Our 2nd earliest trillium is up and almost ready to flower. The deep south native Trillium underwoodii is the second toadshade to emerge, only behind the Florida genetics of Trillium maculatum, which emerges here in December. Although there is plenty of cold remaining, Trillium underwoodii is able to tolerate multiple nights of hard freezes below 20 F after the foliage has emerged. Winter hardiness is Zone 6a-9b.
I was just admiring our specimen of the East Coast native, Thuja occidentalis ‘Concessarini’ today. I find this a fascinating plant in the garden, sadly never promoted by those who claim to extoll the virtues of native plants.
Our oldest specimen below is now 10 years old and measures 3′ tall x 6′ wide…quite a bit larger than it’s introducer claims it to be at 1′ tall x 2′ wide. If you dig deeper, you’ll see that the plant patent application shows they only measured a three year old plant, and have never bothered to update the mature size in their marketing or on their tags. It shows how little many plant introducers think of the end consumer, when they set them up for failure by promoting these fake mature sizes. Commercially, it is marketed under the fake trade name of Pancake arborvitae. That’s one seriously lumpy pancake.
This juvenile-foliage sport of Thuja ‘Linesville’ was discovered by nurseryman, Gabriel Cessarini. We think it’s pretty cool, just allow enough room in the garden. Winter hardiness is Zone 3a-8b.
Flowering in the garden this week is the fascinating, but little-known Houstonia procumbens. This Southeastern US coastal native (South Carolina west to eastern Louisiana) is a spreading, winter flowering bluet. We collected cuttings in Clay County, Florida in 2003, and this patch has been thriving in our sunny alpine garden since then, forming a 1.5′ wide patch.
We’ve published blogs about a number of carex from our rather large collection (108 species) several times this year, but here are a few more that look great here in early December. We have been fortunate to be able to collect members of this amazing genus from around the world, all of which now reside happily here at JLBG. As you can imagine, the majority of our collections are US native species, but just like with Homo sapiens, we value diversity and consequently don’t profile or discriminate based on ethnicity or origin.
The first is the US native Carex austrolucorum. This is Jeremy’s collection, named Carex ‘Tennessee Mop Top’.,
Carex gentilis ‘Yushan’ is our collection from Taiwan, and the only fall-flowering carex we know. Duke Gardens has made stunning use of this in their magnificent Asian garden expansion.
Carex ‘Silk Tassel’ is a stunning selection of the Japanese Carex morrowii var. temnolepis, brought to the US back in the 1970s by plantsman Barry Yinger. We still view this as one of the finest carex we’ve ever grown. While it grows great in shade, it truly excels in full sun, where its narrow variegated leaves appear silver.
I’ve been very blessed on several UK visits to spend time at the amazing Ashwood Nursery of plantsman John Massey. One of the real treats of each visit is a chance to spend time in John’s private hepatica greenhouse. To say John is a bit obsessive about the genus is a grand understatement, so it should be no surprise that he has channeled all that knowledge into a new Hepatica book, that’s hot off the press.
We first learned of John’s obsession with the genus, when he joined us on a 2000 expedition through NC, SC, Alabama, and Tennessee to study the hepatica in the wild…along with our main goal of studying trillium. Below is an image from that expedition. Hepatica are also native to Asia.
Our copy of My World of Hepaticas arrived recently, and John’s book is a massive 296-page compendium of pretty much anything you’d want to know about hepaticas, compiled from John’s decades of work with the genus. John’s writing style is easily readable, coming across as if you’re having a relaxed conversation over dinner, and the incredible photos are an equal match to the text. Right now, you can only obtain a copy by ordering it from the Ashwood website.
Juniperus communis is a common landscape juniper with a wide natural distribution…one of the widest of any woody plant in the entire world.
In the North American part of its range, it’s widespread throughout the Western US, and across the northern tier of the country all the way to Maine. East of the Mississippi River, however, it’s virtually not-existent south of the Great Lakes.
Patrick McMillan had been telling us about a population he rediscovered from an earlier Henry William Ravenel (1814-1887) documentation of a single clone growing naturally in Aiken, South Carolina. Last week, we made the 4 hour drive to visit this ancient living fossil. Here is all that remains, growing in an amazing nature park, known as Hitchcock Woods, where it grows surrounded by a forest of Kalmia (mountain laurel).
We have this propagated and growing at JLBG, and hopefully in the future, when our plants get larger, we can share these amazing genetics with a wider audience.
Looking great this week are most of the desert ferns, especially the wonderful Cheilanthes tomentosa. So many folks still don’t realize that an entire group of ferns grow naturally in desert conditions, often alongside cactus. This fern favorite has a shockingly large and unusual distribution, from Arizona east to Virginia. We’re fascinated why this evergreen fern known as Wooly lip fern, isn’t more widely grown. Hardiness is Zone 6a-8b, at least.
