This week for Flora and Fauna Friday, we’re looking at a migratory bird that flocks to our area every winter. A golden-amber squeaky socialite; a crested berry bandit with Crayola crowned feathers. This week we’re taking a quick look at the Cedar Waxwing (Bombycilla cedrorum).
Cedar Waxwings are a medium sized songbird. They are a striking and unmistakable species. Their plumage is a blend of amber brown, golden yellow, shale gray, and snow white. The birds sport a black mask, prominent crest, bright yellow tipped tail feathers, and red waxy tips to their secondary wing feathers. Their call is a short high pitched whistle and buzz. Their whistle is very reminiscent of a distant, squeaky brake pad. (So much so that I’ve often wondered how many brake pads have been officially recorded as Cedar Waxwings during ornithological surveys.)
Like many bird species, Cedar Waxwings visit our state in the winter in search of food and warmth. They typically travel in flocks of a half dozen to several dozen birds, but rarely alone. They can usually be found perched at the tops of hardwood trees or feeding in fruit bearing trees and shrubs. Cedar Waxwings are one of the few birds in our area that feed almost exclusively on fruit. Around here you can typically find them gorging themselves on the berries of Holly, Privet, Dogwood, Cherry, Honeysuckle, Crabapple, Mistletoe, Pyracantha, and, of course, Redcedar. As their straightforward common name implies, the fruits of the Eastern Redcedar make up a large part of their diet. They also eat insects when available. Their active life style, migratory nature, and fruit based diet puts Waxwings in an interesting ecological role. They are an important distributor of plant seeds. They eat fruits whole at one location and pass the undigested seeds off at another location. The species of trees and shrubs they feed on recognize this and have brightly colored, sugar-filled fruits to entice birds into eating them. It’s a symbiotic relationship. Birds get to eat, plants get to spread their offspring far and wide, and the newly established offspring become new stop over sites for the birds during migration. A win-win. This dispersal is also important to how ecosystems recover from disturbances or changes in environmental conditions by returning old plants or introducing new ones to a degraded habitat. However, this also means that Waxwings are the primary disperser of some aggressively invasive exotic species. Species like Privets, Honeysuckles, and Eleaegnus are primarily spread to new habitats by birds like Waxwings, Robins, and Catbirds. There the seeds lie dormant in the soil until a disturbance creates a gap in the canopy and the invasives can establish. Adaptations like this can become a double-edged sword. What was originally a behavior that promoted biodiversity can quickly result in the opposite once an exotic species is able to exploit the system.
This week for Flora and Fauna Friday, we’re discussing a unique little nocturnal rodent native to the eastern US. We’re talking about the Southern Flying Squirrel (Glaucomys volans).
Southern Flying Squirrels are fairly small, reaching about 9 inches in length. Making them about the same size as a Cotton Rat. They have large bug eyes, a flat fluffy tail, and, of course, those flaps of skin between its legs that let it glide. Flying Squirrels can’t fly, like how a bat does, but they can glide rather well. They use their body as a parachute and their tail as a rudder. Flying Squirrels live in similar habitats to the regular old Gray Squirrel and have similar diets and life histories. Flying Squirrels inhabit hardwood or mixed forests. Being smaller, they are more omnivorous than Gray Squirrels. Their size limits their ability to access the more difficult nuts to crack. They eat nuts, berries, acorns, insects, and will even raid bird nests. They are cavity nesters and use old Woodpecker cavities for their nests. The one in the photos below has taken to nesting in one of my Bluebird boxes.
Flying Squirrels are nocturnal and their big eyes allow them to navigate the treetops at night. Flying Squirrels, like most mammals, have a structure called the tapetum lucidum. This is a specialized reflective structure in the eye that allows for improved night vision. This is the same thing that gives your cat or dog glowing green eyes at night. Flying squirrels have reddish-orange eyeshine. Humans lack this structure, so our eyes don’t reflect light at night. This structure is basically a mirror behind the retina within the eye. The retina is not perfectly efficient at sensing light and some will pass through undetected, only to be absorbed by the back of the eye. What the tapetum lucidum does is reflect this lost light back through the retina. This gives the animal’s retina a second opportunity to sense that light. Any light that is not “seen” this second time comes back out through the cornea. This reflected light is what we see as eyeshine.
