Movement, texture, and sound, the things flowers cannot give. Ornamental grasses and hardy bamboos catch the low light, sway with the least breeze, and hold the eye through winter when little else does, the quiet structural backbone of a planting.
Carex flaccosperma, the blue wood sedge, is a clump-forming native of the Southeastern woodlands grown for cool, glaucous, blue to blue-green foliage. The blades are wide for a sedge, to half an inch, faintly quilted along the veins, and they catch the light with a soft powdery sheen that lifts a shaded planting where most greens recede.
Among ornamental grasses, Chasmanthium latifolium is the rare one that thrives in shade. River oats, also called northern sea oats and inland sea oats, is a clumping, rhizomatous perennial grass of the eastern and central United States, found in the wild along wooded creek banks, river bottoms, and shaded slopes from Pennsylvania south to Florida and west toward the prairies. The broad, bamboo-like blades are wider than most grasses can claim, and the plant carries them in a loose, arching mound that takes deep shade without sulking.
Muhlenbergia dumosa, bamboo muhly, is a desert-born grass with the grace of bamboo, drifting like cloud shadow across the canyon floor. From the arid uplands and rocky washes of northern Mexico and southern Arizona, where sun-scorched cliffs and canyon walls shaped the character of the species, bamboo muhly evolved to thrive on dry air and lean soils, and yet carries the fluid elegance of true bamboo, swaying at the faintest breeze.
Few native grasses put on a show like Muhlenbergia capillaris. For most of the year pink muhly is a modest, upright tuft of fine, wiry, dark green blades, easy to overlook. Then, in the shortening days of autumn, the whole clump erupts into a haze of tiny flowers, an airy cloud of pink to rose-red that seems to hover a foot above the foliage and glows when backlit by low sun. Massed in a drift, the effect is one of the most spectacular in the fall garden.
Shibataea kumasaca is the most civilized of bamboos, a low, dense, evergreen kind grown for tidy structure rather than height. The short, broad, oval leaves are unusual for a bamboo, closer to the foliage of ruscus or a small shrub than to the fine blades most bamboos wear, which is why the plant goes by ruscus-leaf bamboo. Growing to about four or five feet, the canes zigzag gently from node to node, giving a second common name, zig-zag bamboo.