Mid-October is flowering time for the widespread (Canada south to Texas) native oblong aster, Aster oblongifolius (aka: Symphyotrichum oblongifolium). This amazing plant forms a large clump to 2′ tall x 8′ wide. This is the clone Aster ‘October Skies’, which is quite similar to the other widely grown clone, Aster ‘Fanny’. Average to dry soils in full sun is the key to success. Hardiness is Zone 4a-9b.
The shrubby North American native salvias including Salvia greggii and Salvia microphylla are spectacular plants in the fall garden. The same goes form the hybrids between the two species, known as Salvia x jamensis. Here is our clump of Salvia x jamensis ‘Blast’ looking absolutely stunning in late October. Flowering is heaviest in spring, slowing in summer, but again equaling it’s spring show in fall. Hardiness is Zone 7a-9b, and possibly a good bit colder.
The gigantic, winter hardy, North American native, cow tongue cactus, Opuntia lindheimeri ‘Linguiformis’ is looking wonderful in the fall garden. We planted our original plant back in 2000, but when reworking a bed, needed to move it about 4 years ago. We took a couple of pad cuttings which languished, laying bare root on a bench for nearly 2 years. Despite this abuse, this is the result two years after those cuttings finally went in the ground. We find this to be the largest of the Zone 7 winter hardy prickly pear cactus, maturing around 7′ tall x 12′ wide. Winter hardiness is at least Zone 7b-10b, and perhaps colder.
You go straight through to the round of botanical superstars if you recognize this little-known southeast native (SC to Florida), Piriqueta caroliniana. This Patrick McMillan collection from coastal SC has thrived all summer in our full sun rock garden, flowering constantly, with new flowers opening every other day. This oddity is a member of the Turneraceae family, which comprises nine other equally obscure genera. We’ve yet to determine if this will actually make a good garden plant, but evaluation continues. Hardiness north of Zone 8a is unknown.
One of the stars of our late summer/early fall garden has been our selection of Chrysopsis mariana ‘Little Miss Sunshine’. We made this roadside collection of this East Coast native in 2020 in neighboring Orange County, NC, unsure of what we had collected, but loving the purple stems of this clone. This planting in our rock garden has produced an amazing 18″ tall x 2′ wide specimen that glows for months. Dry soils and at least half day sun are the keys to success. We’ll start propagating this showy, clumping native perennial in spring. Winter hardiness is Zone 4-8.
Carex ‘Willow the Wisp’ is one of Zac Hill’s amazing collections from nearby Willow Springs, NC. This is a widespread native, naturally ranging from Michigan south to Florida and west to Texas. We love the appearance of a head of green hair…minus the head. In the wild, this selection of Carex leptalea var. harperi thrives in wet mucky swamps, like the story of Will-o’-the Wisp. We planted this in similar conditions in a seep at JLBG, where it has made this stunning specimen. Any plant that looks this good in October is undoubtedly destined for a future catalog.
Our 2008 introduction of a selection of our native Yucca x gloriosa ‘Lone Star’ has been absolutely splendid in the garden as the fall season begins. Yucca x gloriosa is a natural hybrid of Yucca aloifolia and Yucca filamentosa. We absolutely love that these flower spikes appear at a time when most other plants are past their seasonal prime. Winter hardiness is Zone 7a-9b.
How many folks are growing Hypericum hypericoides (St. Andrew’s cross)? The name translates to hypericum that looks like a hypericum….duuuh. We love this native shrub which hails from New Jersey southwest to Texas. St. Andrew’s cross typically matures at 2.5′ tall x 5′ wide and adorned from May through September with small, light yellow flowers, which form an “x”, hence the common name.
In the wild, Hypericum hypericoides is usually found in slightly acidic to slightly alkaline sandy soils, often in pine savannas, but in cultivation, they seem quite adaptable to an array of garden conditions from sun to part sun. In form, it resembles a Helleri holly with yellow flowers. The photo below is a 2 1/2. year old plant at JLBG. Winter hardiness should be Zone 6a-8b at least.
Few plants I’ve ever grown enchant me like Forestiera angustifolia ‘Woodlanders Weeping’. This incredible weeping selection of the Texas native is typically known as a scraggly upright bush that grows in dry alkaline soils. This special form was discovered in Calhoun County, Texas in 1992 by our friend Bob McCartney and the late Texas plantsman, Lynn Lowrey. In 1996, Bob, Lynn, and Patrick McMillan returned to the site for cuttings. It was subsequently propagated and introduced by Woodlanders Nursery. Surprisingly, it also thrives in moist acidic soils, and seemingly has no garden conditions where it doesn’t thrive.