The scientific name, Glaucomys volans, like other species we’ve discussed, tells us a little bit about the species. The specific epithet “volans” is Latin for flying. Pretty straight forward. The genus “Glaucomys” is a compound word with glauco meaning blue-gray or silvery and mys meaning mouse. Also straight forward. So, this species is simply named “flying gray mouse”. Flying Squirrels are very common in the hardwood forests of our area. However, due to those big eyes, they are entirely nocturnal. This makes them hard to and many people have never seen one. Luckily, this time of year is the best time to find one. Flying squirrels are rather vocal in the winter as they are gearing up for their winter breeding season. I hear them in the woods every week. They emerge once the sun has fully set and will begin call to each other, especially if they think you’re trespassing under their trees. They make a repetitive series of very high-pitched squeaks and when these squeaks come from 20ft up a tree, there’s no mistaking who’s making them.
This week for Flora and Fauna Friday were taking a look at a clade of seabirds that are best represented on Edisto in the Winter. We’re talking about the Gulls.
First things first, the term seagull is not linked to any taxonomic designation. The proper term is just Gull. It’s semantics but that’s why I use the term Gull instead. Gulls are members of the family Laridae. This family includes Terns, Skimmers, Noddies, and Gulls. I’ll just be talking about Gulls, and only the 6 most common species in our area. Those species are the: Laughing Gull, Ring-billed Gull, Herring Gull, Bonaparte’s Gull, Lesser Black-backed Gull, and Great Black-backed Gull. I’ll spare you the Latin, this time.
Gulls are equally at home in the air, on the water, and on the ground They typically stay close to tidal systems, hence why people call them seagulls. Gulls can be quite challenging to identify because they take several years to reach sexual maturity and many have distinct winter and summer molt patterns. At each molt on their way to maturity, their feathers take on a new pattern that incrementally comes closer to that of the adult. These immature molt patterns can look remarkably similar across species, and without a size reference, can make ID difficult, even for seasoned birders. Gulls are opportunistic omnivorous seabirds that will eat anything that suits their fancy. They are primarily carnivorous and will hunt fish, crabs, shrimp, shellfish, rodents, insects, and even shorebirds. They are also scavengers and will eat any carrion that washes up on the shore. Most are also kleptoparasitic, meaning they steal food or other resources from other animals. Gulls are also well renowned for their ability to adapt to human environments and structures, such as marinas, Wal-Mart parking lots, and garbage dumps. That’s thanks mostly to their bold nature and opportunistic diet. This makes them equally at home feeding above a school of fish on the open sea, stealing a Tern or fisherman’s catch, swallowing wayward hotdogs whole at a ballpark, or picking at kitchen scraps at the municipal dump. This is an important ecological niche that Gulls, along with Crows, fill and their adaptability helps fill ecological voids that might otherwise be exploited by more harmful invasive species, such as Black Rats and Feral Pigeons.
In our area two species of Gull dominate the inland and coastal habitats. Those are the Laughing Gull and Ring-billed Gull. Let’s talk about the Laughing Gull first. The Laughing Gull is our most common Gull and dominates the island in the warmer months. In the winter, some head further south but they are always present in number year round. They are named for their distinct call, which sounds a lot like laughter. The laughing gull is our second smallest gull and is easily identified by its size, dark legs and bill, slate gray back, and dark head in summer.
The Ring-billed Gull is our most common gull in winter, especially inland from the barrier islands. It and the next 4 gulls are all primarily winter residents of the island. The Ring-billed Gull is a medium sized gull that’s noticeably larger than a Laughing Gull. They are paler in appearance, lacking any markings on the head. They are identified by their yellow legs, pale gray back, and yellow bill with a conspicuous black ring.
