I am often accused of using descriptive adjectives more typically reserved for people when discussing plants. Terms like handsome, attractive and elegant frequently roll of my tongue, along with far less complimentary terms on occasion. On the other hand, terms like eloquent, ethereal and graceful are words I typically do not use to describe a plant. However, I do believe they are the perfect adjectives to describe the Fringe Tree, botanically named Chionanthus virginicus, especially while it is covered with its fleecy white flowers of spring.
Fringe Tree is a member of the Oleaceae or Olive Family. The genus includes nearly 150 species, almost all of which are evergreen and native to tropical regions of the world. Chionanthus virginicus is native from NJ south to Florida and West to Oklahoma and Texas. The genus name was originally penned by the Swedish Botanist Carl Linnaeus in 1753; inspired by the snowy white flowers, he crafted the genus from the Greek Chion for snow and Anthos for flower. Linnaeus also provided the species epithet and described the plant in 1753. The species name refers to the colony of Virginia, which in 1753 not only included the current state of Virginia, but also the regions now known as Kentucky, Indiana, Illinois and portions of Ohio and Western Pennsylvania.
In general, Chionanthus virginicus is slow growing, appearing naturally in moist woodlands along stream banks and in exposed rocky glades. It frequently appears as a multi-stemmed shrub, reaching 15-20 feet tall and slightly wider, as pictured at right in the Morris Arboretum. However, under perfect conditions, they can reach heights of 30 feet by equal or greater widths. Depending upon the year and location, the white flowers that inspired the name can appear in late April, although May into early June is more typical for NJ. The floral display lasts for upwards of 2 weeks and looking up into a canopy of the pendant flowers can be a very transformative moment for the gardener! The flowers emerge from buds at the base of the leaves or leaf axils and freely dangle along the stems. The flowers are arranged in panicles, which have a central stem with three-flowered clusters radiating outwards along this stem. The overall panicle ranges from 4-10 inches long and up to 6 inches wide. The plants are dioecious, with individual plants having all male or all female flowers, a trait certain species adopted to prevent self-pollination and inbreeding depression. The individual flowers consist of 4-6 strap-like lobes or petals that are up to 1 inch long on the female and slightly longer on the male flowers, by 1/16” wide (as pictured at right).
The flowers are wonderfully fragrant and give the plant a very appealing lacy or fringe-like appearance that gave rise to its common name. In some regions the plant is also called Old Man’s Beard, since the dangling panicles resemble a frothy white beard! The male flowers have 2 stamens that aid in making the flowers appear showier, while the female flowers have a single central stigma. Although the male flowers may be showier, it is the female flowers that develop clusters of blue to purple fruits come September. The fruits are technically called a drupe, with each containing a single large central seed. The drupes are much beloved by birds and are a good reason for not planting a clonal mass of simply the showier male selections. The fruits are equally vital to the garden, if not more so, for their attractive display and provisions provided for wildlife (pictured below in late November).
The foliage appears with the flowers and is positioned such that it nicely compliments rather than hides the blossoms. The leaves are a dark, glossy green, measuring 4-6 inches long by 2 inches wide and transform to an attractive golden yellow come fall, especially if the plant is located in full sun (pictured below at the end of the article). The bark is a smooth gray on young stems, maturing to a ridge and furrowed or occasionally a warty appearance on older specimens.
The other commercially available and hardy species for North American gardens is Chionanthus retusus, the Chinese Fringe Tree. Native to China, Korea and Japan, it too grows as a multi-stemmed large shrub, reaching 10-20 feet tall and wide. It can also appear as a single stemmed small tree, whereby it can reach heights of 30 feet tall. Individual plants are often genetically oriented to their ultimate form, although training will have some impact on whether they assume a shrub or tree habit. Chionanthus retusus was originally brought to Europe in 1845 by the Scottish botanist and plant hunter Robert Fortune (1812-1880) with a second specimen appearing prior to 1860 from the English botanist and plant collector Charles Maries (1851-1902). The species epithet is from the Latin Retundere, meaning to pound back or blunt. A retuse leaf has a rounded apical tip with a v-shaped notch, which describes the foliage of many plants with their rounded, glossy green leaves that are up to 4 inches long and 3 inches wide. Interestingly, some plants have elliptical foliage that comes to a point. The leaves also have a thick almost leather-like texture. The plant was named and described in 1852 by two individuals: the English botanist and orchid enthusiast John Lindley (1799-1865) and the English Gardener and Architect Joseph Paxton (1803-1865). The foliage is much more frost tolerant than its North American cousin, with the foliage remaining green through a number of heavy November frosts. During most autumns in the north, the foliage drops while still green in late November, but in more southern gardens the foliage will change to a buttery yellow.