We actually enjoy the incredible structure of the deciduous bare stems more in the winter time without the tiny deciduous foliage. The photo above was just taken at JLBG in late September. Mature size is 6′ tall x 25′ wide, so be sure you have a large enough space. I would think this is a plant that would be embraced by every native plant nursery, unless they have one of those bizarre hang-ups that man-made state political borders matter. Winter hardiness is unknown, but at least Zone 7b-9b.
Adiantum capillus-veneris ‘Bermuda Run’ is looking exceptional in the garden this fall. Actually, it looks exceptional most of the year for us. Until the temperatures drop below 12 degrees F, this amazing fern remains evergreen. This fern has a huge native range, being found on every continent except Antarctica.
Adiantum capillus-veneris, along with a couple of pteris fern species are often found growing in mortar cracks in many of the Southeast coastal cities and adjacent tropical islands. It is thought that some of these populations may have been spread along the early trade routes. This particularly dense form is our collection from the mortar walls on Bermuda. The same species is native to North Carolina, but only in a solitary population. Winter hardiness is Zone 7b-10b.
Raise your hand if you grow the woodland perennial, Collinsonia? These mostly fall-flowering, clumping perennials in the mint family (Lamiaceae) are wonderful elements for the woodland garden at a time when little else is flowering. Named by Linnaeus to honor English botanist Peter Collinson (1694–1768), the genus Collinsonia contains 11 species of which 4 are native to North America. Five species are native to China, 1 to Taiwan, and 1 to Japan. Pictured below in flower this week is Collinsonia punctata, which hails from South Carolina west to Louisiana. Winter hardiness is unknown, but we guess Zone 7a-9b, at least.
Now that fall has arrived, we’re all enjoying peak plume season for many of our favorite ornamental grasses. Unfortunately, there are a few significant mix-ups in the trade. The top photo is our native Eragrostis spectabilis, known as purple love grass. I’ve long admired this beautiful, but short-lived native, but have declined to offer it because of its propensity to seed around much too vigorously in the garden. In prairie restorations or less-tended gardens, it can be a spectacular addition. Hardiness is Zone 5-9.
Because most nurserymen aren’t plant taxonomists, you can perform a Google images search and find several on-line vendors who pretend to offer Eragrostis spectabilis, but show photos of the grass below, known as Muhlenbergia capillaris. Who knows which of the two they are actually selling.
If that’s not confusing enough, the plant below is known in the trade as Muhlenbergia capillaris or Gulf Coast muhly grass/pink muhly grass. The only problem is that this is actually a different muhlenbergia species. All of us have taken this name for granted, but as our Director or Horticulture/Gardens, Patrick McMillan taught us, all commercial plants labeled as such are actually Muhlenbergia sericea. We are updating our records and this name change will be implemented in the near future.
The misidentification originated with a Florida taxonomist, who mistakenly lumped three muhlenbergias together…a problem that can occur when you only study dead/smashed plants in a plant herbarium. As it turns out, the two plants, Muhlenbergia capillaris and Muhlenbergia sericea (also formerly known as Muhlenbergia filipes) are nothing alike.
The true Muhlenbergia capillaris is a rather homely plant that few folks would want in their garden. Muhlenbergia sericea, on the other hand, is a stunning ornamental plant, commonly known as sweet grass, and used for making those amazing hand-woven baskets that you find for sale in towns like Charleston, SC.
Such nomenclatural faux pas take decades, at least, for nurseries to get the names corrected since the public knows and purchases plants under the wrong name. This problem is far too common. The shrub, Ternstroemeria gymnanthera, was originally mistakenly identified as Cleyera japonica, and that mistake still persists over five decades later. Most gardeners despise name changes, often not realizing that many instances like these aren’t changes, but instead corrections of an earlier identification mistake.
You can learn more details about the mix up by reading Patrick’s article about pink muhly grass.
We are pleased to announce that Dr. Patrick McMillan’s new book, A Guide to the Wildflowers of South Carolina, has been published. While Patrick taught at Clemson, he was approached to update The Guide to Wildflowers of South Carolina (Porcher), first published in 2002.
After studying over 200,000 herbarium sheets (dead, smashed plants), and making countless trips into the field to photograph and study the plants in habitat, the updated book, A Guide to the Wildflowers of South Carolina has been born. This amazing 613-page book is a dramatic update from 2002 version, complete with more images, completely revised distribution maps, and an additional 200+ plant species.
I have known Patrick for over 30 years, and we are so blessed to have him as our JLBG Director of Horticulture and Gardens. We are the beneficiary of his encyclopedic plant knowledge every day, but now everyone can benefit from that same knowledge through this amazing new book.
His new book, which has an official publication date of next month, is available through your favorite on-line bookseller. Whether you live/travel, or botanize in NC, SC, or any of the Southeastern states, you will find this book invaluable.