The Bonaparte’s Gull is our smallest Gull. It’s seen on the open water along the coast. They tend to flock and hunt sea life more than other Gulls which typically scavenge alone. They are easily recognized by their diminutive size, slender frame, small thin bill, pink-orange legs, pale wings, and a small black spot behind their eye in the winter.
The Herring Gull is one of our larger Gulls. It’s most abundant in the winter but immature birds can be seen fairly regularly along the coast in the summer. They look quite similar to the Ring-billed Gull but the Herring Gull is substantially larger, has pink legs, and a heavier bill with a red spot on the bottom tip of the bill.
The Lesser Black-backed Gull is also a large Gull and is much less abundant than the other Gulls mentioned. It is restricted to the immediate coast in our area. They are primarily winter residents but immatures occasionally stick around over the summer. It looks very similar to the Herring Gull and is only slightly smaller. The Lesser Black-backed Gull is best distinguished by its yellow legs and slate gray back.
The Great Black-backed Gull is our largest Gull. It is substantially larger than even the Herring Gull. In flight they always give me the impression of a compact Bald Eagle, especially from above. They are also fairly uncommon and restricted to the beachfront. They look quite similar to the Lesser Black-backed Gull but the Great Black-backed Gull is distinctly larger with pink legs and a back ranging from slate gray to charcoal black.
I’ve included photos of adults each species (some much better than others) and for fun I also included a distant photo of multiple species to give an idea of what makes this group difficult to ID.
Whether we may want to or not, we share our island, our beach, and the handrails of our docks and boats with Gulls. No matter how tough things get, they’re a group of species that’s here to stay. I hope you learned something about these birds beyond their proficiency at whitewashing decking lumber or swallowing half-eaten hamburgers. We should have an appreciation for the group’s species richness and their place in our coastal ecosystems.
This week for Flora and Fauna Friday, were looking at our third and final festive plant. This partial parasite is a common site dangling from deciduous trees and doorways alike: Oak Mistletoe, Phoradendron leucarpum.
Oak Mistletoe is one of many species of Mistletoe found throughout the US but the only species found here in the Southeastern US. It is a small shrub with thick, leathery, evergreen leaves and pearl-white berries. However, unlike most shrubs it grows not on the ground but high in the air. Oak Mistletoe is parasitic in nature. It grows on and inside the branches of deciduous hardwood trees. I’ll go in depth on this later.
Oak Mistletoe is one of those species whose names say quite a lot about it. First, let’s dig into its scientific name, Phoradendron leucarpum. The specific epithet, leucarpum, translates directly as “White-Fruit” and this species indeed has prominent white fruits. The genus name, Phoradendron, can be interpreted one of two ways. The direct translation is along the lines of “Beared/Carried by Trees” but it can also be interpreted as “Thief of Trees”. Both of these translations are correct in regards to the biology of Mistletoes. Mistletoes are both supported physically and nutritionally by their host trees and they also steal nutrients and water from their host. So an appropriate translation of the scientific name could be “The white-fruited plant that steals from and is supported by trees.” The common name, Oak Mistletoe, sheds some light on the plant’s life history. It makes it rather obvious that Oaks are a common host for the species. Additionally, the term “Mistletoe” is derived from middle English word “Misteltan”, which is a compound word for “excrement” and “twig”. The plant is, in fact, dispersed by bird droppings that land on twigs.
Oak Mistletoe starts life as a seed, on a twig, in a pile of bird droppings. From there it germinates and quickly adheres itself to the bark of the host. Then the plant produces roots that penetrate the bark of its host and enter its vascular tissue. From here on out, Mistletoe grows like any other evergreen shrub. However, instead of spreading its roots through the soil in search of water and nutrients, it roots into the flesh of a tree and absorbs water and nutrients straight from its host. Oak Mistletoe is only a hemi-parasite. It photosynthesizes nearly all of its own food but it relies on a host for water and nutrients. As the branch of the host plant grows, so does the Mistletoe. It can reach about the size of a yoga ball. In our area, I most commonly find Oak Mistletoe growing on the branches of Water Oaks and Laurel Oaks but it can be found on many species of deciduous hardwood including Maples and most Oaks. Mistletoe photosynthesizes throughout the winter, so it prefers deciduous trees. Evergreen trees, like Live Oak, typically don’t allow enough light through their canopy for Mistletoe to survive. The fruit of Mistletoe matures in winter and is an important food source for many bird species, especially Bluebirds, Cedar Waxwings, and Northern Mockingbirds. Oak Mistletoe is also the host plant for the Great Purple Hairstreak, the largest species of Hairstreak butterfly in North America. Oak Mistletoe can be harmful to trees as it causes extra water stress in summer and the added weight can break branches. However, it is typically not an issue for healthy trees or if it is only present in small quantities.
