The plants you grow for your grandchildren. Canopy trees are the garden's largest and longest-lived residents, the shade-throwers and skyline-makers that set the scale of everything planted beneath them.
For most of botanical history the genus Parrotia was thought to hold a single species, the Persian ironwood (Parrotia persica) of the Caspian forests. Then came a small Chinese tree with a long and tangled paper trail. A fruiting specimen gathered in Jiangsu Province in 1935 sat in a herbarium drawer until 1960, when the botanist H.T. Chang described the specimen as a witch-hazel under the name Hamamelis subaequalis. The living tree, meanwhile, had vanished. The species was presumed extinct for half a century, until a 1988 expedition found the tree again, and only in the late 1990s did DNA settle the question once and for all: no witch-hazel at all, but a second Parrotia, sibling to the Persian across some 3,500 miles of Asia.
Phoebe chekiangensis is one of a group of Chinese evergreens that could give the American South a whole new kind of shade tree. Upright and clean-limbed, the tree carries dense, leathery, dark green leaves much like those of the related redbay, glossy and handsome the year round, and grows at a steady pace into a small to medium tree of real presence.
This Phoebe is a broadleaf evergreen tree in the laurel family, Lauraceae, and a relative of the redbay and the avocado in the genus Persea. The genus Phoebe gathers more than fifty species of evergreen trees and shrubs across subtropical and tropical Asia, long known in China as nanmu and prized for hard, fine-textured, aromatic timber used in fine furniture and building since ancient times.
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.
Prunus umbellata, the flatwoods plum, is a picturesque small deciduous tree native to well-drained soils across the southeastern United States. Where the Chickasaw plum forms suckering thickets, the flatwoods plum grows as a single, gnarled, small tree with rough, dark bark and a wide, open crown, an old-field and fence-row character that reads as quietly beautiful in age.
The little epaulette tree is a rare small deciduous tree or large shrub from eastern Asia, and the common name is the best description anyone has managed. In late spring and early summer the branch tips hang with drooping panicles of small fragrant white flowers, and the effect really is of fringed military shoulder boards swinging from the ends of the branches. The leaves are ovate and bristle-toothed, the habit open and spreading, and the whole tree has an unforced elegance that the heavier flowering trees never quite reach.
The fragrant epaulette tree is a deciduous tree of twenty to thirty feet in most gardens, spreading and open in habit, and the performance comes in late spring and early summer when long panicles of small white flowers hang from the ends of the branches and scent the air around the tree. Dirr's Manual of Woody Landscape Plants puts the case plainly: "the flowers are extremely handsome and develop when a limited number of plants are offering color." That timing is much of the value. By June most of the flowering trees have finished and the garden has gone green, and this one is only starting.
Quercus acerifolia is one of the rarest oaks in North America, and one of the most quietly beautiful. The name says the first thing you notice: acerifolia means maple-leaved, and the upper leaves really do look like a sugar maple's, often as wide as they are long, cut into three to five sharp, glossy lobes that turn deep red and burgundy in fall. A close relative of the Shumard oak, maple-leaf oak grows as anything from a stunted, multi-trunked shrub on a windswept ridge to a single-trunked tree of forty or fifty feet in cultivation.
Quercus agrifolia, the coast live oak, is the evergreen oak of the California coast, the gnarled, dark-canopied tree that shades the golden hills of Steinbeck country and spreads heavy limbs over ranchland and canyon. The holly-like leaves are small, thick, and leathery, glossy dark green above with a spiny-toothed edge, and the tree holds them year round, casting the deep, cool shade that is the plant's signature. Left room, coast live oak builds a broad, low, romantically crooked crown.
Quercus alba, the white oak, is the grandfather of the eastern forest, a slow, massive, long-lived tree that can stand for centuries and outlast the people who plant them. The most famous of all was the Wye Oak of Wye Mills, Maryland, a single white oak that stood for more than four hundred and sixty years and served as Maryland's state tree until a storm brought the giant down in 2002. The broad, rounded crown, the pale, scaly, ash-gray bark, and the deeply lobed, blue-green leaves are the picture most people carry of an oak.
Hardiness
Zones 3–9
Light
Full Sun / Part Shade
Height
50–80 ft.
Spread
50–80 ft.
Bloom
Yellow
Plant type
Tree
Traditional use
digestive health, topical applications, respiratory support
Quercus arizonica is the heavy, pale-barked white oak of the Madrean Sky Islands, the ranges that lift out of the desert in southeastern Arizona, southwestern New Mexico, west Texas, and northern Mexico. Growth is slow and the frame is broad: stout limbs, an irregularly spreading crown, and in time a trunk three feet through on a tree capable of sixty feet where the site allows, though garden specimens usually settle nearer thirty. The leaves give the species away, thick and stiff as harness leather, blue-green above and conspicuously pale and felted beneath, holding through most winters and dropping only as new growth pushes in spring. Old bark goes ashy white and deeply furrowed, which is where the common name comes from.
Sand live oak is the live oak of the sandhills, a tough, evergreen cousin of the great Southern live oak scaled for drier, leaner ground. Where Quercus virginiana spreads into a vast shade tree, this species usually stays a small tree or even a shrub, dark and dense and salt-proof, holding leathery evergreen leaves through the year on the deep, dry sands of the coastal plain.
Georgia oak is a rarity in every sense, a small, refined red oak so restricted in the wild that most people have never seen one. The species clings to the granite outcrops of west-central Georgia and central Alabama, the flatrock country around Stone Mountain, where thin soil keeps the plant stunted and shrubby; give the same tree good ground and it grows into a shapely small tree of fifteen to thirty feet, clothed in small, glossy, bristle-tipped leaves that turn red and burgundy in fall.
This is one of William Bartram's oaks. He came upon the tree on his travels through the southeastern backcountry in the 1770s, and the botanical name still carries his hand, Quercus hemisphaerica Bartram ex Willd., the species epithet meaning half-a-globe, for the little domed cap that sits like a skullcap on the acorn.
Shingle oak is the oak that fools people, an oak with no lobes at all. The glossy, dark green leaves are long, entire, and laurel-like, closer to a rhododendron or a bay than to the deep-cut foliage of most oaks, and only the single bristle at each leaf tip gives the family away. A medium to large deciduous tree of forty to sixty feet, neat and pyramidal when young and rounding with age, the tree brings a clean, distinctive texture that few other shade trees can match.
The name is the whole description: incana means hoary, gray-haired, and bluejack oak wears a coat of fine pale hairs that turns the foliage a soft blue-gray, almost silver in some lights, unusual in a genus that mostly trades in greens.
Turkey oak earns the name from the leaf, three-lobed and clawed and splayed exactly like the track a wild turkey leaves in sand, which is fitting, because sand is where these trees live. Quercus laevis is the signature oak of the deep sandhills, the droughty white-sand ridges of the longleaf country from the Carolinas to the Gulf, ground so poor and so hot that most trees simply decline the invitation.
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.
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.