I’d grown quite a few eryngiums…49 different ones, in fact, before Patrick shared Eryngium ravenelii with us in 2015. Who knew we were missing one of the best eryngiums in the entire genus! Today, Eryngium ravenelii holds several places of honor in our garden, where we can watch the myriad of pollinators who regularly stop by for a nectar snack during flowering season (mid-August to late September).
Eryngium ravenelii was named for American botanist, Henry William Ravenel (1814-1887). In the wild, Eryngium ravenelii grows in standing water in flooded ditches, alongside sarracenias (see bottom photo). We’ve now seen them in the wild in both North Florida and South Carolina, where they grow in calcareous-formed soils. In the garden, they thrive in an array of slightly acidic soils as long as the soil is reasonably moist.
Last week, Patrick, Zac, and I spent a couple of day botanizing in the low country…i.e. Coastal South Carolina. In between swatting away the incredible troupe of mosquitos which chose to join us, we were able to capture a few images to share below.
The ancient lime sinks are fascinating. Here, old sinkholes due to subsurface limestone rock breakdown have collapsed, forming natural depressions, creating a habitat for our native pond cypress (Taxodium ascendens) and other fascinating wetland species…like alligators. Yes, we did see several, but they were too fast for our camera.
The high water marks are visible on the buttressed trunks of bald cypress.
Much of the region is, or was, a pine/grass habitat. The pines could either be longleaf (Pinus palustris) or slash pine (Pinus serotina) .The dominant grass is known as wiregrass, aka: Aristida beyrechiana.
On the dry sand ridges, we saw these piles of fresh sand adjacent to a nearby tunnel entrance. These are homes to the rare gopher tortoise, which live in the region. Patrick tells me these tortoises will use the same underground lair, which may stretch 40′ long and 10′ deep, for up to 60 years.
Gopher tortoises only emerge from their tunnels when temperatures are between 80 and 90 degree F. Sure enough, we were able to wait and get some images of these amazing creatures.
Another surprise spotting was a bright orange mutant katydid. Our entomologist Bill Reynolds tells me these are crazy rare, and worth well north of $1000 to collectors. Who knew?
Yes, we also saw some cool plants. Asclepias obovata is a little-known milkweed that’s quite rare in South Carolina, so it was great to catch it in flower.
At another site nearby, we caught some late flowering plants of Asclepias tuberosa var. rolfsii.
We visited several patches of amazing pitcher plants, one site with a tremendous variation of Sarracenia flava, which is typically solid yellow. Other sties had three species growing side by side including Sarracenia minor, Sarracenia rubra, and Sarracenia flava. It’s great that such natural area still exist, although they are always in danger from those who sadly dig plants from the wild for sale.
A plant often seen near the pitcher plants is the native orchid, Plantanthera ciliaris.
We were thrilled to find a couple of large patches of the scrub palm, Serenoa repens, from one of the coldest natural populations, which happened to be in full seed. Clonal patches like this are incredibly slow-growing. Researchers in Florida found that such clonal patches are often between 5,000 and 10,000 years old.
It was great to see large drifts of one of our finest native ferns, Thelypteris kunthii, aka: maiden fern. This superb deciduous fern thrives in both sun and shade, tolerating everything from wet to average soil conditions.
A lovely surprise was stumbling on a population of Hamamelis henryi. This coastal species is often listed as a variety of Hamamelis virginiana, but we think it’s probably deserving of species status. Several of the clones we found had lovely dusty blue foliage.
One of the most amazing shrubs was the hawthorn, Crategus munda var. pexa. These ancient specimens topped out at 4-5′ tall, and looked like ancient bonsai specimens.
I’ve long had a penchant for finding gold leaf sweet gums, and this trip added another one to the list. When many woody plants are cut to the ground, they are much more likely to produce mutations as they re-sprout. In my experience, the genus Liquidambar must be the most prone to such mutations.
The fall-flowering Georgia savory, Clinopodium georgianum was in full flower. We’ve grown and offered this for decades, but it was fascinating to see the flower color variation in the wild.
At one stop, we found five different liatris species, including the little-known Liatris elegans.
The native vining legume, Centrosema virginiana, aka: butterfly pea, was in full flower and looking lovely…first cousin to the better known genus, Clitoria.
I’m not a fan of most smilax species, but I was quite smitten by the non-running dwarf Smilax pumila, which grew in the shade like an Asarum (wild ginger). While some clones had green leaves, others had patterns every bit as good as the best Asarum.
On the ride home, we kept ourselves amused unscientifically researching the fastest speed at which leaf-footed bugs could hold onto a car window while copulating. Since our test speed topped out at 65mph, we aren’t sure what it was take to pry these loose, but perhaps someone should research how they are able to hold on so tight, as I’m sure it has numerous industrial applications.
We were saddened this past week to hear of the passing of our friend, Dr. Larry Mellichamp, age 73, after a three year battle with bile duct cancer. I first met Larry in the late 1970s, when he spoke to our Horticulture Club at NC State. Over the next 45 years, we interacted regularly, mostly during his visits to JLBG.
