Today I’ll be spotlighting the mangrove. If you’ve been to the southern part of the State, you’ve most likely come in contact with this truly Florida native plant. They’re an essential part of the shoreline ecosystem in that region and as common as pine trees are to our area. The Florida Department of Environmental Protection estimates 600,000 acres of mangrove forests in the State’s coastal zone. If your investigative skills are sharp, you may now find pockets or singular mangrove plants in the Panhandle.
Mangroves are woody trees that live along tropical and subtropical shorelines in either marine or brackish tidal waters. Typically, mangrove distribution has been found between latitudes 25 degrees south to 25 degrees north. There are 80 species known worldwide with 3 species (red, black & white) historically calling south Florida home.
Black Mangrove in St. Joseph Bay. Credit: Ray Bodrey, UF/IFAS Extension Gulf County.
However, warmer ocean waters and more frequent and stronger tropical storm activity has helped the spread of mangrove seed or “propagules”. Mangroves have been slowly migrating northward in Florida, on both the Atlantic and Gulf sides. From the early 1990’s, researchers began to find mangroves in both Cedar Key and Cape Canaveral.
A multi-state partnership to assess mangrove expansion in the northern Gulf of America began in 2018. Sea Grant Agents from the Panhandle of Florida to Louisiana collaborated to conduct field surveys in chosen coastal wetland and estuary zones. More than 500 plants were recorded over a 3-year period with 188 plants found in Florida. The study also confirmed the abundance of black mangrove species due to their ability to withstand light freezing temperatures over red and white mangroves.
Red Mangrove Seedling in St. Joseph Bay. Credit: Ray Bodrey, UF/IFAS Extension Gulf County.
As for their impact on our Panhandle wetland ecosystems, one consistent theme found in the literature is that there are ecological trade-offs for consideration by coastal scientists and natural resource managers (Osland et al, 2022). The benefits of mangroves are broad. Mangroves have been shown to filter runoff, trap carbon in peat, act as a buffer against flooding, improve water quality, and to provide an amazing habitat and food web for invertebrates, fish, terrapins and many bird species. Mangrove range expansion may also affect wetland stability in the face of extreme climatic events and rising sea levels and be used as a shoreline stabilization technique, as taught in the Florida Master Naturalist Program: https://masternaturalist.ifas.ufl.edu/. Mangroves are also a pollinator plant and a favorite of honeybees. Mangrove honey has become a sought-after delicacy for many and a niche crop for south Florida beekeepers. But what about the negatives? Some of the environmental concerns are increased nuisance insects, altered food webs, freeze vulnerability and the economic factor of reduced accesses to fishing areas (Osland et al, 2022).
With mangrove expansion being a relatively new topic, researchers, naturalists and plant enthusiasts alike, will be following the movement with great enthusiasm.
For more information about mangroves, contact your local county extension office.
Reference:
Osland, M. J., Hughes, A. R., Armitage,R., Scyphers, S. B., Cebrian, J., Swinea, S. H., Shepard, C. C., Allen, M. S., Feher, L. C., Nelson, J. A., O’Brien, C. L., Sanspree, R., Smee, D. L., Snyder, C. M., Stetter, A. P., Stevens, P. W., Swanson, K. M., Williams, L. H., Brush, J. M., … Bardou, R. (2022). The impacts of mangrove range expansion on wetland ecosystem services in the southeastern United States: Current understanding, knowledge gaps, and emerging research needs. Global Change Biology, 28, 3163–3187. https://doi.org/10.1111/gcb.16111
Trying to rejuvenate your flower beds can be challenging during these hot days and warm nights. This presents a chance to carefully select and plant varieties that not only endure but thrive in the scorching summer season. Luckily, Florida gardeners have many options, including bulbs. Bulbs are known for their ability to flourish and produce beautiful flowers year after year with proper care. Three of these, Aztec Lily, Walking Iris, and Spider Lily, can be planted during the month of August.
Aztec Lily.
