Throughout history the evergreen tree has been a symbol of life. “Not only green when summer’s here, but also when it’s cold and dreary” as the Christmas carol “O Tannenbaum” says. After such devastating tree losses in the Panhandle this year, this winter is a prime time for installing more native evergreens.
While supporting the cut Christmas tree industry does create jobs and puts money into local economics, every few years considering adding to the urban forest by purchasing a living tree. Native evergreen trees such as Redcedar make a nice Christmas tree that can be planted following the holidays. The dense growth and attractive foliage make Redcedar a favorite for windbreaks, screens and wildlife cover. The heavy berry production provides a favorite food source for migrating Cedar Waxwing birds. Its high salt-tolerance makes it ideal for coastal locations. Their natural pyramidal-shape creates the traditional Christmas tree form, but can be easily pruned as a street tree.
Two species, Juniperus virginiana and Juniperus silicicola are native to Northwest Florida. Many botanists do not separate the two, but as they mature, Juniperus silicicola takes on a softer, more informal look. For those interested in creating a different look, maybe a Holly (Ilex,sp.) or Magnolia with full-to-the-ground branches could be your Christmas tree.
When planning for using a live Christmas tree there are a few things to consider. The tree needs sunlight, so restrict its inside time to less than a week. Make sure there is a catch basin for water under the tree, but never allow water to remain in the tray and don’t add fertilizer. Locate your tree in the coolest part of the room and away from heating ducts and fireplaces. After Christmas, install the new tree in an open, sunny part of the yard. After a few years you will be able to admire the living fence with all the wonderful memories of many years of holiday celebrations. Don’t forget to watch for the Cedar Waxwings in the Redcedar.
As the trees begin to turn various shades of red, many people begin to inquire about the Popcorn trees. While their autumn coloration is one of the reasons they were introduced to the Florida environment, it took years for us to realize what a menace Popcorn trees have become. Triadica sebifera, the Chinese tallowtree or Popcorn tree, was introduced to Charleston, South Carolina in the late 1700s for oil production and use in making candles, earning it another common name, the Candleberry tree. Since then, it has spread to every coastal state from North Carolina to Texas, and inland to Arkansas. In Florida it occurs as far south as Tampa. It is most likely to spread to wildlands adjacent to or downstream from areas landscaped with Triadica sebifera, displacing other native plant species in those habitats. Therefore, Chinese tallowtree was listed as a noxious weed by the Florida Department of Agriculture and Consumer Services Noxious Weed List (5b-57.007 FAC) in 1998, which means that possession with the intent to sell, transport, or plant is illegal in the state of Florida. The common name of Florida Aspen is sometimes used to market Popcorn tree in mail-order ads. Remember it’s still the same plant.
Although Florida is not known for the brilliant fall color enjoyed by other northern and western states, we do have a number of trees that provide some fall color for our North Florida landscapes. Red maple, Acer rubrum, provides brilliant red, orange and sometimes yellow leaves. The native Florida maple, Acer floridum, displays a combination of bright yellow and orange color during fall. And there are many Trident and Japanese maples that provide striking fall color. Another excellent native tree is Blackgum, Nyssa sylvatica. This tree is a little slow in its growth rate but can eventually grow to seventy-five feet in height. It provides the earliest show of red to deep purple fall foliage. Others include Persimmon, Diospyros virginiana, Sumac, Rhus spp. and Sweetgum, Liquidambar styraciflua. In cultivated trees that pose no threat to native ecosystems, Crape myrtle, Lagerstroemia spp. offers varying degrees of orange, red and yellow in its leaves before they fall. There are many cultivars – some that grow several feet to others that reach nearly thirty feet in height. Also, Chinese pistache, Pistacia chinensis, can deliver a brilliant orange display.
Young Trident maple with fall foliage. Photo credit: Larry Williams
There are a number of dependable oaks for fall color, too. Shumardi, Southern Red and Turkey are a few to consider. These oaks have dark green deeply lobed leaves during summer turning vivid red to orange in fall. Turkey oak holds onto its leaves all winter as they turn to brown and are pushed off by new spring growth. Our native Yellow poplar, Liriodendron tulipifera, and hickories, Carya spp., provide bright yellow fall foliage. And it’s difficult to find a more crisp yellow than fallen Ginkgo, Ginkgo biloba, leaves. These trees represent just a few choices for fall color. Including one or several of these trees in your landscape, rather than allowing the Popcorn trees to grow, will enhance the season while protecting the ecosystem from invasive plant pests.
For more information on Chinese tallowtree, removal techniques and native alternative trees go to: http://edis.ifas.ufl.edu/ag148.
Lantana, on the left, and Mexican Petunia, on the right, are both exotic invasive plants which can displace many native species and disrupt the natural balance.
