Cyperus niger is a species of sedge known by the common name black flatsedge. This plant is native to the Americas, where it can be found in wet areas from South and Central America to the southwestern United States, from California and Oklahoma south to Argentina.
Eleocharis atropurpurea is a species of spikesedge known by the common name purple spikerush. This is an aquatic plant native to much of. It also has a wide distribution in temperate regions of North and South America and Asia. It is present in Europe, where it may be an introduced species for the most part.
Carex alma is a species of sedge known by the common name sturdy sedge. It is native to the southwestern United States and northern Mexico, where it grows in moist spots in a number of habitat types. This sedge forms a thick clump of thin stems up to 90 centimeters in length and long, thready leaves. The leaves have basal sheaths with conspicuous red coloration, often spotting. The inflorescence is a dense to open cluster of many spikelets occurring both at the ends of stems and at nodes. Each cluster is up to 15 centimeters long and 1 to 2 wide. The plant is sometimes dioecious, with an individual sedge bearing either male or female flowers. The female, pistillate flowers have white or white-edged bracts. The male, staminate flowers have visible anthers 2 millimeters long or longer. The fruit is coated in a sac called a perigynium which is gold to dark brown in color and has a characteristic bit of spongy tissue at the base.
Carex amplifolia is a species of sedge known by the common name bigleaf sedge. It is native to western North America from British Columbia to Montana to California, where it grows in wet and seasonally wet areas in coniferous forests.
Carex angustata is a species of sedge known by the common name widefruit sedge. It is native to the western United States from Washington and Idaho to California, where it grows in wet meadows and on streambanks.
Carex atherodes is a species of sedge known by the common name wheat sedge. It is native to Eurasia and much of North America including most of Canada and the United States. It is a very common wetland plant across the American Midwest and areas west. It grows in moist and wet habitat, such as marshes and moist prairie land, and it may grow in shallow water. This sedge produces triangular, hollow stems 30 to 120 centimeters tall. The leaves are hairy, especially on the lower parts, and the leaf sheath is tinted with reddish purple. The inflorescence is up to 60 centimeters long and made up of several spikes; those spikes near the tip are usually staminate, and those lower in the inflorescence are usually pistillate. The tip of each fruit has two or more long, thin teeth.
Carex concinnoides is a species of sedge known by the common name northwestern sedge. It is native to western North America from British Columbia to California, where it can be found in moist or dry habitat, often in woodland and forested slopes, on silty and clay soils. This sedge produces loose clumps of stems up to about 35 centimeters in maximum height from long rhizomes. The leaves are thick but narrow, sickle-shaped, and pale green in color. Inflorescences occur at the stem tips, and some pistillate inflorescences grow from nodes along the stem. The spikelets have purplish bracts. The pistillate flowers have four stigmas on each pistil, an identifying characteristic. The fruit is coated in a sac called a perigynium, which is white to light brown in color, purple-tipped, and covered in hairs.
Carex leporinella is a species of sedge known by the common name Sierra hare sedge.
Carex pansa is a species of sedge known by the common name sand dune sedge. It is native to coast of western North America from British Columbia to California, where it grows in dunes and other sandy habitat. This grasslike sedge produces sharply triangular stems up to about 40 centimeters tall from a network of thin, long, coarse rhizomes. The inflorescence is a cluster of several spikes of dark brownish flowers. The plant sometimes produces only male or female flowers in its inflorescences, but not both. This sedge is sometimes used as a grass substitute in local landscaping schemes.
Carex pellita is a species of sedge known by the common name woolly sedge.
Carex petasata is a species of sedge known by the common name Liddon sedge.
Carex phaeocephala is a species of sedge known by the common name dunhead sedge.
Carex raynoldsii is a species of sedge known by the common name Raynolds' sedge. It is native to western North America and grows in alpine to subalpine meadows.
Carex scoparia is a species of sedge known by the common names broom sedge and pointed broom sedge. It should not be confused with the unrelated grass species known as "broom sedge," Andropogon virginicus.
Carex spissa is a species of sedge known by the common name San Diego sedge. It is native to the southwestern United States in California, Arizona, and New Mexico, and far northern Mexico. It grows in wet places such as seeps and streambanks, sometimes on serpentine soils. This sedge looks somewhat like a cattail. It produces angled stems easily exceeding a meter in height surrounded by leathery green to reddish leaves up to about 1.2 meters long. The inflorescence is up to 80 centimeters long, with many long reddish brown flower spikes, each holding up to 300 developing fruits.
Carex straminiformis is a species of sedge known by the common name Shasta sedge.
Scirpus cyperinus, commonly known as woolgrass, is a herbaceous emergent that is native to the eastern United States and eastern Canada. Other common names include cottongrass bulrush and brown woolly sedge.
Trichophorum clementis is a species of flowering plant in the sedge family known by the common name Yosemite bulrush. It is endemic to the Sierra Nevada of California, where it is known from high-elevation mountain meadows and streambanks.
Carex concinna is a species of sedge known by the common names low northern sedge, northern elegant sedge, beauty sedge, and beautiful sedge. It is native to northern North America, where it occurs across Canada and in high elevations in the northern contiguous United States.
Eriophorum viridicarinatum is a species of sedge known by the common names thinleaf cottonsedge, green-keeled cottongrass, and bog cottongrass. It is native to northern North America, where it occurs in Alaska and throughout much of Canada, its range extending into the northern contiguous United States. Its distribution is more patchy in the west but it is widespread in eastern Canada.
