Naked ladies or Surprise lilies trumpet their pink splendor in mid to late summer. These beautiful ladies are part of our foreign diversity in Eureka Springs and eastern North America generally, but alas they are just plants. Known as surprise lily, resurrection lily, magic lily or naked ladies, this pretender is laid bare not as a lily at all but a member of the Amaryllis family (Amaryllidaceae). These late blooming beauties produce unnoticed leaves in the spring, which soon die back. Out of the hot bosom of steamy August air a whorl of large showy flowers atop a leafless (naked) stalk pops from the ground.
Although not generally considered a medicinal plant, it does have bioactive components. Fayetteville, Arkansas’s KUAF Producer, Jacqueline Froelich aired a story on Surprise Lilies on 14 August 2014. You can listen to the story here. One of the alkaloids found in Lycoris squamigera is galanthamine, one of several toxic compounds in the plant. It is also famously known from the related amaryllis family member Galanthus nivalis or snow-drops a common alpine species in mountains of Europe, which is grown as an ornamental in North America, and occasionally naturalized. First isolated in the 1950s, galanthamine, formerly extracted from Galanthus nivalis, is now produced synthetically on an industrial scale. It was used in some parts of the world in the 1950s to treat nerve pain associated with polio. Today, the compound is regarded as a long-acting, selective, reversible and competitive acetylcholinesterase (AChE) inhibitor used in the systematic treatment of mild to moderate cognitive impairment in early stages of Alzheimer’s disease.
Amaryllis and it relatives cause plant name consternation. The genus Lycoris (to which our naked ladies belong) is native to eastern Asia, while Amaryllis is native to the Western Cape of South Africa. In 1753 Linnaeus named Amaryllis belladonna. Another closely related genus in the Amaryllis family is Hippeastrum from tropical America. The “amaryllis” that bloom around Christmas, available wherever bulbs are sold, are mostly hybrids of South American Hippeastrum species.
Our common naked lady is the Asian species Lycoris squamigera, an inelegant scientific name for an elegant plant. It superficially resembles the South African Amaryllis belladonna but differs in significant botanical characteristics as well as continent of origin. The first European illustration comes from a periodical famous for its unabashed Victorian paintings of reproductive organs (of plants)—Curtis’s Botanical Magazine volume 123, August 1, 1897. No doubt many gardeners, horticulturists and botanists have been confused by these relatives in the amaryllis family. It is no surprise that the surprise lily itself has lived under three scientific names over the decades including Hippeastrum squamigerum and Amaryllis hallii as well as the name used for more than a century—Lycoris squamigera.
Join me 18-24 June 2017 at the Eagle Hill Institute in Steuben, Maine, located way downeast, up the beautiful Maine coast in America’s most easterly county. The Eagle Hill Institute (formerly the Humbolt Research Institute) offers fascinating Natural History Science Seminars, and this is one in that series. Sign-up and join me in returning to my Maine roots!
“The Eagle History Institute setting is located on the densely forested summit of Eagle Hill, the highest part of Dyer Point, the peninsula between the Schoodic Point section of Acadia National Park and Petit Manan National Wildlife Refuge. Trails through its boreal forest lead from the summit of Eagle Hill to a number of overlooks offering inspirational views of the coast of Maine, with its rocky and evergreen-lined shore and its many islands, bays, and peninsulas. Other trails are just a short distance to Dyer Bay and a blueberry field” (from Eagle Hill Institute website). 59 Eagle Hill Road, P.O. Box 9, Steuben, ME 04680 |Phone: 207.546.2821, Fax: 207.546.3042, [email protected]
The campus features residential accommodations, classrooms facilities, dining facility, the extensive Eagle Hill Library with a specialized natural history collection, with on-line access to several thousand journals. With wi-fi available throughout the campus, the internet becomes an ocean of information via a high-speed connection.
