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.
The white-flowered form of swamp milkweed, Asclepias incarnata 'Ice Ballet' carries the same upright, well-mannered habit as the species but trades rosy pink for clusters of pure, cool white, held atop sturdy three-to-four-foot stems through summer. The effect is fresh and luminous in a moist border, and just as useful to wildlife.
Smooth aster is one of the cleanest and most dependable of the fall natives, and 'Bluebird' is among the best forms. Aster laevis 'Bluebird' builds an upright, vase-shaped clump of smooth, blue-green foliage, then opens, in late summer and fall, sprays of violet-blue daisies centered in gold, a generous late feast for bees and butterflies as the season winds down.
Callicarpa dichotoma 'Issai', the purple beautyberry, is a compact, cold-hardy selection grown for a heavy crop of glossy, violet-purple berries that ring the stems from late summer well into fall. Smaller and tidier than the American beautyberry, 'Issai' fruits young and freely, often setting berries on a single plant, and holds the color long after the leaves have gone.
The rockroses bloom as if for a single day, and in a sense they do. Each papery flower of Cistus x purpureus lasts only from morning to evening before dropping, yet through late spring the shrub opens fresh bloom after fresh bloom, so the whole plant seems perpetually covered. The flowers are the draw: two to three inches wide, crushed-silk petals of pinky purple, each stamped at the base with a deep maroon blotch, a marking that earned the old garden name orchidspot rockrose. Rockroses are not roses, and are not related; the resemblance is only in the open, five-petalled face.
Woodlanders has long led in offering citrus and citrus hybrids hardy well beyond the usual citrus belt, and the Morton citrange is a handsome one. Like other sweet orange and trifoliate orange crosses, Morton makes an attractive ornamental evergreen, with fragrant white spring flowers and orange fruit, but the fruit here sets the cultivar apart: large, smooth-skinned, and remarkably like a true orange, with very few seeds.
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.
Clinopodium coccineum is a small, aromatic, semi-evergreen subshrub of the mint family, native to the deep, well-drained sands of the southeastern coastal plain, from Mississippi and Georgia down into Florida. The loose, open frame and small, spicy-scented leaves would earn a quiet place on their own, but the flowers are the event: showy scarlet tubes carried over a long summer season, held out like little trumpets that hummingbirds cannot resist.
The genus name Dietes comes from the Greek for "having two relatives," a botanist's nod to the plant's kinship with both Iris and Moraea, near neighbors in the iris family. The species epithet bicolor means simply two-colored, for the soft yellow petals brushed with a dark thumbprint at the base. Between the two words, the whole plant is named for doubleness: two kin, two colors.
Grevillea 'Canberra Gem' is a bold and unusual Australian evergreen, a hybrid of Grevillea juniperina and Grevillea rosmarinifolia that brings fine texture, vivid color, and a touch of the exotic to an adventurous garden. The narrow, needle-like foliage is often mistaken for a conifer, until late winter, when the shrub reveals a true identity in a profusion of rose-red, spider-like flowers that spill from the branches and catch the eye clear across the garden.
Grevillea rosmarinifolia is a fine-textured Australian evergreen, a rounded to semi-prostrate shrub whose narrow, deep green leaves look uncannily like rosemary, giving the plant both the species name and a handsome, needled presence the year round. The likeness is only skin-deep, for this is a member of the protea family, Proteaceae, worlds away from any herb.
Hosta yingeri is one of the more recent hostas to reach gardens and one of the most distinct, a species found only on a scatter of rocky islands in the Huksan Archipelago off the southwestern coast of Korea. The American plantsman Barry Yinger collected the plant on Taehuksan Island in 1985, and the botanist Samuel B. Jones formally named the species in 1989 in Yinger's honor. For a genus most gardeners associate with the woodlands of Japan, this Korean islander broadened the family map.
The horticulturist Scott Ogden, in Garden Bulbs for the South, sets the scene: the Japanese roof iris, Iris tectorum, is famous in the native country as a flower for planting on sod roofs, just as houseleeks are used on the cottage roofs of France. In gardens the silky green fans of leaves form large patches, a fine subject for the foreground of a shady border, and in April the ruffled, orchid-like blooms appear among the handsome leaves. In the common form these are a rich mottled blue with white crests; even lovelier, Ogden adds, are the white, yellow-crested blooms of the form offered here.
The horticulturist Scott Ogden, in Garden Bulbs for the South, sets the scene: the Japanese roof iris, Iris tectorum, is famous in the native country as a flower for planting on sod roofs, just as houseleeks are used on the cottage roofs of France. In gardens the silky green fans of leaves form large patches, a fine subject for the foreground of a shady border, and in April the ruffled, orchid-like blooms appear among the handsome leaves. This is the common form, in which the flowers open a rich mottled blue, veined and freckled toward the center, with white crests.
Most mountain laurels are shrubs with presence, upright and woody and faintly aristocratic. 'Croft Carpet' flips the script. This rare, prostrate selection of Kalmia latifolia stays low and spreads into a dense evergreen mat, delivering the understory finish that designers chase in shade gardens: lush, deliberate, and quietly polished. A specimen at the JC Raulston Arboretum measured only about one foot tall while spreading many times as wide.
Lindera megaphylla is a plant for the patient collector, a broad-leaved evergreen of real presence and pedigree that reveals itself over seasons rather than days. The species comes from the mist-laden mountain forests of western China, where the shrub grows in dappled light among rhododendrons and ancient oaks. Sir Harold Hillier, the great British plantsman, first shared this rarity with Western gardens in the 1970s from his famous nursery, and even now the Chinese spicebush remains uncommon in cultivation.
Manfreda maculosa carries the rugged beauty of the American Southwest into the garden. Known by a string of evocative names, Texas tuberose, spice lily, and rattlesnake agave, this striking plant hails from the arid country of Texas and northern Mexico, where the spotted leaves and tall, aromatic flower stalks have caught the eye of gardeners and naturalists for generations.
Monarda fistulosa, wild bergamot, is one of the great native perennials of the North American prairie, a hardy, aromatic member of the mint family loved for showy heads of lavender-pink and for a fragrance like oregano crossed with mint. The species grows wild in meadows, prairies, and open woods across most of the continent, and brings both vivid summer color and a deep well of history to the garden.
Nerium oleander has been grown around the Mediterranean since antiquity, the name Nerium drawn from the Greek neros, watery, for the streamsides where the shrub grows wild. 'Variegata' brings that ancient toughness together with luminous foliage: narrow, leathery leaves edged in creamy white around a deep green center, held in whorls along the stems so the whole shrub seems lightly frosted even when out of flower.
Sundrops make a gentle joke of their family. Oenothera fruticosa ssp. glauca belongs to the evening primroses, a tribe famous for opening at dusk and closing by mid-morning, yet the sundrops break ranks and bloom by day, holding cups of clear, satiny yellow wide open through the sunlit hours of late spring and early summer. The genus name comes from the Greek oinos, wine, and thera, to hunt or seek, an old and disputed reference to a European relative whose roots were once thought to give a taste for wine; the epithet fruticosa means shrubby, for the firm, upright stems, and glauca notes the blue-green bloom on the foliage.
