The flora of a whole continent, grown for the garden. This collection gathers the trees, shrubs, vines, and wildflowers native to North America, plants that evolved here alongside the birds, bees, and butterflies that still depend on them.
Summersweet, Clethra alnifolia, is one of the great fragrant natives of the eastern United States, a shrub of moist woods and pond edges whose white summer spikes carry a honey-and-clove perfume across the whole garden. Colonists called the plant Sweet Pepperbush, for the peppercorn-like seed heads that follow, and Summersweet, for the scent; the flowers even lather softly in water and once served as a field soap.
Summersweet, or sweet pepperbush, is one of the most useful of the native shrubs for moist, shaded ground, and 'Hummingbird' is the compact, free-flowering selection that made the species a garden staple. Like the straight Clethra alnifolia, this is a stoloniferous deciduous shrub that forms colonies in moist, acid soil, valued above all for the upright spikes of intensely fragrant white flowers that perfume the whole garden in the heat of summer, when little else is blooming.
The summersweets are among the most fragrant of American shrubs, and the southern woolly summersweet, Clethra tomentosa, carries the whole tribe's gifts: colonies of upright stems in moist, acid ground, and terminal spikes of white flowers that pour a honey-and-clove perfume across the July garden. Country people knew the plant as Sweet Pepperbush, for the peppercorn seed heads, and the crushed flowers even raise a soft lather once used as a woodland soap.
Cliftonia monophylla 'Berry Pink' is a rare, pink-flowered selection of the Black Titi, a native evergreen shrub or small tree of the southeastern coastal plain that normally blooms in white. The species haunts the acid bogs, pond margins, and titi swamps from the Carolinas to the Gulf, where the early flowers make the buckwheat tree one of the first and most important nectar sources of the southern year, the source of the prized titi honey.
Clinopodium coccineum is a small, aromatic, semi-evergreen subshrub of the mint family, native to the deep, well-drained sands of the southeastern coastal plain from Mississippi and Georgia down into Florida. The loose, open frame and small, spicy-scented leaves would earn a quiet place on their own, but the flowers are the event: scarlet tubes an inch or two long, held out like little trumpets. Bloom comes heaviest in spring and again in fall, with scattered flowers through the summer between, and in the mildest gardens of zones 8 and 9 the plant will open something in almost any month the weather stays soft.
Clinopodium coccineum ‘Ohoopee Yellow’ wears a contradictory name, since this is a clear, bright yellow-flowered form of a mint shrub that usually blooms in scarlet. Yellow forms turn up rarely in wild populations, and the floras note them in passing as a curiosity. This one was caught and kept.
Clinopodium georgianum is a low, aromatic shrublet of the mint family, grown for strongly scented foliage and clouds of soft pinkish-lavender flowers from late summer into fall, peaking around September when much of the garden is winding down. Where the scarlet calamint is a hummingbird firework, Georgia savory is the quiet one: smaller flowers, softer color, and a season that arrives when the bees have run short of options. Crushed, the leaves smell frankly minty, with a sweet edge that one nurseryman has compared to expensive peppermint candy.
Large-flowered scarlet calamint is a small, wiry, semi-evergreen subshrub of the Florida sandhills, close kin to the better-known red basil, Clinopodium coccineum, and distinguished chiefly by the size of the flowers. Slender scarlet tubes, generously long, open along the stems from spring through summer and are built precisely for hummingbirds, which find them quickly and come back. The leaves are small, neat and aromatic, throwing a clean mint scent when brushed, and the whole plant stays open and airy rather than dense, better placed at the front of a bed than in the middle of it.
The conradinas are dense, aromatic, low shrubs of the mint family, dressed in small, usually needle-like green or gray leaves and hung with little pale purple flowers. Six or seven species grow wild in the southern United States, most of them in Florida on sand or very sandy soil, and the genus carries an unusual weight of rarity: four species are federally listed, C. brevifolia, C. etonia and C. glabra as endangered and C. verticillata as threatened, with two more carrying state protection in Florida. Conradina canescens is the exception and the common one, a somewhat variable plant of the Gulf Coast dunes of northwest Florida and adjacent Alabama and Mississippi.
Conradina canescens ‘Gray Mound’ is a silver-leaved selection of the false rosemary that grows wild on the deep, pine-fringed sands of the northern Gulf Coast, in Alabama, Mississippi, and the Florida panhandle, where the species holds the back of the primary dunes and runs inland into sand pine scrub. A member of the mint family, this aromatic shrub carries soft, needle-like foliage in a ghostly silver-gray, and from March into November, heaviest in spring, offers pale lavender to bluish two-lipped flowers spotted with dark purple on the lower lip, which native bees work steadily.