Knowing that Larry was in the battle of his life, we visited him at his wonderful Charlotte home garden last year (photo below). Even while he was ill, his wit remained razor sharp, and his humor as dry as the Sahara desert.
Not only did Larry teach for 38 years (1976-2014) at UNC-Charlotte, but he also managed the 10-acre UNC Charlotte Botanical Garden, which he turned into a must-see horticultural destination. Larry was a huge advocate of interesting plants, especially US natives. He was constantly dropping off new plants for us to propagate and share with a wider audience.
Larry was best known worldwide for his work with carnivorous plants, particularly with the genus Sarracenia. His “little bug” series, (Sarracenia ‘Lady Bug’, ‘June Bug’, ‘Love Bug’, and ‘Red Bug’, released in 2004, was the first widely marketed collection of pitcher plants, from his breeding work with the late Rob Gardener. In 2021, Larry was the recipient of the Lifetime Achievement Award from the International Carnivorous Plant Society…one of many such awards Larry received.
Larry was also a prolific writer. His books include: Practical Botany (1983), The Winter Garden with Peter Loewer (1997), Wildflowers of the Western Great Lakes Region with Wells/Case (1999), Bizarre Botanicals with Paula Gross (2010), Native Plants of the Southeast (2014), and The Southeast Native Plant Primer with Paula Gross (2020).
Larry and I connected on many levels, but we were both strong advocates for making rare native plants available for propagation and commercialization…something that is sadly the exception in the current world of botany. We hope others in the native plant community pick up the torch.
Larry is survived by his wife of 48 years, Audrey, his daughter, Suzanne, and a host of plants he spread throughout the world. Life well lived, my friend.
Memorial donations may be sent to the Foundation of the Carolinas for the “Mellichamp
Garden Staff Enrichment Fund”, 220 North Tryon Street, Charlotte, NC 28202. For bank transfer instructions contact email@example.com or 704-973-4529. All are invited to share memories and photos of Larry at https://link.inmemori.com/mDPxXH . A public memorial service will be planned for October at the UNC Charlotte Botanical Gardens. Look for an announcement on their website.
We think Juliet would agree that Cuthbertia rosea is one sweet perennial. Looking great now is the southeast native (Maryland south to Florida) spiderwort, Cuthbertia rosea, which for us, begins its flowering season in spring, and continues sporadically through the summer months. Native primarily to dry sand, this easy-to-grow perennial has exceptional drought tolerance. Like all spiderworts, the flowers open in the morning and close each evening.
This poor plant has long suffered from an identity crises due to dueling taxonomists. This poor plant is also known as Callisia rosea, Tradescantia rosea, Phyodina rosea, and finally Tripograndra rosea. Despite the naming conundrum, it’s surprising that more people don’t grow this amazing plant.
One of the little-known of the native orchids is flowering now at JLBG. Habenaria repens, aka: water spider orchid, is the most widespread (NC to Texas) of the five native habenaria species. This charmer has been at home in one of our bogs for several years and has proven quite easy to grow. Hardiness is probably Zone 7b-10a, at least.
We love the miniature silver mats of Antennaria parviflora (little-leaf pussytoes). This little-known North American native (Canada south to Arizona) forms a tiny, 1″ tall groundcover that’s hard to the touch. In spring, the patch is topped with short fuzzy spikes of brush-like white flowers. The plant below, which measures 1′ in width, is only 18 months old from seed, and is growing in our rock garden in a well-drained mix of 50% Permatill. Hardiness is Zone 4b-7b.
As gardeners around the country are encouraged to plant more asclepias to encourage monarch butterflies, many folks are finding out that not all species of asclepias make good garden plants. As a genus, asclepias consists of running and clump forming species. There are number of horribly weedy garden plants like Asclepias speciosa, Asclepias syriaca, and Asclepias fasicularis. These plants are fine in a prairie garden, but are disastrous in more controlled home gardens.
One of our favorite clumping species is the easy-to-grow, Arizona-native Asclepias angustifolia ‘Sonoita’. This superb species was shared by plantsman Patrick McMillan. It has proven to be an amazing garden specimen, thriving for years, despite our heat and humidity. Did I mention it flowers from spring through summer?
Our clump of the native, Sabatia kennedyana just finished another amazing floral show. This fabulous, but easy-to-grow perennial has a truly odd native distribution on the coastal border of North and South Carolina, on the coastal border of Massachusetts and Rhode Island, and in Nova Scotia! I don’t think I’ve ever seen such an odd, disjunct range. Sabatia kennedyana is best suited for a sunny, slightly acidic bog, but regular garden soil will work fine, if it’s kept moist. I have no idea why this isn’t grown in every garden that has the correct conditions. Winter Hardiness is Zone 6-8, at least.