The tradition of kissing under the Mistletoe dates back to Norse mythology and the legend of Baldur. I won’t re-tell the tale but it ends with Mistletoe becoming a conduit for a goddess’s “kiss” or blessing to all who pass beneath the plant. From this legend our modern tradition eventually evolved. Oak Misteltoe provides a blessing to wildlife who visit it too. It is an important food source for wildlife and acts as a conduit that harvests resources from its host tree and distributes it to wildlife during the hardest months of the year. Throughout the year it supports one of our most striking species of butterfly.
Oak Mistletoe may be a parasitic mooch and a re-gifter at that but even it is well versed in the spirit of giving. Have a Merry Christmas and Happy Holidays!
This week for Flora and Fauna Friday we’re looking at the second holiday plant in our 3 part series. This plant is one of dozens of species that have earned the title of “Christmas Tree” but this one is a native here on Edisto: the Eastern Redcedar, Juniperus virginiana.
The Eastern Redcedar is not a true Cedar, which are natives to Asia and members of the Pine family. It’s actually a Juniper, as the genus name suggests, and a member of the Cypress family. It’s a common woody plant throughout the entire Eastern US. It can grow as a hedge, bush, shrub, or a tree ranging in height from 15ft to 50ft tall. It has small evergreen scales and peeling reddish bark. In the lowcountry, most of what we see is the Southern Redcedar, Juniperus virginiana var. silicicola, which prefers maritime forests and is usually shrubbier in appearance. The Redcedar is a ridiculously hardy species that can be found in a myriad of habitats. From wetland edges, to sandhills, to saltmarsh hammocks, to oak forest understories, to fallow fields, to sandspits, Redcedars inhabit them all. They can live for centuries and frequently survive traumatic damage, including sheered off canopies, split trunks, toppling, and partial girdling. The Eastern Redcedar is dioecious, meaning there are both male and female trees. The foliage of males trees takes on an amber hue in winter as they develop pollen cones. When the pollen cones open, males trees can appear to be enflamed during a stiff breeze, emitting a smoky yellow cloud of pollen into the air. Female trees turn a blue green as their berry-like cones mature. These fleshy cones are an important food source for many birds, particularly the Cedar Waxwing which is named after its fondness for the fruit.
The Eastern Redcedar has several interesting uses beyond its use as a local Christmas tree and floral arrangements. (On a side note, your typical Christmas Tree is a Fraser Fir, Abies fraseri.) Its wood is rot resistance and is commonly used for fence posts. The heartwood is great for making both pencils and longbows. Also, the heartwood is a vibrant violet color when fresh. A remarkable sight to the unsuspecting woodsman. The aromatic compounds in the heartwood also repel moths, particularly the ones that dine on wool clothing. Lastly, but certainly not least, Juniper “berries” are an important flavoring in the spirit Gin.
This week for Flora and Fauna Friday, we’re beginning a short 3 part series spotlighting some of our important Holiday plants! Today we’re starting with a genus of trees and shrubs that are a staple of holiday decorations: the Hollies, genus Ilex.
The Hollies are known for their evergreen leaves and showy berries. In our area, we have three common species: American Holly (Ilex opaca), Yaupon (Ilex vomitoria), and Inkberry (Ilex glabra). All have smooth light gray bark, leathery evergreen leaves, and produce a berry that is attracts wildlife, especially birds. They are partial to life in the understories of hardwood forests and don’t do well in ecosystems with frequent fires, due to their thin bark.
