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FutureStarrSlough Sedge or
Slough Sedge is a 5,000 acre wetland, one mile from the edge of the sea, on the southern coast of England. It’s a place to find rare nature. I think this is one of my favorite places in the world.Carex obnupta is a species of sedge known by the common name slough sedge. It is native to western North America from British Columbia to California where it grows crudsaline habitat such as wetlands. The plant produces upright, angled stems approaching 1.2 meters in maximum height, growing in beds or colonies from rhizome networks. The flower cluster is a cluster of flower spikes accompanied by a long leaflike leaf. The pistillate spikes and sometimes the staminate spikes dangle on peduncles. The fruit is coated by a hard, tough, shiny perigynium which is generally dark in color.
Slough sedge grows in dense tufts from long, creeping rhizomes. Its stiff stems are 60-150 cm tall and sheathed with shorter leaves. The leaves can be up to 1 cm wide, and have rolled edges. One to three male inflorescences grow at or near the end of the stem. The lower 2-4 spikes are female (bottom left photo), and either do not grow on stalks or droop down from short, upright stalks. The bract around the lowest spike(s) looks like a leaf, and is longer than the spikes. The yellow-green or brown perigynia (sacs covering reproductive parts and fruit) are shiny and plump.This perennial sedge is 2ï¿½–3ï¿½' tall; infertile shoots are more common than fertile shoots. The erect culms (central stems) are unbranched, glabrous, light green, and triangular in cross-section; infertile shoots have shorter culms than fertile shoots.
On infertile shoots, there are 6-12 alternate leaves that ascend the entire length of each culm; on fertile shoots, there are 3-5 alternate leaves that are found along the lower half of each culm.For both kinds of shoots, the leaf blades are light to medium green, glabrous, shallowly channeled along their central veins, and rough-textured along their margins. On infertile shoots, the blades are up to 25" long and 6 mm. across; they are very long and whip-like. On fertile shoots, the blades are up to 14" long and 6 mm. across; they are substantially shorter than the blades of infertile shoots. Generally, each blade is recurved – ascending at the base, arching near the middle, and descending toward the tip. The leaf sheaths are light green, glabrous, and longitudinally veined; they often become loose toward the bottom of each culm, where a netting of fine veins may persist. Each ligule is short-membranous, forming a blunt upside-down "V" shape on the culm. (Source:www.illinoiswildflowers.info)