The garden's backbone: flowering trees, native and rare shrubs, and evergreens that hold their shape through every season. Many are Southeastern natives; others are quiet collector's plants you won't find at a big-box nursery, chosen for resilience and lasting, year-round interest.
This oak carries the name of a Pennsylvania parson. Gotthilf Heinrich Ernst Muhlenberg was a Lutheran minister who botanized on the side, thoroughly enough that the German-American botanist George Engelmann named the species for him, and then misspelled it: Engelmann set an umlaut over the u that Muhlenberg never used, and the rules of botanical naming have fossilized the slip ever since, transliterating it into the tongue-twisting muehlenbergii we are stuck with.
The cup gives them away. Most oaks set their acorns in a cup of overlapping scales, but Quercus myrsinifolia belongs to the ring-cupped oaks of East Asia, the Cyclobalanopsis, whose acorn sits in a cup banded with smooth concentric rings like a tiny stacked beehive.
Myrtle oak takes the name from the leaf, small and leathery and rolled at the edges like a true myrtle, which is about as far from the broad, lobed oak of the schoolbook as the genus travels. Quercus myrtifolia is a creature of the Florida scrub and the sand-pine ridges along the southeastern coast, the bright, fast-draining places where the salt comes in on the wind and the soil is mostly quartz.
Few oaks in North America are rarer. Quercus oglethorpensis went unnoticed by science until 1940, when the botanist Wilbur Duncan described the tree from material gathered in Oglethorpe County, Georgia, and gave the species the county's name. Even now Oglethorpe oak is known from only a scattering of stands across the Georgia and South Carolina Piedmont, with far-flung outliers in Louisiana and Mississippi, and the species sits on every serious list of oaks of conservation concern.
Dwarf chinquapin oak is the oak for gardeners in a hurry, a small, shrubby white oak that starts bearing sweet acorns while still only a few feet tall. Where most oaks make you wait a generation, this one fruits at three to five years old and crops nearly every year after, a rare and useful trick. The plant grows as a rhizomatous, colony-forming shrub or small tree of ten to twenty feet, clothed in glossy, chestnut-like leaves with wavy, blunt teeth.
A small-to-medium evergreen oak unlike anything in the North American flora. Quercus salicina belongs to section Cyclobalanopsis of the oak genus, the ring-cupped oaks, an entirely Asian group of evergreen oaks distinguished from every American oak by the concentric rings on the acorn cup, rather than the overlapping scales of the red and white oak groups. Some taxonomists treat Cyclobalanopsis as a genus of its own. To grow this oak in a Southeastern garden is to bring in a fundamentally different evolutionary lineage, one that has been evolving in isolation in the temperate forests of Japan and Korea for tens of millions of years, in parallel with the separate American radiation. The result reads as recognizably Quercus in habit and presence, yet is architecturally distinct in nearly every detail.
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.
Few trees carry the weight of the South the way the live oak does. Quercus virginiana is the massive, broad-spreading, long-lived evergreen oak of the coastal plain from Virginia to Texas, the tree of avenues and old plantations, of moss-hung branches reaching low and wide over generations of the same ground. Given room and time, a live oak grows far wider than tall, the great limbs sweeping out and often down to rest on the earth, and the whole tree becomes a piece of living architecture. Georgia named the live oak the state tree, and ancient specimens are landmarks across the Deep South.
The Southern live oak needs no introduction in the coastal South, where the great, spreading, moss-draped evergreens are as much a part of the landscape as the light. Quercus virginiana 'Bok Tower' begins from that familiar species but carries an unusual story and, perhaps, an unusual future.
Rhaphiolepis umbellata is the hardiest of the Yeddo hawthorns, an evergreen member of the rose family (Rosaceae) that grows wild on the sea cliffs and coastal thickets of Japan and Korea. The genus name joins the Greek raphis, a needle, with lepis, a scale, a nod to the narrow bracts beneath the flower clusters, while the species epithet umbellata describes the way the blossoms gather into rounded, umbel-like heads. Western gardeners know the shrub as Indian hawthorn, a slightly misleading name, since the plant hails from East Asia rather than the subcontinent and is no true hawthorn at all.
Sunbow Solar Flare is the patented name for the azalea catalogued as Rhododendron 'QbackB' (U.S. Plant Patent 27,083), a deciduous native hybrid bred for the very conditions that defeat most azaleas. The plant traces to a deliberate cross made in 1984 by Robert Edward Lee in Folsom, Louisiana, who set out to combine the fragrance and vivid color of the Gulf Coast's own Florida azalea, Rhododendron austrinum, with the substance of the Exbury hybrids. A seedling from austrinum open-pollinated with the hybrid 'Gibraltar' was crossed onto 'Chetco', and from that union Lee selected this standout in 1990.
