A low, often half-prostrate form of the red buckeye, Aesculus pavia var. humilis keeps to a small, spreading shrub where the typical red buckeye grows into a small tree. The scarlet spring flowers come in smaller panicles, and in every other respect the plant follows the species: lustrous palmate leaves that break early, a love of moist, well-drained woodland soil, and the same magnetism for returning hummingbirds.
A red or scarlet flowered buckeye of the Gulf Coast, Aesculus splendens stands close to the red buckeye, Aesculus pavia, and may be no more than a striking form of that species. Dirr, in his Manual of Woody Landscape Plants, notes that Rehder listed this buckeye as a distinct species and that several horticulturists feel strongly about the authenticity, the chief differences being scarlet flowers and leaves felted on the undersides. Native to Louisiana and perhaps other Gulf Coast states, the scarlet buckeye is grown much as the red buckeye is.
The yellowwoods are to South Africa roughly what the live oaks are to the Lowcountry: the tree everyone knows, the tree in the old photographs, the tree the furniture was made from. Afrocarpus falcatus, the Outeniqua yellowwood, is the tallest of them, a conifer of coastal and montane forest from the Eastern Cape north through Mozambique and Malawi, reaching thirty to sixty feet in cultivation and a great deal more in the deep forest at Tsitsikamma. The famous specimens live for centuries and carry trunks two or three feet through. Yellowwoods collectively are treated as South Africa's national tree, and cutting one is regulated by law.
Agarista populifolia, still catalogued nearly everywhere as Leucothoe populifolia, is the giant of a group otherwise built low to the ground. Where most leucothoes hug the shade at knee height, this one rises, sending up tall, erect stems that arch at the tips into a fountain of glossy evergreen leaves, and given years and room the shrub can pass for a small multi-stemmed tree of twelve to fifteen feet.
The century plant is the great architectural agave, a broad rosette of thick, gray green, spine-tipped leaves that can spread six to eight feet across, each leaf edged with hooked teeth and ending in a hard dark spine. The form is bold and symmetrical, a piece of living sculpture for a hot, dry corner, and the silver cast of the foliage carries the planting through every season.
A small, bright green agave with a clean white stripe down the center of each short, broad, toothed leaf, Agave lophantha 'Splendida' is a compact, clumping selection of a species native to South Texas and Mexico. The variegated rosettes stay neat and low, a jewel-box agave for a trough, a container, or the front of a hot, sunny bed.
The tung oil tree is a handsome medium-sized deciduous tree, broad and spreading, with large heart-shaped to lobed leaves up to ten inches across and showy panicles of white flowers, blushed pink and orange at the throat, that open in spring before or with the new foliage. Few flowering trees of the Deep South make a fuller spring show.
A graceful native onion, Allium cernuum, the nodding onion, lifts loose clusters of pink to lavender, bell-shaped flowers that bend over in a soft arc at the top of slender stems, swaying through mid and late summer above tufts of grassy, blue-green foliage. The nodding habit gives the plant a particular charm, and the flowers draw native bees, butterflies, and other pollinators in good numbers.
Hardiness
Zones 4–8
Light
Full Sun / Part Shade
Height
12–18 in.
Spread
6–8 in.
Bloom
Pink
Plant type
Perennial
Traditional use
respiratory support, digestive health, immune support
Korean mountain ash is the unusual member of the clan, a deciduous tree from Korea, recently moved by botanists from Sorbus into the genus Alniaria, with simple, finely toothed, alder-like leaves rather than the compound leaves of the familiar mountain ashes. White flower clusters open in May, and the fall foliage turns warm shades of orange and red.
Seaside alder is a medium to large deciduous shrub, sometimes a small tree, with glossy, oval, toothed leaves and a habit of doing things backward. Where every other native alder flowers in spring, Alnus maritima opens elongated catkins in the fall, then carries small, woody, pinecone-like fruits through winter for quiet ornament.
Sweet almond verbena is grown for one glorious thing above all: scent. From midsummer until hard frost, Aloysia virgata tips every branch with slender spikes of small white flowers that pour out an intoxicating vanilla-almond fragrance, strongest in the late afternoon and evening and carrying clear across a garden. Butterflies and hummingbirds work the spikes all season.
A hardy evergreen ginger of unsettled name, this Alpinia forms dense, upright clumps of lance-shaped leaves that hold their fresh green right through the year in a mild climate, bringing a lush, tropical structure to the shade garden. In the warm months, bright yellow flower spikes rise above the foliage for an unexpected lift of color in deep shade.
