Reflecting on Summer in the Pineywoods

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S-banded Tiger Beetle

With the arrival of our first “real” cold front of the season, and temperatures in the extended forecast barely creeping out of the 60s, I think it’s safe to say that fall has arrived.  The forests are full of fungi and fall-blooming asters.  And just the other day I found several Marbled Salamander, a true harbinger of fall.

But before I set out to bask in the beauty of Autumn, I find myself thinking back to a summer spent in the forests of my home.  This year’s was a particularly hot, dry summer.  After a few years of relatively mild summers, at least in terms of Texas, this one was intense.  Yet even in the midst of heat waves and drought there are natural treasures to be found by those willing to look.

I found one such treasure on a sweltering day in late June.  On the advice of my friend Joe Liggio, author of Wild Orchids of Texas, I went to check on a local population of Crest Coralroot Orchids (Hexalectris spicata).  This is a wide ranging species, occurring from Arizona to Florida to Virginia.  In Texas they occur in scattered populations throughout the state, with the most robust populations being in the White Rock Escarpment of north-central Texas, the Edward’s Plateau, and the mountains of the Trans Pecos.  In the Pineywoods they are only known from a few localized populations.  Here they are generally found singly, or in small, scattered clumps.  This year however, we found a huge clump of over 30 stems.

The Crested Coralroot is a non-photosynthesizing mycoheterotroph, meaning that it lacks chlorophyll and has no real leaves to speak of.  It lives out its days a little more than an underground rhizome and small roots that penetrate the mycorrhizal fungi of tree roots in order to rob them of a portion of their energy and nutrients.  All that alerts the average forest-goer to their presence is the flesh colored flowering stalk and purple-streaked flowers that emerge all to briefly in the early summer.

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Crested Coralroot

Emerging from forest floors rich in decomposing organic material in early June is the Ox Beetle (Strategus aloeus).  These massive coleopterans are among the largest insects in the United States.  The pronotums of males are decorated with three horns that are utilized in combat to win the favor of females.  These massive beetles are familiar visitors to porch and gas station lights on warm, humid, moonless summer nights.

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Male Ox Beetle

Another, much more occasional, visitor to night lights is the assassin bug known as Microtomus purcis.  So named for their tendency to ambush other insects and dispatch them with their long spear-like beak, assassin bugs come in a variety of shapes, sizes, and colors.  Microtomus purcis is one of the largest, and most striking.  When not visiting man-made lights in errors, they spend much of their time hidden beneath the bark of rotting tree trunks.

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Microtomus purcis

We spent much of July away from the Pineywoods, visiting the sky islands of West Texas and the beaches of the Upper Texas Coast.  I could not resist, however, seeking out the brilliant orange Platanthera orchids that light up the bog like tiny torches.  There are four species in Texas, however this year I would only photograph two of them.  Interestingly, I would find them both on the same day.

In late July we traveled to the Big Thicket, where deep in a mosquito infested baygall I spotted the brilliant inflorescence of the Crested Fringed Orchid (Platanthera cristata).  This is perhaps the second rarest of our Platanthera species, only known from a few sites in the central and southern Pineywoods.  In Texas they seem to prefer the shaded, highly acidic conditions of forested seeps, occurring either on their margins or interiors.  I have also found them at acidic seeps along springfed streams.  They are generally in the company of a variety of ferns, and other forest seep specialists like Nodding Nixie (Apteria aphylla).  This seemed a good year for them.  I often wonder what triggers an orchid bloom, as some years none will bloom, other years only a handful, and that rare year where many will bloom.  Rainfall no doubt plays some important roll, but as to when the rain should fall to trigger the bloom and what other factors may contribute, I am at a loss.