Chionanthus retusus also has dioecious flowers. The flowers differ from their North American cousin by being erect and produced from the apical buds at the tips of the branches. Although the panicles are smaller, only reaching 2-3 inches long and as wide, the petals are wider, reaching from ⅛ to nearly ¼ inch wide (as seen below). The wider petals combined with the apical positioning of the flowers provides for a more dense and brilliant floral display (pictured at left), which is attractive yet not quite as ethereal as its cousin in my opinion. 
The bark is showier on this species, as the younger stems are cinnamon brown in color with small waves of peeling bark running the length of the stems. Over time, the bark matures to a dark brown and gradually becomes ridge and furrowed.
If space is restricted and a more columnar form is needed, consider Chionanthus retusus ‘Tokyo Tower’ (pictured below). It slowly matures to 20’ tall by 8’ wide. The plant pictured below was planted 12 years prior to the picture being taken, when it measured a more humble 4-5’ in height! The form is decided upright and once again it yields an attractive floral display. The plant is female and produces an attractive fruit set in the fall, providing a male plant is within a pollinators reach.
Both species of Fringe Tree perform admirably in full sun or light shade and are very adaptable to a broad range of soil types and pH. I have seen large specimens of Chionanthus retusus planted near busy roadways where they are subject to significant amounts of road salt throughout the winter without any noticeable impact. The American Fringe tree is hardy to zone 3 and while the Chinese Fringe Tree is only hardy to zone 5, they are both suitable for NJ gardens. The one issue to consider and keep an ever watchful eye out for is Emerald Ash Borer, as both species are susceptible.
Eloquent and graceful, Chionanthus is certainly a plant that has been overlooked too long in the gardening world. It is very easy to grow and, providing you have chosen seedling diversity, you will not only have an attractive spring floral display, but a late autumn display of fruits complimented by our foraging winged friends. What more could a gardener ask?
Bruce Crawford
Program Leader in Home and Public Horticulture
or just receive a light pruning if the flowers are dense with sterile florets. Purple and Golden Smoke Bush should be cut back to 6-12” to provide optimum foliage color, although such treatment will sacrifice summer blooms. Red or Golden Stemmed Dogwoods and Willows should be cut back to 6” or less every 2-3 years to encourage new shoots to develop, which will sport the best red or gold stem color. Have had great success with cutting red stemmed willows (Salix alba ‘Britzensis’) back annually. Vitex (Chaste Tree) can be cut back hard (to 12”) or moderately (3’), depending upon how tall you wish the plant to grow in your Garden – obviously, the less you cut it back, the taller the plant will grow this season.
The most common species planted in Gardens, and very deservedly so I might add, is Galanthus nivalis. This species is also the type species for the genus, against which all species are evaluated and compared. This species was also named by Linnaeus in 1753, with the species epithet coming from the Latin meaning ‘of the snow’ or ‘snow-covered’. Typical to the genus, each bulb produces two linear leaves that ultimately grow to 6-8” long. The flower scape emerges from in-between the leaves when they are merely 1-2” tall as seen at left. The flower scape ultimately stretches to 6-8” tall as well and terminates in what appears like a shepherd’s crook, with the flower dangling from the center of the crook (see image below of Galanthus elwesii). When the flower initially emerges from between the leaves, the bud is held upright and is enclosed by a protective leafy bract or spathe. The spathe consists of two modified leaves called spathe valves and two transparent membranes. The spathe valves are located on either side of the flower bud and appear as slender green lines, as seen in the image above.
The two transparent membranes are connected to the spathe valves and wrap around the bud. As the bud expands, the membranes split open and fall away, while the 2 spathe valves elongate and curl downward, forming the ‘shepherd’s crook’, as the image of Galanthus elwesii depicts at right. As the spathe valves elongate, the flower bud transitions from an upright bud to a dangling flower, located near the center of the spathe valves. An incredible ‘dance’ and fun to watch evolve if time permits!
