The summersweets are among the most fragrant of American shrubs, native to the moist woods, swamp edges, and pond margins of the eastern United States, where the white summer spikes scent whole acres of low ground. Country people knew the plant as Sweet Pepperbush, for the peppercorn-like seed heads, and as Summersweet, for the honey-and-clove perfume; the crushed flowers even raise a soft lather in water and once served as a woodland soap.
Clethra fargesii is the Chinese cousin of our native summersweets, a graceful deciduous shrub from the mountain woodlands of central and western China, gathered and named for the French missionary-botanist Paul Farges. Kin to the better-known Clethra barbinervis, the Chinese clethra stays a little shorter and carries dark, glossy green leaves, broadest through the middle and sharply toothed, that color bronze-red to maroon before they fall.
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.
A bold, dramatic subtropical, Brugmansia (Datura) suaveolens 'Pink' hangs huge, soft pink, trumpet-shaped flowers, sometimes eight inches or more, that pour out an intoxicating fragrance on warm evenings. Herbaceous and dieback in zone 8, treelike in zone 10, the angel's trumpet makes a fast, theatrical show through a hot summer.
A medium to large deciduous shrub closely related to the native buttonbush, Adina rubella wears smaller leaves and bears similar but daintier flowers: round, scented heads of pale pink and white, each bristling with styles into a small Sputnik, carried over a long season from early summer well into fall. The pincushion blooms draw bees and butterflies just as the buttonbushes do, and an open, arching habit gives the shrub a fine-textured grace.
A medium-sized evergreen shrub still little known in cultivation, Adina pilulifera carries small, glossy leaves and, in midsummer, round white flower heads about an inch across, each bristling with protruding styles like a tiny Sputnik. The effect is curious and charming, a pincushion of white set among shining foliage, and the evergreen habit earns the shrub a place where the deciduous buttonbushes leave a winter gap.
Aconitum uncinatum, the southern blue monkshood, is an uncommon and long-lived native of the eastern United States, scattered through the Appalachians and Piedmont in rich, moist woods, along streambanks, and in cool seeps. The slender stems ascend and lean, sometimes weakly climbing to several feet, carrying lobed leaves and, in late summer into fall, terminal racemes of medium blue, hooded flowers held on long stalks. The cowl-shaped upper sepal gives the monkshoods their name, and few native wildflowers match this clean, late-season blue.
Acer cissifolium is one of the trifoliate maples, a small deciduous tree whose leaves, divided into three coarsely toothed leaflets, look more like those of an ivy or a vine than of a maple, hence the common names ivy-leaved and vine-leaved maple. The species is native to the cool mountain forests of Japan, where these trees grow into an upright oval that broadens with age to a wide, rounded crown. Michael Dirr called the plant "extremely rare in cultivation but certainly worthy of consideration," and that judgment still holds.
Acanthus mollis is one of the great architectural plants of the garden, a clump-forming perennial whose large, glossy, deeply cut leaves are among the most recognizable of all foliage. They are, quite literally, the leaves of antiquity: their form was carved into the capitals of Corinthian columns by Greek and Roman builders, and the legend, told by Vitruvius, holds that the sculptor Callimachus took his inspiration from a clump of acanthus growing up around a basket left on a girl's grave. Few plants carry their history so plainly in their shape.
Acalypha pendula is a trailing, mat-forming little shrub grown for its curious flowers: soft, fuzzy, crimson catkins, three to four inches long, that hang like miniature chenille tails or a cat's tail among small green leaves. It is a dwarf cousin of the familiar chenille plant, and is sold under the common names dwarf chenille, firetail, and strawberry firetails.
Acacia visco, now placed by botanists in the genus Parasenegalia, is a graceful, fast-growing tree from the high country of northern Argentina, Bolivia, Chile, and Peru, where it is known simply as visco or viscote. The name nods to the sticky, resinous sap the tree exudes. Unusually among its thorny relatives it is thornless, with a light, open crown of ferny, twice-divided leaves that cast a dappled, forgiving shade.
Many of the finest ornamentals for the southern garden come from the deserts of the Southwest, and this Chihuahuan legume is a quietly handsome example. Acacia neovernicosa is an upright, spreading, thorny shrub clothed in twice-compound leaves so finely divided that the whole plant takes on a soft, smoky texture. The foliage carries a faint varnish, sticky to the touch, which gives the species both its botanical name and its common one, viscid acacia. In spring the branches are studded with small golden puffballs of bloom, abundant and sweetly fragrant, loud with bees on a warm morning.
Espino is the thorn tree of the South American dry country, the signature shrub of central Chile's espinal, where it grows so thickly alongside the Chilean wine palm that it gives whole landscapes their character. Its range runs on through Argentina, Bolivia, Paraguay, and Uruguay. Spiny and twiggy, armed with stiff, pale, almost-white thorns, it is handsome from a distance and best handled with gloves. Botanists now file it under Vachellia, though the gardening world still knows it as Acacia caven.
Set aside the family reputation. Acacia angustissima is the polite, thornless cousin in a clan better known for its armament, a soft green presence where you might brace for spines. Botanists have since moved it to its own genus, Acaciella, but in the trade it keeps the old familiar name. It grows wild across the dry grasslands and open woods of the south-central United States down into Mexico and Central America, carrying itself like a small green fountain of fine, ferny, twice-divided foliage that filters the light rather than blocking it.
Hardiness
Zones 7–9
Light
Full Sun
Height
4–5 ft.
Spread
4–5 ft.
Bloom
White
Plant type
Shrub
Traditional use
digestive health, pain relief, topical applications, general wellness