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Crested Fringed Orchid

After leaving the baygall we traveled east to a wetland pine savannah where we found the enigmatic Chapman’s Fringed Orchid (Platanthera chapmanii).  P. chapmanii occurs in scattered populations in Texas, Mississippi, Florida, Georgia, and North Carolina.  It is believed by many to have arisen from an ancient hybrid of P. cristata and P. cilliaris, seeming to display characteristics of both.  It can be differentiated from the former by its long beard and reflexed lateral sepals.  It differs from the latter by its hooked columns.  In Texas P. chapmanii is known from a few remnant wetland pine savannahs in the Big Thicket.

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Chapman’s Fringed Orchid

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Chapman’s Fringed Orchid in a wetland pine savannah

Growing alongisde the Chapman’s Orchids were a variety of carnivorous plants, including the conspicuous Pale Pitcher Plant (Sarracenia alata).  The leaves of these carnivores, known as pitchers, are hollow and form long tubes with pools of digestive enzymes at their base.  Unsuspecting insects that enter the pitchers may become trapped in the enzyme soup, where they are slowly digested, nourishing the plants.

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Pitcher Plants in Love

In early August Caro and I found ourselves in pursuit of another orange beauty, the Carolina Lily (Lilium michauxii).  Uncommon in Texas, the Carolina Lily grows in rich, mature forests, generally on hardwood slopes, though it may occur on rocky slopes dominated by Longleaf Pine.  We actually spotted our first lily of the season growing along a county road in a remnant patch of forest surrounded by pine plantations.

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Carolina Lily

A few days later we went to visit a population that Caro had spotted last year long after antithesis.  This year we found them in full bloom, and even spotted one plant that had three flowers, something I had never seen before.

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Carolina Lily

Carolina maintains our garden, which is full of a variety of native plant species.  A benefit to a diversity of native plants in our yard is that we are able to attract a variety of native pollinators.  And with the pollinators come the predators.  In essence we get to observe the food chain in action every day.  One of my favorite back yard predators is the Widow Skimmer, which stalks the garden and occasionally pauses for a brief photo shoot.

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Widow Skimmer

One of my favorite summer past-times is wandering along the numerous clear, cold, springfed streams that transect portions of the Pineywoods.  There is so much to see beneath the water, along the banks, and in the surrounding forests.  It was on the banks of one such stream that I spotted these striking red fungi.

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Fungi

Late summer brings with it a peak in tiger beetle activity.  Undisturbed beaches along streams and rivers may literally be swarming with a variety of species, voraciously chasing down any prey item unfortunate enough to get in their path.  One species, the S-banded Tiger beetle (Cicindelidia trifasciata) was historically considered a species of the coast, however in recent years it has been found along waterways hundreds of miles inland.  In the Pineywoods it is now quite common in many areas.

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S-banded Tiger Beetle

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S-banded Tiger Beetle

The Bronzed Tiger Beetle (Cicindela repanda) is a wide-ranging, somewhat variable species.  Their elytra may appear dark brown, coppery, or even golden under the right light conditions.  They are commonly encountered on sandy stream banks and sandbars of streams and rivers.

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Perhaps the most commonly encountered Tiger Beetle in the Pineywoods is the Ocellated Tiger Beetle (Cicindelidia ocellata).  Unlike most species of the Pineywoods, which are characteristically eastern and at the western edge of their range, the Ocellated Tiger Beetle is primarily a species of the southwest and reaches the eastern limit of its range here.

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Ocellated Tiger Beetle

A visit to my good friend James Childress‘s farm is always good for turning up a few invertebrates.  The plants and woodpiles along his cabin harbor rich arachnid diversity, and we are always treated to a wealth of spider sightings.  Perhaps the most entertaining of all of the farm’s eight-legged denizens is the Bold Jumping Spider (Phiddipus audax).

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Bold Jumping Spider

Under a chair on James’s patio we found this large female Black Widow (Latrodectus mactans).  Perhaps the most famous/infamous spider in the country, the Black Widow has a reputation of being dangerous and ruthless due to its potent venom and tendency to cannibalize males seeking mating opportunities.  In reality, they are docile, gentle creatures disinclined to bite.