American Holly is the quintessential Holly. It has spiny leaves and bright red berries. It is a common addition to festive floral arrangements due to the aforementioned aesthetics of its fruits and foliage. It can grow as an upright bush or into a fairly large tree. Its small red berries provide a much needed fall and winter food source for wildlife, especially birds like the Cedar Waxwing.
Yaupon, or sometimes called Cassina, is our most common Holly on the Island. Unlike the American Holly, they grow primarily as a shrub but can still reach 20ft in height. They are a common sight along woodland edges and hedgerows where they form dense thickets with their ashen trunks. Their leaves are much smaller than those of the American Holly and lack any spines. Their fruit is a minute, glossy, crimson berry that grows along the stem. Their scientific name, Ilex vomitoria, is a misnomer and comes from the use of the plant’s leaves by Native Americans in a purifying ritual that included the use of an emetic tea to induce vomiting. However, Yaupon does not actually contain any emetic compounds and can safely be brewed into a tea for human consumption. (Its leaves even contain caffeine!)
The Inkberry is a smaller plant than the other two Hollies I’ve mentioned. It’s typically only about head height and grows in sandy woods or wetland edges. It also has black berries as opposed to the red berries of the Yaupon and American Holly. The berries contain a pink juice that can be used as an ink or dye, hence the common name. Its leaves are also spineless, like Yaupon, but are more yellowish in color.
Today for Flora and Fauna Friday we’re examining another one of those ubiquitous Lowcountry plants. It’s a grass known commonly as Broomsedge, Bluestem, or Beard Grass and scientifically as Andropogon.
Each one of these common names describes a different characteristic of the plant. Bluestem describes the color of the foliage: a blue-green grass throughout the growing season. Beard Grass describes the appearance of the plant when it seeds in the fall: a pointed beard of straw covered with white fluff. Broomsedge describes its shape and winter color: an upside down, light brown broom-head. The scientific name of “Andropogon” means “Man’s Beard”, echoing the common name of Beard Grass.
Broomsedge, as I prefer to call it, is not a sedge but a grass. It is a rather diverse genus of grasses that all look rather similar. Its fresh leaves are often glaucous (the scientific way of saying bluish-green) and the more common species in our area can reach up to 5 feet in height. It is a pioneer species, meaning it is one of the first plants to grow in a freshly disturbed habitat. Think of clear cuts, fallow fields, or piles of fill dirt; those are the sorts of habitats that Broomsedge loves to pioneer. Broomsedges also do well in prairie or savanna habitats where regular disturbance by grazing and fire limit the growth of trees. They’re also a very common sight in hayfields and make up a fair portion of the hay the fields produce. In the fall the plants flower and go to seed, releasing hundreds of fluffy white seeds that rely on the wind to carry them to bare earth. Come winter, the grass dies back to its roots but the dried flower stalks from the previous year can persist for months afterwards. Broomsedges provide habitat and food for many species including: Field Sparrows, Rabbits, Sedge Wrens, Katydids, Cotton Rats, Mice, and Deer.
In our area we have quite a few native species but I’m only able to identify the two most common: Broomsedge Bluestem (Andropogon virginicus) and Bushy Bluestem (Andropogon glomeratus), which I have photographed below. The redundantly named Broomsedge Bluestem is our most common species and its appearance is typical of the genus. Bushy Bluestem is also quite common and more distinct in appearance, having large, bushy clumps of flowers rather than having them evenly dispersed across the stem. All our native species are quite similar in appearance and ecology but have slightly different habitat preferences. All provide a valuable ecosystem service in erosion control and soil restoration. Their deep, perennial roots stabilize the soil and bring nutrients up to the top soil from deep in the ground. When they die back each winter they replenish micronutrients and organic matter to tired topsoil and improve growing conditions for other plants. Over time, if grasses are allowed to perpetuate without being harvested for hay, they can restore a once barren field into a meadow, prairie, or savanna. Breathing new life into weathered earth.