Most highly prized rock garden plants originated somewhere other than the Southeast US. One notable exception is Bigelowia nuttallii, or if you prefer common names, Nuttall’s rayless goldenrod. This fascinating plant resembles a whisk broom that just swept up a spilled bottle of mustard.
Named after English botanist/zoologist Thomas Nuttall (1786-1859), who lived in the US from 1808 until 1841, this fascinating plant, grown by rock gardeners worldwide, is native in only a few locations from Georgia west to Texas.
Bigelowii nuttallii makes a tight evergreen clump of needle-thin leaves, topped from mid-summer until fall with 1′ tall sprays of frothy yellow flowers…yes, those are actually flowers, but without the typical showy “rays”. Full sun for at least half a day, and good drainage are the key to success with this very easy native perennial. Hardiness is Zone 5a-9b.
Tired of trying to grow the conventional baby’s breath, that’s a prize perennial in the colder zones? We were, and had been looking for a substitute for years, when in 2000, one of our former staffers introduced us to the widespread native, Euphorbia corollata. Although it doesn’t look like much in deep shade where it’s often found in the wild, it explodes when given a bit of sun. Here are a couple of photos as it’s flowering season starts in mid-July.
Euphorbia corollata looks seriously gangly in a pot, so we’re confident you’ll never see this on the shelves of the box stores. Average moisture to very dry suites it fine. Although not a clumper, it’s spread it’s far from a thug, and is easy to remove it it happens to move too far. For a plant that’s native to every state East of the Mississippi (except Florida), and almost every single county, it’s shocking that every gardener isn’t growing this gem. Hardiness is Zone 3a-9b.
Here’s a photo this week of one of our favorite North American native plants, Juniperus horizontalis ‘Copper Harbor’. This would certainly add significant year round color interest to any native plant garden. In our trials, this is far and away the best of the golden Juniperus horizontalis cultivars. We offered this selection for a couple of years, but there seemed to be little interest.
We recently ran across this clump of the summer-flowering native (Canada south to Florida) orchid, Goodyera pubescens growing in a site near JLBG. Like a century plant, the flowering rosette dies after flowering, but new side shoots are produced for future generations. Work is being done to produce this in tissue culture so it can be made more widely available from nursery propagated stock. Sadly, most plants sold today are wild collected.
Of the 100 species of Goodyera orchid, only 4 are US natives.
This spring, Plant Delights introduced Zac Hill’s 2013 discovery of a new ruellia which he found in central Alabama. What we theorized might be a natural hybrid turned out to be a brand new species, as we were informed by botanists working on getting the plant published. We hope all native plant enthusiasts purchased this to both enjoy in their garden and for ex-situ (off site) conservation value. These are in full flower during the summer. Hardiness is unknown at this point, but we know it’s fine from Zone 7b – 8b, and most likely much further north.
We ran across this fascinating reticulated leaf form of the US native (every state east of the Mississippi) groundcover partridge berry (Mitchella repens) last week, when tromping through the woods near JLBG. We’ve taken a few cuttings that will be evaluated here for garden performance. In 60 years of botanizing, this is the first form we’ve seen with this nicely patterned foliage.
One of the most amazing summer perennials we grow is the native Berlandiera pumila ‘Chocoholic’. It is unfathomable to us, why this isn’t grown in every full sun garden where it’s winter hardy. The flowers, which smell like milk chocolate, top the 3′ tall clump nonstop from May until October. In the wild, Berlandiera pumila can be found from NC south to Texas, so its drought tolerance is excellent. We rate this as Zone 7a to 9b, but that’s only because we don’t have feedback from folks in colder zones yet. Please let us know is you have this survive temperatures lower than 0 degrees F without snow cover!
Gardeners interesting in attracting pollinators to the garden have no doubt experimented with one of the 20 native species of Pycnanthemum (mountain mint). While they are all lovely, most are too vigorously spreading to fit in a typical home garden. Enter Pycnanthemum flexuosum…the curvy mountain mint, is native from Virginia to Alabama, where it is found on moist to damp sites. This tightly clumping species is absolutely perfect for the garden, flowering now in July. This is our collection from Beaufort County, NC. We’ll be propagating this selection for a future PDN catalog. Hardiness is Zone 5-9a.
Another of our favorite early summer plants is the amazing southeast US native Dichromena colorata (aka: Rhynchospora colorata). Known by the common name, white-top star grass/sedge, this tough-as-nails groundcover can be found inhabiting moist ditches from NC to Texas. The floral show last for 1-2 months, depending on weather. Here, we have it growing in regular garden soil (sandy loam) amended with compost, and irrigated regularly. White-top sedge does spread, but not aggressively. Regardless, we’d recommend keeping away from nearby wimpy growers, which would be quickly consumed. Hardiness is Zone 7a and warmer.