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Black Widow

As August turned to September, my friend Scott Wahlberg spotted something truly remarkable.  Deep in a mature hardwood stream bottom he caught a glimpse of a massive Canebrake Rattlesnake (Crotalus horridus) that we estimated to be pushing five feet in length and as thick as my upper arm.  Finding this snake was a reminder that all manner of fantastic creatures are hidden deep in the forest, many of which will never be seen by visitors to their woodland realm. We were fortunate, however, to see one of these elusive forest spirits.  In a time and place when so many seem determined to wipe these beautiful animals out based on unfounded fears and ignorance, it is nothing short of incredible that this snake would live long enough to attain such an impressive size. Spending a moment with this gentle giant truly was a gift from the forest.

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Canebrake Rattlesnake

Back at James’s farm the hummingbirds had arrived in force.  South-bound Ruby-throated Hummingbirds (Archilochus colubris) begin arriving in the Pineywoods in late summer.  Dozens of these tiny aerial acrobats were fighting for position among James’s feeders, eager to refuel and prepare for the continued journey south.

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Ruby-throated Hummingbird

Many shorebirds also pass through the Pineywoods in East Texas as they migrate south.  In early September while laying flat on a river sandbar photographing tiger beetles I caught a blur of motion our of the corner of my eye. Slowly I turned my head to focus on this new distraction, and saw that it was a Spotted Sandpiper (Actitis macularis) darting back and forth in pursuit of invertebrate prey. Though the bird was only about 25 feet away, it was still too far for my macro to reach. Slowly I crept backwards, and then made my way to my truck to seek out my telephoto lens. I could only hope that the tiny hunter would stick around. As I retreated I watched the shorebird make several mad dashes in the area I had just left, undoubtedly snatching up some of the tiger beetles I had just been observing.

I made it to the truck and equipped my bird lens. I then cautiously made my way back to the sandbar. At first I couldn’t see the sandpiper, but after some time it became visible behind a small rise in the sand, tail a-bobbing. I got into the water and laid flat, trying to conceal as much as my form as possible. I slowly moved toward my quarry, and found it to be surprisingly tolerant. Most shorebirds are in their basic, or non-breeding plumage this time of year. In the Spotted Sandpiper, I find this look to be just as striking as its breeding plumage, particularly the fine details on the wing coverts.

I watched the sandpiper through my lens as it moved up and down the edge of the sandbar, stalking and pouncing on prey, and flipping leaves and other bits of cover to see what tasty morsels might lie beneath. After it had scoured most of the sandbar’s perimeter it took off upriver, flying southward with its characteristic erratic wingbeats. I was left with a few images and a fine memory of an unexpected encounter of the best kind.

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Spotted Sandpiper on the prowl

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Spotted Sandpiper

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Spotted Sandpiper

I can’t say that I’ll miss the summer heat, but I will miss many of the familiar species that vanish for the year as summer turns to autumn.  I can’t be too sad, however, as each season in the Pineywoods has a unique cast of characters, and each year I look forward to seeing familiar faces and those that I have not yet had the pleasure of meeting in these wonderful, diverse forests.

August and September Recap

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Sacred Datura

Between August 1 and September 30 I was able to cross 5 more species off my list, 3 of which came from another trip to the Davis Mountains:

Mountain Adder’s Mouth (Malaxis macrostachya)

Wood’s Jewel Scarab (Chrysina woodii)

Mountain Short-horned Lizard (Phrynosoma hernandesi)

Gulf Blazing Star (Liatris tenuis)

Barbed Rattlesnake Root (Prenanthes barbata)

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Although we spent most of our time during our August trip to West Texas in the Davis Mountains, we camped the last night on the shore of Lake Balmorhea.  I found the Sacred Datura (Datura wrightii) pictured above right at daybreak as I explored the area around our tent.  The flowers of the Sacred Datura are primarily pollinated by large sphinx moths.  As a result they open in the late evening and close in the early morning.  Sacred Datura has a long history of significance for the people of the southwestern U.S. and Mexico. It is well known for its potentially lethal toxicity. However it has also been used extensively for medicinal purposes. The plant was also used by many native tribes in religious ceremonies, often to induce visions.due to its hallucinogenic properties. Unfortunately, the potency of its toxins resulted in the death of many of its users.