AZTEC LILY
The Aztec Lily, a tender perennial bulb, belongs to the Sprekelia genus in the amaryllis family and is one of only three known species. Among them, Sprekelia formosissima stands out for its striking and showy flowers. Growing from 12 to 36 inches, Aztec Lillies are typically colored from scarlet to deep crimson, though there are also pink and white varieties available. Each bulb has the potential to produce multiple flower stalks annually, usually in sequence rather than all at once. The flowers exhibit bilateral symmetry, resembling the velvety appearance of an orchid. Aztec Lilies should be planted in full shade to part sun and can tolerate acidic and alkaline soil. These plants are incredibly versatile and well-suited for various landscaping purposes, such as mass planting, border decoration, adding accents to garden designs, and attracting butterflies to butterfly gardens.
Walking Iris.
WALKING IRIS
The Walking Iris, Neomarica spp., is a clumping herbaceous perennial, growing to a height of 18 to 36 inches. These plants boast attractive light green leaves and small Iris-like flowers that bloom periodically throughout the spring, summer, and fall seasons. Although the flowers have a short lifespan, they still add a delightful splash of color, making the Walking Iris an interesting addition to any landscape. The Walking Iris thrives in both full and partial shade, making it a versatile choice for your garden. While it can adapt to various soil types, it truly flourishes in moist areas. When grouped together in shady areas, the Walking Iris creates a lovely and eye-catching display. Its upright foliage, coupled with the occasional blooming flower, makes a bold statement in the overall landscape.
SPIDER LILY
Spider Lily.
Native to Florida, the Spider Lily (Hymenocallis latifolia) is a captivating perennial featuring alluring foliage and fragrant white blossoms. This clumping plant exhibits long, dark green leaves that emerge from an underground bulb, gracefully reaching a height of 24 to 36 inches. During the summer and fall seasons, the Spider Lily adorns itself with numerous white flowers, known for their enchanting fragrance, remarkable longevity, and delicate appearance. For optimal growth, place your Spider Lily in either full sun or part shade, and ensure the soil is well-drained. With its rapid growth, the spider lily serves as an excellent ground cover option, spreading its beauty across the landscape. Alternatively, it can be strategically planted in borders or highlighted as a specimen plant, adding charm and elegance to any garden or landscape design.
In the world of flora, the Aztec Lily, Walking Iris, and Spider Lily stand out as captivating gems worth exploring. Each possessing its unique allure and charm, these three species display nature’s diversity and ingenuity. For more information about summer bulbs, contact your local UF/IFAS Extension Office.
Bright color is sometimes hard to come by in landscapes, especially in those areas where not much likes to grow. In particularly sandy areas along our coastlines, it can be a challenge to find plants that can both tolerate extremely dry conditions with heavy salt spray and provide an aesthetic boost. Luckily, there is at least one flower out there that goes above and beyond when it comes to beauty.
Gaillardia pulchella, or blanket flower, Indian blanket flower, firewheel, or sundance is a relatively low growing (up to 1.5 feet tall) plant that favors conditions that would make most plants wither. It grows as an annual or short-lived perennial and though it goes dormant in the winter, during warm weather, it’s bright and colorful! It is native to the United States, but probably never spread farther east than Texas until assisted by humans. It grows well throughout Florida, and can often be seen along roadsides.
Gaillardia on the beach
Spreading to around two feet wide, each individual plant may not blanket the ground, but it readily produces seed which is easy to germinate. Flowers are produced throughout the growing season. Varieties are available with different appearances, though all tend to be some combination of bright yellow and dusky red. The blossoms can be used as cut flowers, or left in the landscape to attract pollinators.
Blanket flower prefers well-drained soil, even growing out into beach dunes. As stated previously, it may be propagated easily by seed; either let dried seed heads remain on the plant long enough to drop seeds or harvest them to plant elsewhere. Sow seeds in the spring and enjoy low-maintenance color for months after!
Since Ponce de Leon first set foot in Florida around Easter in 1513 and gave the state its name – he called it La Florida, which loosely translates to flowery in English – Florida has been known for its amazing native wildflower displays. Florida’s primary native flower shows do indeed occur in the spring (the one observed by Ponce de Leon) and fall, but my favorite Florida “wild” flower is neither a native nor does it bloom in April or October. Rather, the Philippine Lily (Lilium formosanum) does its thing each year in the heat of the summer, when not much else wildflower-wise is blooming.