The compressed growing period pressures the genus to produce as many carbohydrates as possible for generating seed and developing new bulbs for the following year. Albeit small, these green markings aid in the production of the needed sugars! Interestingly, the foliage and tepals also contain small air-filled spaces that allow the flowers to tolerate subfreezing temperatures as they begin to bloom. The globe shaped ovary is located above the tepals, with the small black seeds maturing in mid to late May. The seeds have an attached lipid rich structure called an elaiosome, which not only feeds and attracts ants, but serves as a means of seed dispersal.
Another readily available species is the formerly mentioned Galanthus elwesii. The plant resembles its cousin in all aspects except it is larger with the outer tepals reaching an inch or longer in length. They are often the first species to emerge and feature green markings on both the upper and lower ends of the inner tepals. They can even be connected, as seen at right. The larger outer tepals results in a flower upwards of 2” in diameter when fully open! The species honors the British botanist and entomologist Henry John Elwes (1846-1922), who came across a mass of large flowered Snowdrops in 1874 while botanizing in the mountainous regions near Smyrna, Greece. In 1875, the English botanist Dalton Hooker (1817-1911) honored Elwes with the species epithet. Interestingly, the plant that Elwes found was actually a previously described species named Galanthus gracilis and Hooker’s species name was used to describe another, as of yet unnamed large flowered species! 
Another delicate and very attractive species is Galanthus ikariae. Named by John Gilbert Baker (1834-1920) in 1893, it is native to several Greek islands in the Aegean Sea, including the island of Ikaria for which it is named. If the island’s name sounds familiar, it is named after Icarus, who in Greek legend escaped from King Minos by fabricated wings from feathers connected by wax. When he flew too close to the sun, the wax melted and he fell to earth. Legend has it he was buried on this island that bears his name! This species bears smaller pendant flowers to 1” long and a single green mark on the tips of the inner, bi-lobbed tepals (pictured at right). Often, this green mark will extend half way or further up these tepals. The foliage is glossy and more attractive than the mat-green forms, growing to 6-8” tall. Not ideal for plugging into turf since the reflective foliage does not blend well with turf grass. In the wild, the plant is often found in river valleys, growing with Cyclamen hederifolium in deep humus rich soils. It has also been found in upland gravely soils in scrubby growth. The plant is somewhat less winter hardy, but I have not had any issues in over 30 years of growing the plant. Unfortunately, it does not appear to naturalize as readily as other species.
With the chilly temperatures of winter well entrenched in our Gardens, evergreen foliage clearly plays an important role in providing interest at this time of the year. Conifers serve an important role in providing the bones for the garden, but there is still a need for detail plantings as we walk about our walkways and paths. One plant I have enjoyed using over the past 30 years for winter foliage and form, as well as for its ‘hot’ flowers come spring is the Italian Arum, Arum italicum.
Typical to the genus, Italian Arum grows from a tuber, with the sagittate or arrow-shaped foliage beginning to emerge in late September or early October and typically remaining attractive until the following June (photo at right was taken on February 10th). During severe winters, the foliage can scorch if located in an exposed location, but fret not as it will be refreshed with new foliage come spring. The straight species features glossy, deep green foliage or foliage with white splotches while the previously mentioned subspecies is laced with white venation. The leaves usually grow to 12” tall by 6-8” wide, but can be larger if conditions are ideal. The foliage certainly provides great winter interest, but come spring, it is the flower that makes the plant all the more fascinating!
Arum flowers are termed protogynous, whereby the female flowers mature first and are no longer receptive to pollen when the staminate flowers mature and begin to release pollen. This staged maturation prevents the flowers from self-pollinating, resulting in inbreeding depression. To further aid in pollination, the male flowers are thermogenic, whereby they actually go through periods of releasing heat and can become upwards of 50 degrees warmer than the ambient air! Initially, this makes little sense, until one realizes that the flowers are pollinated by flies and the heating of the flowers releases volatile chemicals that smell like rotting meat or even stale urine! None to worry though, since the odors are too faint to be noticed by the passing gardener. Attracted by the odor, small flies are able to push past the filaments of the staminode flowers in search of the source of the odor but, due the slightly downward orientation of the filaments, the flies are not able to escape. The filaments remain resilient against any attempts of escape for around 24 hours, allowing the incarcerated the flies to hopefully deposit pollen from a previously visited flower onto the stigmas. After one day passes, the stigmas become unreceptive to pollen while the staminate flowers begin to shed pollen and the staminode filaments become limp, allowing the pollinators to collect pollen as they move upward and out of the spathe tube. An incredible scenario!
