Iris cristata is the iris scaled down for the woodland floor, a dwarf native barely six inches high that spreads into low, overlapping fans of bright green blades. In mid to late spring the mats light up with small flowers, an inch and a half to two inches across, in soft lavender-blue to violet, each fall stamped with a white patch and a raised orange or yellow ridge. That ridge is the crest that gives the plant both the Latin name cristata, crested, and the common name crested iris, and the feature sets the species apart from the bearded and beardless irises alike.
Among the wild irises of North America, Iris fulva is the one that broke the color rules. Where the family runs to blues, purples, and yellows, the copper iris opens in warm coppery red to burnt orange, a shade no other native iris offers, carried on slender stems in late spring and early summer with a soft, slightly drooping poise. The Latin fulva, meaning tawny or reddish-brown, records that unusual color, and the common names, copper iris and red iris, say the same thing more plainly.
Itea virginica, the Virginia sweetspire, is a native shrub of eastern wetlands and streambanks, grown for fragrant white flower spikes in early summer and a fall display of red, orange, and burgundy. 'Longspire' is the selection chosen for its flowers: a form that carries notably long, white racemes, arching sprays of small fragrant blooms that outdo the wild plant for length and presence in early summer.
Itea virginica, the Virginia sweetspire, is a native shrub of eastern wetlands and streambanks, grown for arching, fragrant white flower spikes in early summer and brilliant fall color. 'Sarah Eve' is the exception in the family, the first pink sweetspire: the small flowers are essentially white, but they are carried on rosy-pink pedicels that tint the whole arching raceme a soft, distinctive pale pink, a color no other Itea offers.
Liatris spicata, the blazing star or gayfeather, sends up rockets of feathery purple in the heart of summer, one of the great vertical accents of the North American prairie. The species is native to the moist meadows, prairies, and wet savannas of eastern North America, where the flower spikes once rose in their thousands among the tall grasses. Set against those horizontal sweeps of grass, the erect, bottlebrush spikes give any planting a jolt of structure and color.
Hardiness
Zones 3–9
Light
Full Sun / Part Shade
Height
2–4 ft.
Spread
1–2 ft.
Bloom
Purple
Plant type
Perennial
Traditional use
immune support, respiratory support, detoxification & cleansing, digestive health
Where the cardinal flower runs to scarlet, Lobelia siphilitica answers in blue. The great blue lobelia sends up leafy spikes packed with inch-long, two-lipped flowers of clear, saturated blue in late summer and early fall, one of the truest blues in the native flora and a gift to the garden at a tired time of year. The species grows wild across eastern and central North America in moist meadows, low woods, and along streamsides.
Lonicera sempervirens 'Leo' is the coral honeysuckle at its free-flowering best, a selection of the native red honeysuckle that covers itself in bright red, yellow-throated trumpets over an unusually long season. The tubular flowers pour nectar for ruby-throated hummingbirds, which find the vine as irresistible as gardeners do, and the blue-green leaves, some fused right around the stem, make a cool foil for all that heat.
Monarda fistulosa, wild bergamot, is one of the great native perennials of the North American prairie, a hardy, aromatic member of the mint family loved for showy heads of lavender-pink and for a fragrance like oregano crossed with mint. The species grows wild in meadows, prairies, and open woods across most of the continent, and brings both vivid summer color and a deep well of history to the garden.
Before European settlement reshaped the eastern landscape, Prunus americana was a fixture at the forest edge: thicket-forming, thorny, and extravagantly beautiful in early spring when the plum covered itself in white flowers before the leaves had even stirred. The Lakota knew the plum as kañta, the Cherokee as gunasdv, and across dozens of nations from the Great Plains to the Appalachians the tree was considered a plant of genuine importance. The fruits were eaten fresh, dried into cakes, and worked into pemmican, the dense, calorie-rich mixture of dried meat, fat, and fruit that sustained people through long winters and longer journeys. The inner bark was used medicinally, and the dense, close-grained wood was worked into tools. This was not an ornamental plant in the minds of the people who knew it first. The plum was a resource, in the fullest sense.
