Grass fruits are seeds, and are covered by two papery scales. Sedges produce only floral stems, and their wind-pollinated flowers tend to be inconspicuous. Sedge fruits are nutlets, and are enfolded by a single scale.
Examples of sedge flower stalks, Carex pensylvanica and Carex plantaginea. Grasses grow in ever-increasing tufts; the new shoots they send out are called tillers. The fibrous roots of grasses can measure 6 feet or more in depth, allowing them to absorb water and minerals and stabilizing both the plant and the soil. Sedges are clump-forming, and they spread laterally via rhizomes that are also useful in erosion control.
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Department of Agriculture cooperating. If you visit the Home Gardening Center any time from August into November, you will undoubtedly find the warm season ornamental grasses stealing the show with their billowy blooms. One that takes almost everyone by surprise is the pink muhly grass Muhlenbergia capillaris , with airy panicles that create a rich, pink haze.
For those looking to add to their gardens, the majority of ornamental grasses thrive in full sun and can handle drought magnificently. Wet summers are a different story, though, where staking is a requisite. Because of their beautiful flowering structures, ornamental grasses are by far the most popular for gardeners, though sedges hold a special place in the hearts of those who prefer shade gardening.
Most sedges tolerate shade better than grasses and—depending on the species—they handle a wide range of soils from wet to dry. Carex pensylvanica, sometimes referred to as Pennsylvania or oak sedge, is an ideal lawn substitute or ground cover for a shady spot.
It has a fine texture and a graceful fountain habit that spills over the ground. In our case, we had a bare, shady slope on the edge of the garden that was a breeding ground for weeds and washouts after every rainstorm. Two years ago we decided to cover the bank with small plugs of Carex, and it has since begun filling in nicely to provide a remedy to our problems. However, the arrangement of rush leaves varies among different species.
The leaf sheath of grasses, which is the part of the leaf that enfolds the stem, are typically open. The leaf sheaths of rushes and sedges are typically closed. Sedges and rushes typically have inconspicuous flowers in comparison to the showier flowers of grasses.
Most grass species have bisexual flowers, but they may have separate male and female flowers on the same plant. Sedges also have flowers that are bisexual, but they may also have unisexual flowers, which means there is only a male or female part in each flower.
Rushes typically produce bisexual flowers. The bract around the flower can look like a continuation of the stem, so flowers appear to stick out of the side of stems. Juncus effusus f. Join the RHS today and get 12 months for the price of 9. Skip to content [Accesskey '1'] Skip to navigation [Accesskey '2'].
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