Ecological Habitats at Eagle Hill
“Eagle Hill is the highest point on one of a series of peninsulas that extend into the Atlantic Ocean along the coast of eastern Maine. To the immediate west is the Schoodic Point section of Acadia National Park and to the immediate east is Petit Manan National Wildlife Refuge. The Institute lies within a coastal fringe of northern boreal forest with mostly spruce and fir and a mix of maples, birches, and other species. Most of the coastal area is sparsely inhabited. To the north, the land is used for logging but is still essentially wilderness. An unusually rich variety of habitats can be found within a short distance of the station: many different marine habitats as well as marshes, fens, bogs and heaths, blueberry barrens, lakes and ponds, rivers and streams, and extensive forested lands.” From Eagle Hill Institute website The Ecological Habitats in the Vicinity of Eagle Hill.
Medicinal Plants of Maine
Whether you’re a seasoned natural history professional or curious outdoor enthusiast, a working knowledge of medicinal plants promises new appreciation of how humans relate to plants. The use of plants for medicinal purposes has preoccupied humankind for millennia, across all cultures and every conceivable geographic region and landscape. Better known for lobsters than ginseng, Maine is home to a hidden treasure trove of pharmacologically active, useful and
fascinating plants with a story to tell about human experience, past and present. We will emphasize field identification, tradition and current scientific understanding of medicinal plants in eastern Maine (and beyond), both in the classroom and the field, stopping along the way for a photography or two.
Syllabus: Exploring Maine’s Medicinal Plants
With Steven Foster
The Diversity of Medicinal Plant Exploration
In any given temperate flora, upwards of 25 percent of vascular plants can be documented as medicinal plants at least in a historical context, and a high percentage of those plants have a rational scientific basis for their traditional medicinal use. Maine has a flora of about 2,100 species of vascular plants (compare that to 940± bird species for North America, north of Mexico). About a third of the Maine flora is represented by non-native species. Theoretically upwards of 500 species could be included in the total number of medicinal plants in Maine.
Medicinal plant research by its very nature is multidisciplinary and interdisciplinary. It includes numerous academic disciplines such as taxonomy, genetics, biogeography, ethnobotany, history, classic field systematics, phytochemistry, emerging analytical fields such as metabolomics, and broad-ranging disciplines encompassing pharmacology and medicine. Whether a member of an uncontacted Amazonian indigenous group or a patient undergoing leading-edge chemotherapy treatments, medicinal plants touch our daily lives in surprising ways.
Focus on the Plants Around Us
Exploring medicinal plants in a particular locale, such as Washington County, Maine, affords use the opportunity to focus in on the local flora and immerse into a microcosm of discovery.
To understand modern utilization of medicinal plants, the past must blend with the present. Our survey of medicinal plants found in Maine (and beyond) begins with the human experience of discovery. Given that in the twentieth century American society became largely separated from day-to-day knowledge and use of plants as medicines, we can approach the vast subject with with a sense of discovery and awe at the sheer volume of information available to us in the digitized twenty-first century. A word of caution, when it comes to authoritative information on herbal medicine “www” can stand for the “world wide wasteland” where anyone can “publish” anything without the benefit of editors, fact-checking or peer review. That said, however, the internet is an extraordinary source of detail. One must learn how to sift through relevant resources, just as an herb harvester must learn how to garble recently harvested plant material to produce a raw material for use.
A New Era of Discovery
Since the mid-1450s well over 130 million books have been published, many in the last 100 years. Any book published more than 100 years ago can reasonable be placed in the public domain, meaning that any copyright restrictions have expired. Through an extensive international effort, many of the world’s extraordinary libraries are digitizing their collections. To date over ten million books have been digitized.