Autumn is usually considered the season of colors in the natural parts of north Florida, and other locations in North America. This tonal attribute is commonly credited to the foliage changes as the growing season ends.
Maples, sweet gums, hickory and many others make their contributions to the natural palette of shades and hues which have existed since long before human habitation in the area. Even some of the native plants add to the display.
Goldenrod and dogfennel add highlights to the brilliant display as winter, believe it or not, approaches. Unfortunately there are some attractive shades in the exhibition which are an indication of exotic invasive plants which have pushed out native.
Both lantana and Mexican petunias are currently blooming, but an indication of problem species. Both were introduces as ornamental plants, but quickly escaped into the wild where they could colonize unchecked.
Lantana (Lantana camara) is a woody shrub native to tropical zones of North and South America. It flowers profusely throughout much of the growing season.
Because of the plant’s ornamental nature, many different flower colors exist, but the most frequent color combinations are red and yellow along with purple and white. Lantana is now commonly found in naturalized populations throughout the southeastern United States from Florida to Texas.
It is currently ranked as one of the top ten most troublesome weeds in Florida and has documented occurrences in 58 of 67 counties. Curiously, despite the bad reputation it is still found in home and commercial landscapes.
As part of its arsenal of conquest, Lantana produces allelochemicals, or plant toxins, in its roots and stems. These allelochemicals have been shown to either slow the growth of other plants or totally remove them.
Some of these same chemicals give lantana an acrid taste and deter insects or other animals from consuming the leaves. Of importance to pet and livestock owners, these leaf toxins are damaging to animals.
If animals consume the leaves, they often begin to show symptoms of skin peeling or cracking. Once animals show these symptoms, there is little or no treatment that can reverse the process.
Although lantana’s leaves are poisonous, its berries are not. Birds readily consume the fruit and are responsible for much of the seed’s distribution over wide areas.
Mexican petunia (Ruellia simplex) is a native of Mexico, but also the Antilles and parts of South America. Its tolerance of varying landscape conditions makes it a common choice for difficult to plant areas and has contributed to it popularity and wide use.
Mexican petunia tolerates shade, sun, wet, dry, and poor soil conditions. It is a prolific bloomer with flowers in shades of purple and pink peaking in the summer, but with the potential to also bloom in spring and fall in some parts of Florida.
Environmental tolerance, abundant seed production, and an ability to easily grow from plant cuttings have all promoted the spread into natural areas bordering developments. The Mexican petunia has been credited with “altering native plant communities by displacing native species, changing community structures or ecological functions, or hybridizing with natives” according to the Florida Exotic Pest Plant Council in 2011.
Given the continued popularity of both species, plant breeders have developed sterile, non-reproducing cultivars which do not have the negative characteristics of these problem plants. It is recommended using only the sterile type so autumn’s colors continue to be natural.
To learn more about north Florida’s colorful invasive plants, contact the local UF/IFAS County Extension Office. Click here for contact information.
Having just completed the Okaloosa/Walton Uplands Master Naturalist course, I would like to share information from the project that was presented by Ann Foley.
The Florida Torreya. Photo provided by Shelia Dunning
The Florida Torreya is the most endangered tree in North America, and perhaps the world! Less than 1% of the historical population survives. Unless something is done soon, it may disappear entirely! You can see them on public lands in Florida at Apalachicola Bluffs and Ravines Preserve and beautiful Torreya State Park.
The Florida Torreya (Torreya taxifolia) is one of the oldest known tree species on earth; 160 million years old. It was originally an Appalachian Mountains ranged tree. As a result of our last “Ice Age” melt, retreating Icebergs pushed ground from the Northern Hemisphere, bringing the Florida Torreya and many other northern plant species with them.
The Florida Torreya was “left behind” in its current native pocket refuge, a short 40 mile stretch along the banks of the Apalachicola River. There were estimates of 600,000 to 1,000,000 of these trees in the 1800’s. Torreya State Park, named for this special tree, is currently home to about 600 of them. Barely thriving, this tree prefers a shady habitat with dark, moist, sandy loam of limestone origin which the park has to offer.
Hardy Bryan Croom, Botanist, discovered the tree in 1833, along the bluffs and ravines of Jackson, Liberty and Gadsen Counties, Florida and Decatur County in Georgia. He named it Florida Torreya (TOR-ee-uh), in honor of Dr. John Torrey, a renowned 18th century scientist.
Torreya trees are evergreen conifers, conically shaped, have whorled branches and stiff, sharp pointed, dark green needle-like leaves. Scientists noted the Torreya’s decline as far back as the 1950’s! Mature tree heights were once noted at 60 feet, but today’s trees are immature specimens of 3-6 feet, thought to be ‘root/stump sprouts.’