On the drive home we stopped at a few rock outcrops to help break up the drive and stretch our legs.  It was at one of these outcrops that we spotted the Cory’s Dutchman Pipe (Aristolochia coryi).  In the U.S., this bizarre plant can only be found in central and western Texas.

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Cory’s Dutchman Pipe

Back in East Texas, my friend James Childress and I went looking for some late summer wildflowers.  Two of my favorites are the Yellow Fringed Orchid (Platanthera ciliaris) and the Carolina Lily (Lilium michauxii).  Both species are uncommon in East Texas.  P. ciliaris occurs in herbaceous seeps, baygall margins, and occasionally wet ditches and prairie remnants.  L. michauxii primarily occurs on the upper slopes of rich mesic ravines, often near the transition zone between slope and upland.

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Yellow Fringed Orchid

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Carolina Lily

While hunting for wildflowers James spotted a most interesting creature.  The Giant Ichneumon (Megarhyssa macrurus) is a large parasitic wasp with extremely long ovipositors.  They use these ovipositors to probe tunnels created by the larvae of horntail wasps.  Horntails bore into the wood of dead and dying trees.  The female ichneumon seeks out these larvae and with her ovipositor and lays her eggs on or in them.  Her own larvae then parasitize the horntail larvae.  The young ichmeumons will feed only on the horntails, killing them in the process.  They will then pupate and emerge as adults from the tunnel that their host created for them.

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Giant Ichneumon

In late August Hurricane Harvey passed through East Texas and dumped unprecedented amounts of rain on the region.  Following the storm, James and I went looking for reptiles and amphibians, hoping that they would be active following the prolonged period of moisture.

We found a number of Southern Copperheads (Agkistrodon contortrix), the most attractive of which is pictured below.

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Southern Copperhead

Among the amphibians observed was this enormous Gulf Coast Toad (Incilius nebulifer).

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Gulf Coast Toad

The prolonged rainfall brought out scores of Hurter’s Spadefoots (Scaphiopus hurteri).  These interesting frogs can be extremely abundant in certain areas, but require specific habitat conditions.  These conditions typically consist of areas with deep, undisturbed sand where they can burrow and aestivate during the hottest and driest part of the summer.  This species emerges only after heavy rains, where they may breed by the thousands in small ephemeral wetlands that may be little more than a puddle.  The tadpole stage for these spadefoots is among the shortest of any frog, requiring as little as two weeks to go from an egg to a froglet capable of leaving the water.  This short larval stage is an adaptation to allow them to breed in areas were the presence of water is a limiting factor, and allows them to breed in areas that other species are not capable of utilizing, effectively eliminating the competition.

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Hurter’s Spadefoot

September is perhaps the best time to visit Catahoula Barrens.  Wildflowers such as Texas Blazing Star (Liatris mucronata) and Nuttall’s Rayless Goldenrod (Bigelowia nuttallii) bloom in mass.  Downy Lobelia (Lobelia puberula) is fairly common in wetter areas along the margins of the barrens.

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Downy Lobelia

Small-flowered Fameflower (Phemeranthus parviflorus) occurs sporadically in Catahoula Barrens.  The flowers of this interesting succulent open in late afternoon.

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Small-flowered Fameflower

I leave you with this final shot of a Catahoula Barren.  I captured this shot at dusk and tried to highlight the rich diversity of colors that can be found in these incredible landscapes.

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Catahoula Barren