Millions of books such as the important classic English herbals of the 16th and 17th centuries can be downloaded to your computer, tablet or smart phone as portable pdfs. For example, it is known that the Pilgrims who landed at what is now Plymouth, Massachusetts in 1620 carried with them a copy of the 1597 edition of The Herball of John Gerarde. A scanned, digital copy of the original book which looks just like the printed volume as a searchable pdf resides on my iPad. One of the first books to enumerate food and medicinal plants found in Maine is by John Josselyn (1630-1675)—New England Rarities Discovered: In Birds, Beasts, Fishes, Serpents, and Plants of That Country published in 1672. You can buy an original from an antiquarian book dealer for about $17,500. Or you can download a pdf copy for free from www.biodiversitylibrary.org or from www.archive.org.
The new digital reality give us access to the world’s great libraries and rare books that heretofore required an appointment, credentials, and significant time in a rare book room in a major library. This creates the opportunity to discovery where a particular use for a plant may have originated. For example, a folk preventative and remedy for gout, passed down through generations, is eating copious amounts of wild strawberries in early summer. As fate would have it, this was a serendipitous discovery of the founder of modern botanical and zoological taxonomy, Carlos Linnaeus (1707-1778) who suffered from a severe gout attack in 1749, and by chance ate a handful of wild strawberries which relieved his gout (as noted in his diary). Almost all of the published works of Linnaeus are now on-line as downloadable pdfs.
Once we have a sense of traditional or historic use, modern print literature and database resources such as internet search engines such as PubMed (the database of the National Library of Medicine, the world’s largest medical library), Google Scholar, and other free resources will help us to separate the wheat from the chaff.
Questions to Explore
In a week’s time, we can reasonable expect to explore about 50 medicinal plant species found in Washington County near Eagle Hill. We will attempt to discover how to find answers to a series of questions, including and not limited to:
1). What is the plant’s identity and pertinent morphological features for field i.d.?
2). Where does the plant originate and what is its habitat? Is the plant indigenous to Maine? Is it rare or widespread? Is it an invasive alien? What is the plant’s geography in Maine and elsewhere?
3). What do we know about medicinal use in a historical sense, and is that relevant today?
4). What types of scientific information, such as chemical, pharmacological, or human studies are available to suggest confirmation of, or perhaps refute traditional use?
5). How is the plant prepared for use?
6). What dosage forms are used traditionally or in modern medicine?
7). Is there anything we can learn from other cultures about present or potential use?
We will emphasize field identification, traditional and current scientific understanding of medicinal plants in eastern Maine (and beyond), both in the classroom and the field, stopping along the way for photographic opportunities and collection, if appropriate. Weather permitting, mornings will be spent in the field collecting when possible and identifying plants. Along the way we will take time to hone our photographic and observation skills, learning to “see” what me might otherwise overlook had we been paying attention.
Afternoon and evening class sessions will include photo-illustrated presentations on field collection and observation techniques, plant i.d., and exploring information resources on plants that we observe in the field.
No library of books, electronic network or database of information can replace the knowledge gained from the tactile experience inherent in being human—touching, tasting, observing and smelling the plants that grow around us. A walk in the woods is a chance to get to know the plants around us.
Duke, James A. 1986. Handbook of Northeastern Indian Medicinal Plants. Lincoln, Mass.: Quarterman Publications.
Duke, James A., Mary Jo Bogenschutz-Godwin, Judi duCellier, and Peggy-Ann K. Duke. 2002. CRC Handbook of Medicinal Herbs. Boca Raton, Fla: CRC Press.
Foster, Steven. 1995. Forest Pharmacy — Medicinal Plants in American Forests. Durham, N.C.: Forest History Society.
Foster, Steven. and James A. Duke. 2014. Peterson Field Guide to Medicinal Plants: Eastern and Central North America. 3rd edition. Boston and New York: Houghton Mifflin Harcourt.
Foster, Steven, and Christopher Hobbs. 2002. A Field Guide Western to Medicinal Plants and Herbs. Boston: Houghton Mifflin.
Foster, Steven, and Rebecca L. Johnson. 2006. National Geographic’s Desk Reference to Nature’s Medicine. Washington, DC: National Geographic.