We are in love with the long-flowering Thymnophylla pentachaeta var. pentachaeta ‘Laredo Gold’, which graces us with masses of gold flowers from spring through fall, in our sunny, dry rock garden. This Patrick McMillan collection comes from a population in Texas. Not only is this short-lived, southwestern US native reseeding perennial great in flower, but the native Navajo Indians also used it as a drug for people who want to dream of being chased by deer….we are not making this up!
While doing some local botanizing recently, we ran across this fascinating form of our native Christmas fern, Polystichum acrostichoides. Not only was it more compact than any others in the area, with more “orderly” fronds, but it also showed none of the typical terminal spore production that would be expected this time of year. Since this was from a future development site, the plant was rescued, and is now at JLBG under evaluation. The second photo is more typical plant for the species for comparison, growing at JLBG.
One of the most Jurrasic-looking plants we grow is the North American native Ostrich fern. If you moved here from “up north” and brought some of this fern with you, chances are it failed miserably. As a rule, Ostrich fern, Matteuccia struthiopteris, hates our summer temperatures.
Fortunately, back in the mid-1980s, retired UNC-Charlotte botany professor, Larry Mellichamp picked up a heat tolerant form from Powell’s Nursery in Princeton, NC, which he promptly introduced into the trade as Matteuccia ‘The King’. Without this incredible introduction, gardens in south would not have this amazing fern in their gardens.
This is a spreading fern that prefers average to wet soils, so allow plenty of room for it to spread. Below is a patch thriving at JLBG.
It only took us five attempts to figure out how to successfully grow the North American native, Stanleya pinnata. For those who haven’t met Stanleya pinnata, it’s a native woody perennial from the Westernmost States (North Dakota west to Southern California), so it really doesn’t find the rainy southeastern US to its liking. After several siting failures (learning experiences), we have finally found a location where it is thriving, a dry sloped berm in partial shade.
Stanleya was named after Lord Earl Smith-Stanley, The English 13th Earl of Derby (1775-1851) , who was quite a naturalist and president of the Linnean Society. This Lord Stanley wasn’t the only member of the Stanley family to have important items named in his honor. The NHL Ice Hockey trophy, the Stanly Cup, is named after his relative Lord Frederick Arthur Stanley (1841-1908), who was the son of Lord Edward Smith-Stanley, The 14th Earl of Derby, so it’s all in the family…Lord have mercy.
I love odd plants, and the southeast native Lachnocaulon (pronounced lack no colon) is about as odd as they come. This bog native, often found growing with pitcher plants, forms a mound that looks like a giant pin cushion. Here is a plant of Lachnocaulon anceps (NC west to Texas) in full flower this week at JLBG. Yes, those white round balls are the flowers.
Eighteen years ago, we introduced an amazing collection of the native Dicentra eximia from the West Virginia shale barrens that we christened for the nearby natural area, ‘Dolly Sods’. We found this amazing plant growing in pure gravel, in a bright sunny canyon that regularly saw summer temperatures in excess of 100 degree F.
We had struggled previously with other forms of Dicentra eximia, which is native all the way to the Canadian border. Not only did this seed strain thrive, but it did so in full baking sun. Here is a recent image of a clump growing beside an agave, where it thrives.
Clematis vinacea is a recently described species of non-vining clematis, published in 2013 by plantsman Aaron Floden. In the wild, it grows in a small region on the border of Eastern Tennessee/Northern Georgia. Closely allied to Clematis viorna/Clematis crispa, Clematis vinacea is a compact, non-climbing species. For us, it makes a sprawling mound to 18″ tall x 4′ wide that flowers from May through summer. In habitat, Clematis vinacea prefers a dry, alkaline site, but it has shown good adaptability to slightly acidic soils in our trials.
Looking good in the garden this week is the amazing fern, Dryopteris x australis. This rare fern is a US native…despite the confusing name, hailing from only a few scattered locations from Virginia west to Arkansas. In reality, the name “australis” means from the south. This splendid specimen grows in both sun and shade, and tolerates both wet and dry soils. Hardiness is Zone 5a-9b.
Here is a small sampling of the amazing array of flowers that are in the garden currently (late April/early May) on our pitcher plants. The genus Sarracenia is native to North America and hails from Canada south to Florida, where they are found in seasonally damp bogs. In the garden or in containers, they are incredibly easy to grow as long as they have moist toes (roots), and dry ankles (base where the crown meets the roots). Winter hardiness varies based on the species, but most are hardy from zone 5a to 9b.
Over the last few weeks, I’ve been working on a plant survey of a local woodland area of about 30 acres. The low, moist areas are filled with Arisaema triphyllum, (Jack-in-the-pulpit) which is quite common in our area. The first image is what is typical for the species.