This week for Flora and Fauna Friday we’re examining our most widespread winter warbler: they Myrtle Warbler (Setophaga coronata coronata). A bird affectionately referred to as the “Butter-butt” by bird watchers.
The Myrtle Warbler is the subspecies of the Yellow-rumped Warbler found here in the eastern US. They were originally classified as a separate species from the more western Audobon’s Warbler, then both were lumped together as the Yellow-rumped Warbler, and now there’s evidence to suggest they may be split again in the future. But that’s a different story for a different time from a different person. Myrtle Warblers are a member of the Wood Warbler family, Parulidae. Wood Warblers are a diverse group of small, insect-eating birds native to the New Word. They are notoriously difficult for beginning bird watchers to identify in the field due to their similar songs and plumages, highly variable appearance, and their tendency to move quickly through brush and treetops without giving you the chance for a clear viewing.
Myrtle Warblers are probably the easiest to identify warbler in our area. They are easily recognized by their distinctly butter-yellow rump, as well as their yellow flanks and crowns, white throat, and streaked breast with a white part down the center. Females (pictured below) and immature males are usually brown above with a dusky streaking to the breast. Adult males are more boldly patterned with steel-blue, white, and black with a split black breast and a black mask. They are also easily identified by their voice. Their call is a rather mundane, sharp “chek” that, once you’ve heard it a few thousand times (which can be fulfilled by these prolific birds in just a few winter outings), is hard to misplace.
Myrtle Warblers are migratory. They leave our state in spring for Canada, where they breed over the summer. In fall they migrate back to our state en masse, quickly becoming our most numerous woodland bird throughout the winter. You can sometimes see hundreds on a morning walk if you’re in the right place. They are unique among our warblers in that not only does the winter migration for many end in the southeastern US but their winter diet consists primarily of fruit. They get their common name from their wintery food source: the Southern Wax-myrtle (Morella cerifera). Wax-myrtles, as their common name suggests, produce wax. They produce this wax on the outside of their leaves and fruits to help conserve water. Myrtle Warblers eat these fruits to digest the wax. Wax is a type of fat, which is high in calories but typically hard to digest. Myrtle Warblers are able to exploit this rich food source with unique biological adaptations. The Wax-myrtle benefits from this relationship by having its seeds spread far and wide by this active little warbler. Myrtle Warblers can also be seen scraping wax off of the seeds of other plants, such as Poison Ivy and the invasive Chinese Tallow Tree, or visiting suet feeders for a fatty treat.
This week for Flora and Fauna Friday we’re taking a look at a bird that’s a familiar sight this time of year, although usually not in its natural setting. This week we’re taking a look at the Wild Turkey (Meleagris gallopavo). The Wild Turkey is the same species as the Domestic Turkey, which is the entrée of choice for Thanksgiving and Christmas dinners around the country. Wild Turkeys were domesticated in Mexico by the Native Americans approximately 2000 years ago. Here is SC, the Turkey season is in Spring, so Domesticated Turkey is what we’re eating.
The Wild Turkey is native to the eastern and central US but has been introduced to all of the lower 48 and Hawaii. Weighing up to 37.5lbs, The Wild Turkey is the heaviest bird in SC. (Domestic breeds can weigh more than twice this.) It comes in at a close second for the heaviest bird in the country behind the Trumpeter Swan, which has been recorded to reach 38lbs. Turkeys belong to the order Galliformes, which includes all of our gamefowl such as Grouse, Quail, Pheasants, and Chickens. Like most Galliforms, the Wild Turkey is heavy bodied and primarily qround-dwelling. Although they prefer to stay grounded, Turkeys are capable of flight and when cornered will escape to the air. They live in forests and roost in trees at night. Their diet consists of seeds, fruits, insects, and other plant material. They primarily eat large nuts like acorns, Beech nuts, chestnuts, pecans, and even Hickory nuts. They don’t crack the nuts or even chew them before swallowing. This is because Turkeys possess a particularly well developed gizzard. The gizzard is a powerfully muscular stomach that is filled with sand and small rocks, called grit, that the birds have consumed. With this organ, Turkeys are able to crush nuts like acorns, chestnuts, and pecans with relative ease and can even grind a Mockernut down until it shatters.