Known locally as “Stinking Cedar,” due to its strong smell when the leaves and cones are crushed, it was used for fence posts, cabinets, roof shingles, Christmas trees and riverboat fuel. Over-harvesting in the past and natural processes are taking a tremendous toll. Fungi are attacking weakened trees, causing the critically endangered species to die-off. Other declining factors include: drought, habitat loss, deer and loss of reproductive capability.
With federal and state protection, the Florida Torreya was listed as an endangered species in 1983. There is great concern for this ancient tree in scientific community and with citizen organizations. Efforts are underway to help bring this tree back from the edge of extinction!
Efforts include CRISPR gene editing technology research being done by the University of Florida Dept. of Forest Resources and Conservation- making the tree more resistant to disease. Torreya Guardians “rewilding and “assisted migration”. Reintroducing the tree to it’s former native range in the north near the Biltmore Estate in Asheville, NC, which has maintained a grove of Torreya trees and offspring since 1939 and supplying seeds for propagation from their healthy forest. Long before saving the earth became a global concern, Dr. Seuss (Theodor Seuss Geisel), spoke through his character the Lorax warning against urban progress and the danger it posed to the earth’s natural beauty. All of these groups, and many others, hope their efforts will collectively help bring this tree back from the brink!
The Florida Master Naturalist Program is an adult education University of Florida/IFAS Extension program. Training will benefit persons interested in learning more about Florida’s environment or wishing to increase their knowledge for use in education programs as volunteers, employees, ecotourism guides, and others.
Through classroom, field trip, and practical experience, each module provides instruction on the general ecology, habitats, vegetation types, wildlife, and conservation issues of Coastal, Freshwater and Upland systems. Additional special topics focus on Conservation Science, Environmental Interpretation, Habitat Evaluation, Wildlife Monitoring and Coastal Restoration. For more information go to: http://www.masternaturalist.ifas.ufl.edu/ Okaloosa and Walton Counties will be offering Upland Systems on Thursdays from February 15- March 22. Topics discussed include Hardwood Forests, Pinelands, Scrub, Dry Prairie, Rangelands and Urban Green Spaces. The program also addresses society’s role in uplands, develops naturalist interpretation skills, and discusses environmental ethics. Check the website for a Course Offering near you :http://conference.ifas.ufl.edu/fmnp/
The lodge at Camp Helen State Park was the perfect backdrop for the Coastal Dune Lake Seminar Series Water School. Brandy Foley of the Choctawhatchee Basin Alliance shares her paleolimnology research work on the lakes.
On a beautiful October day, 35 people gathered at the Camp Helen State Park lodge to share information about the rare Coastal Dune Lakes (CDLs) that line the coast of Walton and Bay Counties. Organized by the University of Florida Extension Programs in Bay and Walton counties, the Water School included a morning seminar series featuring speakers from various groups that work together to support the lakes. Laura Tiu, Sea Grant Agent for Walton and Okaloosa counties started off the day giving a broad overview of the history and ecology of the lakes. Brandy Foley of the Choctawhatchee Basin Alliance shared her research on the paleolimnology, or study of the lake sediments over time, of two coastal dune lakes. Clayton Iron Wolf, a ranger at Camp Helen, gave a summary of the importance of Lake Powell and its benefit to the park. Jeff Talbert of the Atlanta Botanical Garden thrilled attendees with his pictures and research on the Deer Lake State Park restoration project. Norm Capra, who wears many hats, including that of the Lake Powell Community Alliance and Friends of Camp Helen State Park, shared the work they have done promoting conservation of shorebirds there. Dr. Dana Stephens, Director of the Mattie Kelly Environmental Institute at Northwest Florida State College shared analyses of many years of water chemistry and quality data collected on the lakes. Melinda Gates, Environmental Specialist for Walton County, wrapped up with a presentation on the efforts to protect and preserve the lakes.
The attendees seemed pleased with the event with one hundred percent of attendees rating the quality of information presented, usefulness of information, speakers’ knowledge, overall value of the program, and quality of location as good or excellent. The seminar helped attendees identify important roles of the CDLs in the ecosystem and understand why it is important to protect them. Several participants plan to make behavior changes based in the workshop including: joining or volunteering with Choctawhatchee Basin Alliance, Audubon, Sierra Club or Lake Watch Volunteers; sharing the information; living minimally; and engaging in activism. The seminar was followed by a kayak tour lead by Scott Jackson, Bay County Sea Grant Agent, to the outflow of Lake Powell and a visit to a faux sea turtle nest demonstration by Florida Fish and Wildlife Commission. This Water School was part of a regional series offered by UF/IFAS Extension. For more information on future schools, please subscribe to our Panhandle Outdoors Newsletter.