Foster, Steven, and Varro E. Tyler. 1999. Tyler’s Honest Herbal. 4th ed. Binghamton, N.Y.: Haworth Press.
Foster, Steven, and Yue Chongxi. 1992. Herbal Emissaries — Bringing Chinese Herbs to the West. Rochester, Vt.: Healing Arts Press.
Grieve, Maude. 1931. A Modern Herbal: The Medicinal, Culinary, Cosmetic and Economic Properties, Cultivation and Folk-lore of Herbs, Grasses, Fungi, Shrubs & Trees with All Their Modern Scientific Uses. London: Jonathan Cape.
Haines, Arthur. 2010. Ancestral Plants: A Primitive Skills Guide to Important, Edible, Medicinal, and Useful Plants. Vol. 1. Turner, ME: Anaskimin (www.anaskimin.org)
Haines, Arthur. 2011 Higher Vascular Plants of New England. Framingham, MA: New England Wildflower Society; New Haven: Yale University Press.
Haines, Arthur. 2015. Ancestral Plants: A Primitive Skills Guide to Important, Edible, Medicinal, and Useful Plants. Vol. 2. Turner, ME: Anaskimin (www.anaskimin.org)
Haines, Arthur and Charles Vining. 1998. Flora of Maine. Bar Harbor, Maine: V.F. Thomas Co.
Mittelhauser, Glen H., Linda L. Gregory, Sally C. Rooney and Jill E. Weber. 2010. The Plants of Acadia National Park. Orono: ME: University of Main Press.
Moerman, Daniel E. 1998. Native American Ethnobotany. Portland, Ore.: Timber Press.
Josselyn Botanical Society. 1995. Checklist of the Vascular Plants of Maine. Josselyn Botanical Society of Maine Bulletin 13. Orono, ME: Maine Agricultural and Forest Experiment Station, Bulletin 844.
Often when I’m out on a group hike, we come across plants that some are surprised to see in Arkansas. One of those plants is yucca. In fact, that are five species of Yucca recorded from Arkansas, including two or three from Carroll County, depending upon botanical whim. Botanists are so adept at changing plant names, that if they were put in charge of naming planets, we would surely wake-up one morning to discover that we no longer live on a planet called Earth. Telling Arkansas’s five yucca species apart from one another takes a good deal of chin rubbing.
Fortunately for lay-folk consumers of botanical knowledge, the common name yucca is the same as the genus name—Yucca. One species of Yucca here in Carroll County has a name that’s easy to remember —Yucca arkansana which is kin to Yucca louisianensis due to inbreeding or some other evolutionary exchange of genes in the pre-human past. In 2014, the late Dr. George P. Johnson, a botanist at Arkansas Tech in Russellville found Yucca freemanii in Miller County. Besides these three native species, Yucca filamentosa and Yucca flaccida occur here but are not native to Arkansas; they are naturalized. In other words, they were planted at some point and now grow and reproduce without the help of humans.
In North America (north of Mexico) there are twenty-eight species of Yucca. Yuccas have been used for thousands of years for food, beverages, detergents, medicines, construction material, and especially as a fiber plant. During the First World War, 80 million pounds of yucca fiber were used to make course bags. The U.S. Navy used a special heavy paper made from yucca fiber during material shortages of the Second World War. Over the centuries, among indigenous groups of the American Southwest, yuccas were the foremost wild plants used for material necessities.
One National Park in California is named after a yucca (Yucca brevifolia) the 792,683-acre, Joshua Tree National Park. President Franklin Delano Roosevelt decreed it a National Monument in 1933. In that same year, a cousin of Roosevelt’s, Susan Delano McKelvey, published a paper on yuccas in the Journal of the Arnold Arboretum of Harvard University where she worked as a research associate and valued patron. So which came first, the President’s decree or his cousin’s interest in Joshua tree and other yuccas? Later, she wrote the definitive two volume work Yuccas of the Southwestern United States. My vote goes to Roosevelt’s cousin.