Amelanchier canadensis is the coastal-plain member of a confusing and much-loved genus, a suckering multi-stemmed shrub or small tree of fifteen to twenty-five feet that reads as a thicket in the wild and as an airy vase in the garden. The show begins absurdly early: white flowers in short upright racemes open on bare gray wood while the woods are still brown, hold for a week or so, and then go. Fruit follows in June, raisin-sized, ripening green to red to a deep purple-black, sweet with a faint almond note. Autumn runs from yellow through orange to russet-red, and the bark, smooth and silver-gray with darker striping, carries the winter.
Hardiness
Zones 4–8
Light
Full Sun / Part Shade
Height
15–25 ft.
Spread
15–20 ft.
Bloom
White
Plant type
Shrub
Traditional use
digestive health, general wellness, immune support, reproductive health
Among the rarest of the serviceberries, Amelanchier nantucketensis is a low, thicket-forming shrub that Eugene Bicknell first described in 1911 from the sandplains of Nantucket, the Massachusetts island whose name the plant carries. Nantucket serviceberry belongs to a small, taxonomically slippery group within the rose family, so closely tangled with neighboring shadbushes that botanists have argued for more than a century over whether this is a true species or a stabilized hybrid. What sets the plant apart is disarmingly small: petals shorter than those of any other serviceberry in the Northeast, often dusted with pollen along their own margins, a quirk called andropetaly that appears nowhere else in the group.
Coastal serviceberry is the compact, low-growing member of a beloved native clan, a small deciduous shrub of the Atlantic coastal plain that spreads gently into colonies and opens clouds of white, five-petaled flowers in early spring, among the first shrubs to bloom as the woods wake.
Amelanchier x grandiflora is the apple serviceberry, a naturally occurring cross between two eastern natives, the downy serviceberry and the smooth Allegheny serviceberry, and 'Autumn Brilliance' is the selection that made the group famous. The Illinois nurseryman Willet Wandell found this seedling in his Urbana nursery and introduced the plant to gardens in 1986 under U.S. Plant Patent 5,717, choosing the seedling above all for the blaze of autumn color behind the name. Decades on, 'Autumn Brilliance' remains the most widely planted serviceberry in the trade, prized for a vigorous, gracefully branched frame and reliable good looks in every season.
Apple serviceberry, Amelanchier x grandiflora, is the graceful natural hybrid of two eastern native serviceberries, the downy and the smooth Allegheny, and 'Princess Diana' is among the loveliest selections of the group. The plant appeared in a cultivated garden in Elm Grove, Wisconsin, was propagated and introduced by Tom Watson of Christom Farms Nursery in Cambridge, Wisconsin in 1983, and was granted U.S. Plant Patent 6,041 in 1987, chosen for a wide, gracefully spreading canopy, generous white bloom, and fall color that arrives early and holds late. Where many serviceberries grow stiffly upright, 'Princess Diana' reaches outward, a small tree with the airy, layered poise the name suggests.
Amorpha fruticosa, the false indigo bush, is the largest and most widespread of the native false indigos, a fast, open, deciduous shrub that carries long spires of tiny deep blue-purple flowers, each lit with a single vivid orange anther, at the branch tips in late spring and early summer. From a suckering base rise arching stems six to twelve feet tall, clothed in soft, ferny, pinnate leaves that give off a clean, resinous scent when crushed. In full bloom the whole shrub seems to smoke with color, and the flower spikes hum with bees.
Hardiness
Zones 4–9
Light
Full Sun / Part Shade
Height
6–12 ft.
Spread
6–12 ft.
Bloom
Purple
Plant type
Shrub
Traditional use
digestive health, general wellness, pain relief, topical applications
Smooth false indigo is a rare deciduous shrub of sandy southern streambanks, carrying pinnate, compound leaves whose leaflets are notably large and rounded, a softer, more luxuriant texture than the ferny foliage of the common false indigos. In early summer the branch tips raise slender spikes of tiny blue to purple flowers, each lit with the bright orange anthers typical of the genus.
Ampelaster carolinianus is a woody, scrambling, semi-evergreen vine that climbs through shrubs and over stream banks along the coastal plain of the southeastern United States, opening lavender-blue flowers in November and December when every other aster has long since finished. The climbing aster keeps a private schedule, and that contrary timing is the whole charm.