Some years ago we introduced two selections of Conradina collected on the Styx River in southern Alabama, called 'Low Gray' and 'Low Green', and we hope those clones survive in cultivation somewhere still. On a return visit to the Styx River site we gathered several more cuttings from distinctly low-growing plants. This conradina haunts a sandy woodland and cutover near the Styx River, and may well represent a new, as yet undescribed species; what appears to be the same plant turns up some miles east on Blackwater State Forest in northwest Florida. The Styx River plant differs clearly from the taller, more upright Conradina canescens of the open Gulf Coast.
Coreopsis integrifolia, the Chipola River coreopsis, is a rare southeastern native that saves its show for the end of the season. When most of the summer flowers have gone over, this tickseed lifts deep golden-yellow daisies, each centered with a dark maroon eye, on slender stems well above the foliage, bringing fresh color to the fall garden. A choice and uncommon perennial, known in the wild from only a handful of counties, the plant is as valuable to the gardener as it is to the pollinators working late.
Native to the open prairies and meadows of North America, Coreopsis lanceolata, the lanceleaf coreopsis, has long been admired for bright, golden-yellow blooms and an easy, hardy nature. This perennial wildflower has been a staple of North American landscapes for a very long time, growing across a wide range of climates and soils, from sandy coastal ground to the rich prairies of the Midwest.
Coreopsis verticillata, the threadleaf coreopsis, is a clump-forming native perennial dressed in fine, thread-like foliage and covered through the long weeks of summer in small, bright yellow, daisy-like flowers. Native to the open woods and clearings of the eastern United States, threadleaf coreopsis has become one of the most popular of all garden perennials, an easy, airy, long-blooming plant for the sunny border.
There is a version of the flowering dogwood almost nobody has met. Cornus florida 'Suwanee Squat' was found in Suwannee County, Florida, by Bob Simons, a forest ecologist who spent half a century protecting the wild hardwood country of north Florida. As a young man in the early 1970s he walked a mixed-hardwood hammock outside Gainesville, decided the place was worth saving, and talked ten landowners and the state into making it San Felasco Hammock; that became the pattern of his life. A man who knew that kind of forest the way most of us know our own street is exactly the sort to notice a dogwood doing something a dogwood is not supposed to do. Woodlanders introduced his low, sprawling oddity to cultivation, and the plant has stayed scarce ever since, the kind of tree you mostly hear about secondhand from someone who saw one and never got over it.
Cornus florida, the flowering dogwood, is the beloved understory tree of the eastern North American woods, widely planted for the great show of white spring bracts (the true flowers are the small green knot at the center), and, in selections like this one, pink. A deciduous woodland tree that grows in moist, well-drained soil in sun or high, dappled shade, the dogwood rewards careful planting: set the root flare high, and never plant too deep.
The American smoketree, Cotinus obovatus, is an uncommon small to medium native tree, kin to the familiar European smoketree but bolder in leaf and rarer in gardens. The common name comes from the fruiting stage, when the loose, fuzzy flower panicles blur the whole crown into a soft haze of smoke. The broad, oval, blue-green leaves are noticeably larger than those of the European Cotinus coggygria, and they close the year in a spectacular blaze of orange, yellow, and red-purple, some of the finest fall color of any native tree.
Crataegus harbisonii is a small, thorny, deciduous hawthorn with unusually large leaves for the genus, white spring flowers, and red fall fruit. Behind that modest description stands one of the rarest trees in North America: Harbison's hawthorn was perhaps once fairly common around central Tennessee, but is now all but extinct in the wild.
The parsley haw, Crataegus marshallii, is a distinctive and graceful small native tree, named for the shiny, deeply dissected, parsley-like leaves that set the whole genus apart at a glance. White flowers centered with rosy-red stamens open in spring, followed by bright red fruit that lingers into fall.
Crinum americanum is the swamp lily of the southeastern coastal plain, a bulb throwing broad strap-shaped leaves two to three feet long in a loose arching rosette, with scapes of about the same height carrying two to six flowers in a terminal umbel. The flowers are the whole event: glistening white, six narrow tepals recurved into a star five or six inches across, the long filaments tipped with dark anthers and often flushed rose-pink toward the base. Fragrance arrives after dark, sweet and carrying, which tells you plainly what does the pollinating. Bloom comes in waves from late spring into autumn, and nearly year-round in frost-free gardens.
Hardiness
Zones 8–10
Light
Full Sun / Part Shade
Height
2–3 ft.
Spread
2–3 ft.
Bloom
White
Plant type
Perennial
Traditional use
respiratory support, digestive health, heart support