Dispatch from County Cork, Ireland! Just returned from an Herbal Excursion to the Emerald Isle, sponsored by Cynthia Graham at Nurse Natural Path. Among the many things that I learned is that what you read into your own expectations may not be true. For example, I did not expect any place on earth at 53 degrees North latitude to be harboring palm trees and herbaceous plants from the Amazon. The warm clothes I brought with me proved mostly superfluous, a pleasant surprise, indeed, while basking in the comfort of temperatures in the low to mid 60°F range.
We visited Blarney Castle on 30 August 2015, famous for the Blarney Stone, which one kisses to gain the gift of eloquence and exposure to unknown microorganisms from tourist the world over. The first castle at the site was a wooden hunting lodge built in 1210, which seems old until you consider that some of the stone structures in Ireland were built a thousand years before the great pyramids in Egypt. The present Blarney Castle was built in 1446, so in Irish historical terms, it is a relatively new structure. Please forgive my lack of eloquence as I was too busy looking at the plants around Blarney Castle to stand in line to kiss the Blarney Stone, and as I wrote the intital draft of this article I was well into an evening draft or two of Guinness.
Instead, at Blarney Castle, I spent most my two hours at the site in the Poison Plant Garden, which is the only one of its kind in Ireland. I was somewhat amused by the selection of plants in the garden, which included our Ozark native mayapple (Podophyllum peltatum), black cohosh (Actaea racemosa) and skullcap (Scutellaria lateriflora). While mayapple has legitimate claims to toxicity, black cohosh and skullcap themselves have no real safety issues except for products bearing their names that have been adulterated with toxic imposters. Nevertheless, by association in the absence of a complete understanding of the literature, the casual observer might think that they have some toxicity. There was a display of our native eastern North American poison ivy (Toxicodendron radicans) imprisoned in a cage with thick iron bars that a grizzly bear looking for a honey-rich beehive could not break-through.
One of my fellow travelers beckoned, “Steven, look at this.” And there at the other end of the garden, beneath what appeared to be a repurposed geodesic dome playground monkey bar were caged marijuana plants. The warning sign was boldly emblazoned with skull and cross bones, a warning of the potential danger of the plant. Hmmm, I thought. A playground structure as a make-shift cage for marijuana plants? This can only be Irish humor.
Greetings from the Southern Maine Coast, as I contemplate my personal and family history in a be-here-now moment. My parents, married in 1951, have lived in the same house since. They are both in their mid-80s and mentally-sharp. “Going home” is going home, to the house in which I was raised.
I turn to memories of vegetation as is my obsession. In the past week I’ve been scanning old family photos. Amongst the files was a long-forgotten newspaper interview with me from the Portland Press Herald published in 1990. The accompanying photo has me ankle-deep in dandelion blossoms on what we called the side lawn at my parent’s home. My dad, Herb, reminded me that my grandmother, Lena Foster, went out every spring and harvested dozens of dandelion crowns—the rosettes of leaves obvious before dandelion flowers. I fondly remember eating my grandmother’s boiled dandelion greens with a dash of vinegar. In his 65-years of maintaining, mowing and improving the side lawn, my dad has proudly managed to turn the entire lawn into a monoculture of neatly mowed grass. “All of the dandelions are gone!” I exclaimed. “Good,” my dad, Herb replied.
I see their absence as a symptom of a greater evil—our society’s insatiable appetite for mowing and mowing machines. The fields surrounding the property, less than 2 acres, are mowed a couple of times during the growing season. Grass takes over a field once thick with wildflowers, such as common milkweed food of monarch butterfly larvae. Oh that pesky word “weed.”
“Why did you have that field cut now?” I asked my mother. “Why? she replies as if I’m daft, “Because the grass was too tall.”