Hailing from Taiwan and the Philippines but naturalized throughout the Panhandle, the Philippine Lily is easy to spot. Often confused with Easter Lily (Lilium longiflorum), which blooms much earlier in the year, Philippine Lily blooms mid-July to August and sports classic lily-type flowers held high on study stems that may reach 7’ or higher. Emerging from the drab green of the surrounding summer landscape, Philippine Lily’s very large (10” or more), very fragrant, trumpet-shaped, creamy-white flowers are showstoppers. The propensity of the flowers to appear in elegant, “nodding” clusters of a dozen or more also adds to the effect. Admired by gardeners and other passersby during the day, at night these wonderfully scented flowers become a whirring site for evening pollinators, particularly the enormous Hummingbird, or Sphinx Moth.
Philippine Lily in bloom in late July. Photo courtesy of Daniel Leonard.
In addition to being a beautiful surprise in natural areas, Philippine Lily is among the easiest and most versatile of landscape plants to grow. The species prefers partial shade, but the thousands growing along roadsides in full sun speak to its adaptability. It is also right at home in our often dry, sandy Panhandle soils, and no special soil amendments are needed for the species to thrive. To get plants started, one may use either seeds or transplants from existing stands. If using seeds, simply sow them in your desired garden location into loosened garden soil, cover lightly, and water – the same seed sowing method can be used in pots for transplanting or sharing with friends later. Alternatively, you can dig or pull bulbs from natural areas where Philippine Lily already exists – assuming you have permission from the property owner. These newly dug and planted Lilies will need babying with regular water for several weeks to reduce transplant shock and improve survival.
Philippine Lily is probably best sited in the back of landscape beds to take advantage of the plant’s height and display its flowers over lower growing perennials. Siting in the back also allows pre and post bloom Philippine Lily stalks to hide amongst other plants as they don’t add much aesthetically when not in flower. Philippine Lily pairs very well with other low-maintenance summer-blooming perennials like Black-Eyed Susan (Rudbeckia hirta), Garden Phlox (Phlox paniculata), Milkweed (Asclepias spp.), and others.
While not a native wildflower, Philippine Lily certainly adds to North Florida’s reputation as La Florida! They are among the easiest to grow, highest impact “wild” flowers Panhandle gardeners have at their disposal. Enjoy them this summer in natural areas and consider adding a few to your landscape! For more information on Philippine Lily or any other horticultural topic, contact us at the UF/IFAS Calhoun County Extension Office. Happy gardening.
The Pensacola area has had its fair share of rough weather lately. While the recent storms were not hurricanes, the rainfall totals rivaled many tropical storms, and the lighting and wind were disastrous. A tornado caused significant damage, including a tragic death, with more tumultuous weather in the forecast. Our rainy hurricane season has just begun, so it is worth talking about tree selection, management, and preparing for storms.
After the busy 1992, 1995, 1998, and 2004-05 hurricane seasons, several University of Florida researchers undertook an exhaustive on-the-ground project to look at tree damage statewide. Their goal was to determine which species survived high winds, and which trees were the most vulnerable during storms. Their findings were consistent, and have held up over the past few decades. A full description of the project can be found online, along with several publications that go over proper pruning and maintenance of trees, both before a storm and after recovery.
Live oaks have dense wood and are extremely wind-resistant species. Photo credit: Carrie Stevenson, UF IFAS Extension
This chart developed by UF researchers denotes the percentage of trees surviving Hurricane Ivan, by species. Courtesy M. Duryea and E. Kampf
Live oaks, and sand live oaks (which live on coastal sand dunes) are slow-growing trees with extraordinarily dense wood. This protects them in hurricane-force winds. Part of the working theory on why bald cypress, holly, and magnolia do well in storms is their pyramidal shape, which seems to allow wind to whip circularly around the trees and avoid damage. Sabal palms are botanically considered part of the grass category and not trees, so their single, flexible trunk allows them to handle the onslaught of wind. Sweetgums are particularly hardy in tornadoes, due to their sturdy root system and shorter, “stout” branches. Smaller understory trees like crape myrtle and dogwood are likely dodging the strongest winds, but also have strong branch structures and dense wood. These two species, along with sand live oak, also lost an average of more than 80% of their leaves. This defoliation is an adaptation to heavy winds, with trees that lost leaves performing better overall than species that held onto their leaves but toppled at the trunk.