I’ve been studying patches of Jack-in-the-pulpit for well over 55 years, always looking for unusual leaf forms that showed any type of patterning. Until last month, I’d never found a single form with atypical foliage. That all changed with my first trip to this local site, where so far, I have found several dozen forms with silver leaf vein patterns. Up until now, there are only two pattern leaf forms of Arisaema triphyllum in cultivation, Arisaema ‘Mrs. French’ and Arisaema ‘Starburst’.
Each patterned leaf clone varies slightly as you would expect within a population including both green and purple stalk coloration.
While I’d never found any true variegation prior to this, I had found plenty of transient leaf patterning caused by Jack-in-the-pulpit rust (Uromyces ari triphylli). This site was no exception, with a number of plants showing the characteristic patterning. If you find these, turn the leaf upside down and you’ll see the small orange rust pustules.
While these may seem exciting, the pattern are not genetic and will disappear without the fungus. Fortunately, this rust can be cured by cutting off the top of the plant and discarding it where the spores can not spread via the wind. Infected plant should be fine, albeit smaller next year. The susceptibility of Arisaema triphyllum to jack-in-the-pulpit rust varies with genetics. Of the tens of thousands of plants I observed at the site, less than 10% were infected with the rust.
Iris ‘Gerald Darby’ is one of those iris that doesn’t even need to flower to be garden worthy. Here it is in our garden this week, emerging with its’ purple leggings. This gem is a North American native hybrid of Iris versicolor and Iris virginica, known as Iris x robusta. This introduction of Iris breeder Gerald Darby was actually named for him after his death by another iris breeder R.H. Coe of England. Iris x robusta ‘Gerald Darby’ is equally at home growing in standing water as it is in typical garden soil. Hardiness is Zone 4a-9b.
We’re just back from a quick outing to the Flower Hill Nature Preserve in Johnston County, NC…just a few miles from JLBG. This unique coastal plain site contains remnants of species more common in the NC mountains, nearly 5 hours west. The top of the bluff is a small stand of enormous Rhododendron catawbiense, while along the bottom of the hill is a bank of the deciduous Rhododendron canescens.
In the mid-slope area, we found Cypripedium acaule (pink ladyslipper orchid), just waiting to be photographed. Sadly, it’s one of the most difficult species to transplant, so just enjoy these in situ when you find them.
There were beautiful masses of the evergreen groundcover galax, growing on the eastern slope.
It was particularly great to see the Asarum vriginicum in full flower. True Asarum virginicum is rarely seen in cultivation, and the diversity of flower color was outstanding.
We are just starting with the first wave of Cypripedium (ladyslipper orchids) in the garden this week. One of the earliest selections to put on a show is Cypripedium ‘Rascal’, an outstanding cross of Cypripedium kentuckiense and Cypripedium parviflorum var. parviflorum…all US natives.
Here’s a fun combination this from the garden this week, where we combined two three-leafed plants together…a silver leaf Trillium cuneatum with the hardy purple-leaf shamrock, Oxalis triangularis. You can have all kind of fun making these little vignette combinations in your garden, using your school colors, or any other design scheme that suits your tastes.
We love all of our trout lilies, but Erythronium ‘Goldstrike’ is hard to beat. This is our named selection of Erythronium americanum ssp. harperi. Occurring from Tennessee south of Mississippi, this amazing form graces low woodlands in very early spring. This collection was made by our Plant records/taxonomist, Zac Hill in Alabama. Hardiness is Zone 6-9 at least.
Antennaria solitaria, the solitary pussytoes is looking great in the garden this week. This amazing native groundcover hails from Ohio south to Alabama, where it can be found in open shade or part sun, but always in dry soils. Despite being native in acidic soils, our plants below are thriving in our alkaline crevice garden.
We love intermingling plants, often planting more than one type in the same space, where their growth habits allow them to comfortably co-exist. Here is a three year-old planting where we used ‘Gold Queen’ Hyacinth among a patch of our North American native groundcover juniper, Juniperus horizontalis ‘Bar Harbor’. Despite what many folks seem to think, there are no laws that plants in the garden can’t touch each other, so how about some more hand-holding in the garden.
When people think of trilliums, they usually think of the cold north, but states like Florida are also home to four species of trilliums which all thrive throughout the southeastern states. Here are two of the earliest species to flower in our garden.
The first is Trillium maculatum ‘Kanapaha Giant’ from Alachua County. This is consistently the earliest trillium to emerge and flower for us. This is followed close behind by Trillium underwoodii. Both of these are usually in flower by early February.
Asarum minus ‘Cupid’ is one of our heavily silver patterned selections of our native wild ginger. When cold weather arrives, the evergreen leaves take on a lovely purple cast. This is an excellent clonal selection we made in 1994 from a construction site, and one we hope to offer in the future though Plant Delights Nursery.