My childhood memory banks flash back to scenes of crouching amidst the un-mowed thicket of common milkweed, aflutter with monarch butterflies. The colors and movement were punctuated by the random symphony of polyrythmic insect buzzes, hums, and chirps.
When I was born in 1957, mowing was done with non-motorized push mowers. The cut was rough, but only a small area was mowed. Tractor-mounted mowers were used only to harvest hay. Now Americans are obsessed with every manner of hand-held, self-propelled, riding, and undoubtedly soon, robotic mowing machines. A Professor at the University of Massachusetts Plant Sciences Department, Lyle E. Craker, reminds me that the best high-paying jobs available for graduates in plant sciences is in the field of “turf management.” I haven’t mowed my yard this year. Interesting mix of grass species going to seed.
“Hey Dad, maybe you should change your name from Herb to “Turf.”
It’s milkweed season in the Ozarks and elsewhere in North America. There are over 100 species of milkweeds, members of the genus Asclepias, named by Linnaeus in 1753 after the Greek god of healing, Asclepius. Conspicuous among milkweeds now blooming is Asclepias tuberosa—butterflyweed, pleurisy root, or chiggerweed—with its brilliant showy orange flowers. I assume the name chiggerweed refers to the fact that our friendly little flesh-eating spider-relatives enjoy living on the plant. The larger tuberous root is used medicinally to treat inflammatory lung conditions, hence the name pleurisy root. If you spend time around one of the plants with camera in hand, inevitably one of the most beautiful of our native wildflowers attracts butterflies in addition to photo seekers.
Butterflyweed, and a couple dozen other North American species of milkweeds attracted widespread media attention last fall when monarch butterflies failed to show-up in the winter home of oyamel fir forests in Central Mexico. The spectacle of millions of monarchs
covering trees in their winter home in Mexico since time immemorial was replaced last year by a few thousand monarchs fluttering about trees. Monarch larvae feed exclusively on milkweeds, sequestering bitter and potentially toxic cardenolides which deter predators from feeding on the butterflies as they make the journey south each winter. Monarch numbers declined by 59% from 2012 to 2013. One of the major factors relative to the decline is the dramatic loss of habitat for milkweeds, with 160 million acres consumed by agricultural or suburbia over the last 17 years alone.
Public awareness about the decline of monarch butterflies has translated into awareness of milkweeds — the food of monarch larvae. In 2014 various organizations have been distributing seed or plants of the dozen or more species of Asclepias found in our area and coaxing them to plant milkweeds. One of the main milkweeds found in the eastern U.S., is called appropriately common milkweed Asclepias syriaca. This species seems to be the favorite food of monarch larvae.
The analogy of chaos in nature as characterized by the flapping of a butterfly’s wing in the Amazon affecting weather elsewhere demonstrates the interconnectivity of all living things. Without habitat we have no milkweed. Without milkweeds we have no monarch butterflies. Without humans nature maintains balance. Pay attention to life on earth.
In my Eureka Nature column, August 16, 2012, in the Eureka Springs Independent Newspaper, I posed the question what’s in the name Leatherwood (as in Lake Leatherwood and Leatherwood Creek) and whether that name referred to a small shrub known as Leatherwood (Dirca palustris) or some other plant, person, or place. The plant had not been collected in Carroll County since the early 20th century. In fact it is absent for Carroll County in the new Atlas of the Vascular Plants of Arkansas a publication of the Arkansas Vascular Flora Project, just released a few weeks ago. The Atlas has county range maps for 2,892 species of vascular plants known from Arkansas. Of course, it reflects what we don’t know as much as what we do know. It presents the opportunity to fill gaps in knowledge. Trained field botanists working in Arkansas are an extremely rare species. There’s simply not legions of botanists doing systematic field botany and collecting herbarium specimens— dried, pressed, physical specimens — the scientific foundation for plant geography and taxonomy.