The Wild Turkey is sexual dimorphic. Males are called Toms and females Hens. Toms are larger with a darker, bolder plumage. Toms also have a several distinct physical features. The snood is the fleshy protuberance above the beak of a tom. The wattle is flap of skin below the chin of a tom. Caruncles are the many fleshy bumps on the back and sides of a tom’s neck. The beard is a patch of long, stiff, hair-like, black feathers found on the breast of a tom. Hens are typically smaller, more drab in appearance, and lack many of the growths found on the head and neck of a tom. A Gobbler is simply a Tom that is in it’s breeding plumage and/or performing a courtship display. During courtship a gobbler will retract its neck, fluff up its feathers, and both raise and fan its tail feathers to create an impressive display. Nesting occurs on the ground and juvenile Turkeys are called Poults.
The Wild Turkey is actually a conservation success story. It may not seem like it but their wild populations were almost extirpated from Georgia and SC by the mid-20th century due to unregulated hunting and habitat destruction. In the early 1950s, a biologist and conservationist by the name of “Duff” Holbrook pioneered the use of rocket-netting to capture Wild Turkeys in the Francis Marion National Forest and reintroduce them across the two states. His efforts were extremely successful and now the species can be found in every county of SC and most of Georgia.
This week for Flora and Fauna Friday, we’re looking at a genus of flowering bushes known as Baccharis.
Baccharis and the species within it are known by many names: Groundsel, False-willow, Silverling, Coyote-bush, Broom, or usually just Baccharis. There are three species found in our area: Silverling (Baccharis glomerulifolia), Saltwater False-Willow (Baccharis angustifolia), and Groundsel-tree (Baccharis halimifolia). These species are rather similar in appearance and habits but differ distinctly in the shape of their leaves and flowers. So I’ll touch on how they differ first.
Of the three, Silverling is probably the hardest to locate species in our state. It’s found exclusively along wetlands in the coastal plain. It has densely packed, compact, pale yellow flowers and silver succulent leaves (Not pictured). Saltwater False-willow is found exclusively on the edges of maritime forests and hammocks in saltwater tidal zones. It has small white flowers and narrow, succulent leaves. Groundsel-tree is by far the most common and is found on wetland edges and otherwise wet soil throughout the state. It has pale yellow flowers and leaves of highly variable shape that are usually light green to silver in color.
All of these species are salt tolerant, large shrubs with dense evergreen foliage and a scrubby appearance. They prefer full sun and grow on the edges of wetlands. They bloom in mid to late fall each year and resemble a snow laden bush when their silky white seeds begin to mature. Interestingly, Baccharis is a member of the Head Flower family, Asteraceae. This is a massive family of predominantly smaller, herbaceous plants. It includes plants like Sunflowers, Coreopsis, Bonesets, Goldenrods, Dandelions, Thistles, Asters, pretty much anything that resembles one of those, and many more. (I’ll talk about what defines a Head Flower on a later date.) However, it contains only a very few woody plants like Baccharis.
Baccharis is considered a weed by many. Its prolific flowers produce thousands of windblown seeds per bush. These seeds can float on the wind for miles and find their way into almost every patch of bare Earth, where they’re ready to germinate come spring. This means they often show up on pond edges, the edges of structures, neglected gardens, fallow fields, and fence rows with regularity. Their scraggly appearance, relatively short lifespan, and brittle wood don’t win them any points with landscapers either. However, there’s always a silver lining. Baccharis prefers to grow in sunny areas on wetlands edges, which means it is often found on the edges of dikes, causeways, and ponds where it provides excellent erosion control. It’s quick growing roots rapidly stabilize the soil and its soft, brittle wood means it’s likely to lose branches during a wind storm instead of uprooting and damaging a water control structure. Baccharis species are also fantastic nectar sources for pollinators. They provide a huge quantity of nectar to insects like bees, flies, wasps, and butterflies at the end of the growing season once most sources are beginning to dwindle with the coming of fall.
