Hibiscus coccineus 'Lone Star' is the pure white form of the scarlet rose mallow, and the change of color changes everything. Where the wild species blazes red, 'Lone Star' opens great five-pointed stars of clean, luminous white, five to seven inches across, glowing against deep green, finely cut foliage and all the more striking in the soft light of evening. The same tall, architectural native frame carries a cooler, more serene presence.
Cuban rose mallow is one of the tall, slender members of the perennial hibiscus tribe, a plant that reads as airy and upright rather than bushy. Through the summer the stems carry fairly large flowers in a soft purplish pink, the classic mallow saucer set against distinctly gray-green foliage, and the stems themselves are lightly prickly to the touch. Rising to seven or ten feet on narrow clumps, the plant lifts the bloom well up where the color can be seen from a distance.
Hibiscus dasycalyx is one of the rarest wildflowers in the country, described only in 1968, and even then from a mere handful of sites in the bottomlands of east Texas, in Houston, Trinity, and Cherokee counties, along the Neches, Angelina, and Trinity rivers. The total wild population has been estimated in the low thousands. Whole seasons of botanical fieldwork across the Southeast have turned up fewer plants than a single good nursery bed.
Hibiscus moscheutos, the rose mallow, is the hardiest of the perennial hibiscus and the tough, cold-proof parent behind most of the dinner-plate hibiscus sold today. The wild plant is a stout, clump-forming perennial of eastern marshes, rising to six or eight feet each summer and opening broad flowers to six inches and more, clean white or soft pink with a dramatic crimson eye at the center. For sheer size of bloom on a plant that shrugs off hard winters, little else compares.
'Peppermint Flare' comes with a well-documented pedigree, which is rare for a hardy hibiscus. The plant arose as a sport, a spontaneous mutation, of the hibiscus 'Flare', a nearly sterile rose-mallow hybrid bred by Dr. Sam McFadden and released through the University of Florida. The Texas horticulturist Greg Grant spotted and selected the peppermint-striped form, and in 2010 the plant was named a Texas Superstar, the designation reserved for tough, proven performers in the Southern heat.
Pineland hibiscus is the wilder, pricklier cousin among the native mallows, and all the more charming for a slightly untamed look. Through the summer the plant opens broad flowers several inches across in soft creamy yellow, each centered on a deep maroon eye, the classic hibiscus form scaled down and set on a low, spreading, bristly frame. The deeply lobed leaves are rough to the touch and the stems carry fine prickles, so the whole plant reads as a hardy native of open, sunny ground rather than a pampered border hybrid.
Hibiscus coccineus, the scarlet rose mallow or Texas star hibiscus, is a tall, dramatic perennial native to the wetlands and swamps of the southern United States. Rising on strong, upright stems to six or ten feet, the plant lifts great scarlet stars above the summer garden, an American native that looks every bit as exotic as any tropical hibiscus and proves far tougher.
Hibiscus grandiflorus, the swamp rose mallow, is a magnificent native perennial of the southeastern United States, grown for enormous soft-pink blooms and broad, velvety, gray-green leaves. Rising to eight or ten feet on stout stems, the plant brings a lush, almost tropical presence to the summer garden, at home in a wetland but just as striking in an ordinary bed or beside a pond.
The name requires a brief clarification, and then we can move on to the more interesting parts. Hibiscus mutabilis has been called the Confederate rose since the nineteenth century, when the plant naturalized so thoroughly in the gardens of the American South that people assumed it belonged there. The plant does not. The species belongs to Hunan Province in China, where gardeners have grown the shrub for nearly three thousand years, where the flower serves as the emblem of Chengdu, a city known on its account as the City of Hibiscus, and where classical texts on materia medica describe the flowers and leaves in medicinal detail. The name stuck here out of regional habit rather than botanical or historical accuracy, and the plant is indifferent to the label.
Hardiness
Zones 8–11
Light
Full Sun
Height
10–15 ft.
Spread
8–10 ft.
Bloom
Pink
Plant type
Shrub
Traditional use
topical applications, detoxification & cleansing, respiratory support
Hibiscus mutabilis has been grown in Southern gardens for so long that many people assume the shrub is a native, though the species traces to southern China, where gardeners prized the flowers centuries before the plant traveled west. The species name mutabilis, meaning changeable, describes the wild trick of the ordinary Confederate Rose, whose blooms open white in the morning and deepen to pink and then rose-red by evening. 'Rubrum' skips the performance and commits: the single flowers arrive already a saturated rose-red and hold that one deep tone through the day rather than shifting. For gardeners who love the late-season drama of the Confederate Rose but want a single, unwavering color, 'Rubrum' is the selection to plant.
Hibiscus palustris is the northern, cold-hardy face of the American rose-mallows, a marsh dweller whose species name comes straight from the Latin palus, a swamp or marsh. Botanists today often fold the plant into Hibiscus moscheutos as a subspecies, but the old name still travels with the pink-flowered marsh plants of the Northeast, and gardeners know exactly which plant the name marks. Where many tropical hibiscus sulk at the first frost, this perennial dies cleanly to the ground each winter and returns from a woody crown, unfazed by zone 5 cold.
'Tosca' is the offspring of a rare and deliberate cross, a marriage of Hibiscus paramutabilis, the regal, large-flowered species of southeastern China, with Hibiscus syriacus, the familiar Rose of Sharon of countless summer gardens. From that union comes a woody shrub that carries the best of both parents: the scale and drama of the Chinese species and the toughness and reliability of the old dooryard favorite.