'Aromi Sunrise' is a deciduous azalea from the storied breeding program of Dr. Eugene Aromi, the University of South Alabama professor who spent decades teaching heat-shy azaleas to flourish along the Gulf Coast. Introduced in 1987, this hybrid marries the bold Knap Hill azalea 'Hiawatha' with the native Florida azalea, Rhododendron austrinum, so the plant inherits both the size and clarity of the English strains and the toughness and fragrance of a southern wildflower. The result is exactly what Aromi chased across more than a thousand crosses: a large-flowered, sweet-scented, heat-tolerant azalea for gardens where the classic mountain sorts fail.
'Aromi Sunstruck' is one of the deciduous azaleas raised by Dr. Eugene Aromi, the Mobile educator whose decades of patient hybridizing gave the Deep South a whole race of heat-tolerant azaleas. Beginning in the late 1960s, Aromi crossed the large, brilliant Exbury and Knap Hill strains with hardy southern natives, above all the Florida azalea, Rhododendron austrinum, to win big, fragrant flowers on shrubs that could take Gulf Coast summers. He described more than fifty thousand seedlings over a lifetime of work and named only the finest hundred or so; 'Aromi Sunstruck' carries that pedigree of selection.
Rhododendron alabamense, the Alabama azalea, is one of the loveliest and, by wide agreement, one of the most powerfully fragrant of all the wild deciduous azaleas of the Southeast. The species grows in hardwood forests and along dry slopes and ridges from north-central Alabama east through western Georgia and into South Carolina, where in mid spring the woods fill with the scent of lemon. Clusters of six to ten white, funnel-shaped flowers, each marked with a clear yellow blotch and finished with long, arching stamens, open just before or alongside the emerging leaves. The genus name Rhododendron means rose tree in Greek, while azalea derives from azaleos, meaning dry, a nod to the well-drained upland ground these shrubs favor.
Rhododendron arborescens, the sweet or smooth azalea, is one of the hardiest and most graceful of the native white azaleas, a tall, loosely branched deciduous shrub of the eastern mountains and piedmont. The common name smooth azalea points to the hairless, glossy twigs and leaves that set the species apart from woollier kin, while sweet azalea speaks to the flowers, which pour out a rich heliotrope perfume. The species epithet arborescens is Latin for becoming tree-like, a fair description of an old plant that can reach ten to eighteen feet, and the genus name Rhododendron means rose tree in Greek.
Rhododendron atlanticum, the coastal or dwarf azalea, is a low, colony-forming native of the open pine woods and sandy flatwoods of the mid-Atlantic and Carolina coastal plain. Unlike the tall wild azaleas of the mountains, this species stays close to the ground, often no higher than the knee, and spreads by underground runners, or stolons, into broad, drifting colonies. The bluish, glaucous foliage is a hallmark, cool and sea-gray, and the species name atlanticum simply marks the plant's home along the Atlantic seaboard. The genus name Rhododendron means rose tree in Greek; azalea comes from azaleos, meaning dry, a fitting root for a shrub of sandy, well-drained ground.
This fragrant deciduous azalea is a garden cross between two native species, the low, glaucous-leaved coast azalea, Rhododendron atlanticum, and the golden Florida azalea, Rhododendron austrinum. From the first parent the hybrid inherits sweet fragrance and cool foliage; from the second, warmth of color and vigor. The result, selected here for pale, clear yellow flowers, blends the best of both, and where the ranges of the two species meet along the Southern coastal plain, such crosses occasionally arise in the wild as well.
Rhododendron austrinum, the Florida azalea, is among the earliest and most powerfully fragrant of all the wild deciduous azaleas of the Deep South. Native to the Florida Panhandle, southern Georgia, southern Alabama, and into Mississippi, the species haunts open pine woods, ravine slopes, and river bluffs, often growing in sandy, acidic ground beneath tall longleaf pines. The species name austrinum simply means southern, a fitting label for an azalea so at home in the Gulf Coast heat, and the genus name Rhododendron means rose tree in Greek.
Rhododendron austrinum 'Don's Variegated' is a rare variegated form of the native Florida azalea, carrying the wild flame azalea of the Gulf states but brushed with a fine tracing of gold along each leaf edge. The selection was discovered by Don Jacobs, the noted Georgia plantsman behind Eco-Gardens in Decatur, who found among seedlings of R. austrinum a plant whose foliage held light even before the flowers arrived. Variegation is uncommon in the native azaleas, which makes this a genuine collector's plant.
'Millie Mac' is a wild-selected native azalea from the damp hollows of Escambia County, Alabama, where Floyd McConnell found this plant as a distinctive limb sport on a wild shrub and propagated it for a beauty all its own. Related to the Florida azalea, Rhododendron austrinum, the selection shows white-margined flowers that hint at a touch of R. canescens in the background, and the lineage remains a matter of pleasant debate among native-azalea growers.