Significant damage to a home after a tornado struck Pensacola in 2016. Photo credit: Carrie Stevenson, UF IFAS Extension
Another list of tree survivability was developed for residents in tropical and subtropical regions of the state. If you have friends or family in south-central Florida, be sure to share this information with them.
Besides planting wind-resistant species, the research team shared other observations related to tree planting and arrangement, too. Single trees are more vulnerable than trees planted in clusters, as they protect each other from incoming winds. Older trees, and those with preexisting damage, are more likely to fall. Trees with plenty of space around their roots do better—if a tree is surrounded on two or more sides with buildings or other hard surfaces, they cannot spread adequately. Detailed information on identifying damaged or poorly structured trees, along with maintenance and pruning tips, can be found in the “Urban Forest Hurricane Recovery Program” series of articles written by the UF tree specialists involved in the studies. The publications include good diagrams and photos of specific examples.
Like finding buried treasure on a desert island, walking up on a mound of sandhill milkweed (Asclepias humistrata) may elicit cries of excitement from someone who understands what they’re seeing. And not unlike searching for pirate booty, there’s a bit of danger involved, too—milkweed is highly toxic.
The eye-catching pink coloration of the leaves, stems, and complex flowers make this variety of milkweed stand out among the dunes. Photo credit: Carrie Stevenson, UF IFAS Extension
Last month in the dunes of Perdido Key, our Master Naturalist class found robust clusters of eye-catching, pink-tinged leaves, blooms, and buds of sandhill milkweed. Also known as pinewoods milkweed, this variety thrives in dry, sandy soils. It is native to the southeast, found typically in the wilds of Alabama, Mississippi, Louisiana, Georgia, Florida, South Carolina, and North Carolina. Its genus name, “Asclepias” refers to the Greek god of healing—indigenous people have used the plant for medicinal purposes (dysentery treatment and wart removal, in particular) for centuries. The species name humistrata means “spreading,” which describes the growth habit of the plant. Milkweed is highly toxic, so we do not recommend trying any medicinal uses at home! The “milk” part of the common name refers to its sap, which is a thick, sticky, white substance containing that toxic chemical.
The seedpods of sandhill milkweed are large and full of seeds with wispy fibers that allow them to float through the air for dispersal. Photo credit: Gabriel Campbell, UF/IFAS
As the only food source for the monarch caterpillar, healthy milkweed plants are crucial for maintaining populations of the famous monarch butterfly. The plant itself is rather complex and beautiful. Its five-petaled blooms grow in tight clusters, on stalks sticking several inches off the ground. The leaves are broad and a deep forest green, edged in the pale maroon/pink of the stems and flowers. The seedpods of milkweed are quite large (3-6” long), resembling pea pods and full of seeds. Each seed has a wispy white fiber attached, which helps it disperse in the wind like a dandelion. The fibers have been used for years as stuffing for pillows and mattresses, and were used for life jackets during World War 2.
Numerous monarch caterpillars feed on a sandhill milkweed plant. Photo credit: Carrie Stevenson, UF IFAS Extension
The first cluster of milkweed we found was host to multiple monarch caterpillars, recognizable by their greenish-yellow, white, and black stripes. By the time you see caterpillars, the milkweed is already working its magic, transferring its toxins to the insects but causing them no harm. Monarchs have evolved the capability to digest and metabolize this poison, which would induce heart attacks in nearly any vertebrate animal. Adult monarchs use several nectar sources, including milkweed flowers, and females lay their eggs on the plant so that their young can begin eating once hatched.
In the animal kingdom, red and orange are signs of danger. The bright orange coloration of an adult monarch butterfly serves as a warning to would-be predators to exhibit caution, as the toxins from their food sources stay within the butterfly’s body. The copycat viceroy, soldier, queen, and Gulf fritillary butterflies benefit from this trait by using mimicry in their own orange coloration to ward off predators.