Prunus caroliniana, the Carolina cherry laurel, is a fast, dense broadleaf evergreen native to the coastal plain of the southeastern United States, from North Carolina to Texas. The glossy, deep green, finely toothed leaves and tight, upright habit make the tree one of the South's most useful evergreen screens, and the crushed foliage carries the sharp almond, maraschino-cherry scent that marks the genus.
Ptelea trifoliata, the hop tree or wafer ash, is a unique and underappreciated native, a small, bushy deciduous tree of eastern and central North America. Highly adaptable, the plant takes dry, rocky ground as readily as moist, well-drained sites, which makes the hop tree a fine choice for naturalized landscapes, pollinator gardens, and woodland edges.
Nuttall oak is named for Thomas Nuttall, the restless English-American naturalist who botanized the young United States more thoroughly than almost anyone of his generation. Long known as Quercus nuttallii, the tree now carries the name Quercus texana in most botanical usage, a change that has caused no end of confusion, since the name once belonged to a different oak. Whatever the label, this is a large deciduous red oak of the Southern bottomlands, at home in the floodplain forests of the Gulf Coast and the Mississippi valley.
This is a rare and radiant selection of the Florida azalea, Rhododendron austrinum, chosen for flowers of pure, clear yellow. Where the species usually runs to golden-orange, this form holds a clean, buttery, luminous yellow, a color that lights up the spring woodland like sunshine slipping through the canopy. For gardeners and collectors who love the native azaleas, a truly pure-yellow austrinum is an uncommon prize.
Ruellia caroliniensis, the Carolina wild petunia, is a modest, long-blooming native that carries far more ecological weight than the quiet flowers suggest. From early summer into fall, a steady succession of lavender to violet-purple trumpets, each an inch or two across and lasting only a single day, opens along upright stems a foot or two high, replaced faithfully the next morning so that the plant is seldom out of bloom for months on end.
Royal catchfly wears the most electric red in the native flora. Silene regia sends up leafy, upright stems two to four feet tall, topped in mid to late summer with loose clusters of brilliant scarlet, star-shaped flowers, each with five deeply notched petals. Few prairie plants flower in true red, and fewer hold that color through the heat of July and August, which makes this native a genuine standout.
Blue-stemmed goldenrod is the goldenrod for shade. Where most of the clan demand open sun, Solidago caesia threads through the dappled light of the eastern woodland, arching slender, blue-purple stems that carry small, brilliant yellow flowers packed into the leaf axils, so the bloom runs the whole length of each stem like a garland. That habit gives the second common name, wreath goldenrod, and the late-summer to autumn color arrives just as the shade garden begins to fade.
In the open oak-hickory woodlands and fire-maintained savannas that once covered the upland South, Georgia aster was a fixture, a late-season native sending up violet-blue flowers in October and November at the precise moment when almost everything else had finished. That landscape is largely gone now, and the aster went with most of it.
Pond cypress is the quieter of the two native bald cypresses, a deciduous conifer closely related to the more widespread Taxodium distichum but smaller, tidier, and distinct in leaf. Where bald cypress wears soft, feather-like foliage, pond cypress carries fine, scale-like leaves pressed close and ascending along the shoots, giving the young tree a narrow, almost columnar, pyramidal outline.
There are few sights more stirring than a wisteria in bloom, and 'Amethyst Falls' offers all the romance without the unruly habits of the Asian cousins. This refined selection of the native American wisteria, Wisteria frutescens, pours out cascades of fragrant, lavender-violet blossoms in late spring, with smaller flushes through summer, a soft echo of springtime returning again and again.
John Bartram collected Xanthorhiza simplicissima from the Carolina mountains sometime before 1776 and brought the plant back to his famous Philadelphia garden, which tells you two things: that yellowroot has been in cultivation for as long as this country has existed, and that people who know plants have always recognized something worth paying attention to here. The Cherokee had known the plant far longer, using the roots, sliced open to reveal a vivid, almost electric chrome yellow, as a dye, a bitter tonic, and a medicine for ailments from mouth sores to stomach complaints. The active compound is berberine, the same antimicrobial alkaloid found in goldenseal, and the roots produce berberine in striking quantity. Xanthorhiza is Greek for yellow root, and the name is no metaphor.
