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 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.
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.
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.
Threadleaf bluestar is grown for two seasons at once: a haze of soft, powder-blue stars in late spring, and a billow of fine, needle-thin foliage that turns a blazing clear gold in fall. Native to the Ouachita Mountains of central Arkansas, Amsonia hubrichtii forms a large, dense, shrub-like clump of upright stems clothed in those threadlike leaves, and the autumn color alone earns a place in any sunny border.
Dwarf bluestar is the compact, well-behaved member of the clan, a tidy mound of upright stems and soft green leaves topped in late spring with clusters of powder-blue, star-shaped flowers. Often treated as a low form of the eastern bluestar, Amsonia montana stays small and shapely, a fine choice where the taller bluestars would sprawl.
Eastern bluestar is the bluestar most gardeners know, a robust native perennial with broader, willowy oval leaves and the clear blue, star-shaped flowers that name the genus, carried in clusters at the stem tips in spring. Amsonia tabernaemontana grows happily in deep, moist soil in part shade, and rewards almost any reasonable site with bloom and easy good health.
Flame acanthus, better known as hummingbird bush, is a tough, airy deciduous shrub for hot, dry places, hung from late spring until frost with slender orange to red tubular flowers that ruby-throated hummingbirds cannot resist. Small, pointed leaves give a light, open texture, and the long bloom season makes Anisacanthus wrightii one of the best hummingbird plants for the southern garden.
A pumpkin-orange selection of the classic flame acanthus, Anisacanthus wrightii 'Pumpkin' trades the usual scarlet for warm, glowing orange, lighting the late-season garden with the same slender, tubular, hummingbird flowers. The clone was discovered at the San Antonio Botanic Garden and is generally taken to be the selection known as 'Pumpkin'.
Madeira vine is a fast, twining, deciduous climber with fleshy, heart-shaped leaves and sprays of tiny, fragrant cream-white flowers in late summer and fall. Anredera cordifolia climbs by winding tuberous stems, and a warty crop of aerial tubers along the stems, some as large as a small potato, is the surest mark of the plant and a ready means of increase.
Hardiness
Zones 7–9
Light
Full Sun / Part Shade
Height
10–20 ft.
Spread
6–10 ft.
Bloom
White
Plant type
Vine
Traditional use
topical applications, reproductive health, general wellness
Few spring sights stir the woodland gardener like wild columbine in bloom. Aquilegia canadensis hangs nodding red-and-yellow bells, spurred and lantern-like, over lacy blue-green foliage, catching the low light of April along forest edges, rocky outcrops, and Appalachian coves where the plant has grown for ages. The eastern red columbine, or simply wild columbine, is among the most beloved of native spring wildflowers.