On Sunday May 4th, I was delighted to be invited to tag along with a small legion of botanists at Lake Leatherwood. Led by Theo Whitsel, long-time botanist with the Arkansas Natural Heritage Commission, a group of 12 “brain trust” leading botanical experts from Arkansas and Missouri, did a quick walk through Leatherwood trails just to see what might be there. It was a quick “drive-by” on their way to other locations such as the new Devil’s Eyebrow Natural Area in Benton County, just north of Eureka Springs off of Highway 62, a 2,000 acre research just dedicated a year ago on the cold, snowy morning of May 3rd 2013.
To my surprise, there along the edge of the Hyde Hollow drainage growing in the moist gravel at the edge of the creek was Dirca palustris, the Leatherwood shrub. I had been in that same location many times before, but just hadn’t noticed it. It’s non-showy flowers are among the earliest of the season, blooming long before the leaves unfold.
Leatherwood is a small shrub, about three feet tall; a member of the mezerum family (Thymelaeaceae) found along creek bottoms from New Brunswick, west to North Dakota, couth to Florida and Louisiana. It is found in northwest and southwest Arkansas, but is not particularly common anywhere. Dirca is the only North American genus of the largely tropical plant family to which it belongs. Dirca palustris is an obscure medicinal plant, which like other members of the mezerum family are better known for their toxicity than their medicinal benefits. The fruit is considered toxic, and the fresh root, applied to the skin causes blistering. Tiny doses of the fresh bark causes vomiting and diarrhea. It is among the most obscure American medicinal plants.
Naturalist-explorer C.S. Rafinesque (1783-1840) provides insights into the potential of Leatherwood in Medical flora, or Manual of the medical botany of the United States of North America. 2 vols. Philadelphia, Samuel C. Atkinson. In the first volume (pp: 158-161) he notes:
“The blossoms are scentless and appear very early in the Spring, as soon as the Maples blossoms, long before the leaves are unfolded. The bark is very tough, can hardly be broken, and tearing in long stripes is used as yet in many parts for ropes, a practice borrowed from the Indian tribes : the wood is also flexible. The berries are poisonous, children must avoid them : if eaten by mistake, an emetic must be resorted to. . . . When the bark is chewed it produces salivation, it is so tough that it cannot be reduced to powder, but forms only a kind of lint. The watery preparations are nearly inert.”
In another interesting twist to the Leatherwood, story is the work of the Kansas State University research team of Aaron J. Floden, Mark H. Mayfield and Carolyn J. Ferguson in 2009. A new, single population of “Dirca palustris” was collected in Kansas in 1997. As the researchers looked more closely at the plant, they discovered it was quite distinct from D. palustris, in fact in 2009 they named a new previously undescribed species—Dirca decipiens (meaning “deceptive”). Subsequently they conducted simultaneous surveys of flowering Leatherwood plants in Kansas, Missouri, and Arkansas. These field observations resulted in finding the newly named Dirca decipiens in both Benton and Carroll counties in Arkansas. It differs in producing larger fruits, without stalks, and hairy branchlets, among other features. In 2009, this rare plant was only known from three populations. Another major caveat is that it occurs on northeast facing bluffs and slopes above the valley floor in rather dry limestone habitats, rather than along creeks in rich wooded bottomlands, where one finds Dirca palustris. Dirca decipiens blooms about a week later, too (Florden, A.J., M.H. Mayfield, and C. J. Ferguson. A new narrowly endemic species of Dirca (Thymelaeaceae) from Kansas and Arkansas, with a phylogenetic overview and taxonomic synopsis of the genus” J. Bot. Res. Inst. Texas 3(2):485–499, 2009.
To my mind the mystery of where the name Leatherwood originated relative to the lake, park, and creeks of the same name is solved. No more speculation. Case closed.
Adapted and expanded from Steven Foster’s Eureka Nature column, Eureka Springs Independent Newspaper, August 16 2012 & May 7, 2014