, and while some can be recognized, it is
sufficient for the casual observer to recognize Sedges in contrast to
Grasses (e.g., Stipa and Poa spp.) and Rushes (e.g., Juncus spp.):
Sedge stems have edges,
Rush stems are round,
And Grasses have leaves all the way to the ground. |
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Sedges mostly occur in wetlands, along washes and rivers, and in other wet areas in the Lower Sonoran
(Creosote-Bursage Flats), Upper Sonoran
(Mojave Desert Scrub and
Pinyon-Juniper Woodland), and Transition
(Yellow Pine Forest) life zones. However, they also occur in dry
situations at higher elevations, including the Canadian (Pine-Fir Forest), Hudsonian
(Bristlecone Forest), and even the Arctic
(Alpine Tundra) life zones.
Around Las Vegas, look for sedges in desert canyons, mountain meadows, and around wetlands and ponds such as the
Henderson Ponds, the
Wetlands Preserve, and
Floyd Lamb County Park. |
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Family: Sedge (Cyperaceae).
Other Names: Bulrush, tule.
Plant Form: Grass-like.
Height: To 6-feet.
Stems: Erect, 3-sided (at least near the tip of the stem or near the inflorescence), solid. |
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Leaves: Blades long and narrow (like tall grass), generally emerging from near the base of the stem.
Flowers: Inflorescence is a panicle. Individual flowers small.
Seeds: Small, oval or 3-sided seed.
Habitat: At lower elevations: pond edges, stream edges, riverbanks, and other wet areas. At higher elevations, found in many
habitats, including the summits of the highest peaks. |
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Elevation: From springs on the desert floor to the tops of the highest peaks (12,000 feet in southern Nevada).
Distribution: Worldwide.
Comments: There are some 110 genera and 3,600 species in the Sedge family, with some 200 species in genus Scirpus alone. They
mostly all look alike, although some specialists can tell them apart by details of the inflorescence and seeds. For casual observers,
it is sufficient to recognize Sedges in contrast to Grasses and Rushes: Sedges have edges, Rushes are round, and Grasses have leaves
all the way to the ground. |
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Sedge stems are triangular in cross-section. |
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Sedge flowers cluster at the tip of the stems. |
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While most species of sedges grow tall, some a short and might carpet the ground in damp areas similar to lawn grasses. |
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Flowers and seeds on a low-growing species of sedge. |
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In this species, the flowerhead grows from near the tip of the stem, and the individual flowers hang down. |
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Sedge flowers. |
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As in all species of sedge, the stem is triangular at least at the tip. |
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