The Land of the Endless Sky

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Rolling Prairie in Hartley County near the Canadian River Breaks.

Texas is primarily a prairie state.  From the tallgrass prairies of the Gulf Coast to the Blackland Prairies and Cross Timbers and Prairies; and from the semi-arid grasslands of the Trans-Pecos to the Llano Estacado and the shortgrass prairies of the Panhandle Plains, the Lonestar State is largely defined by these graminoid-dominated communities.  Despite all of this, our native prairies are all but gone, victims of a relentless onslaught of change.  Much of our prairie was outright destroyed, converted to agricultural crops or development.  Others suffered from the removal of important disturbance elements like fire and the most iconic prairie denizen of them all, The American Bison.  At the same time these important components of prairie maintenance vanished, new, exotic species were introduced, forever changing the composition of the land.

Fortunately, there is still some good prairie left, for those who know where to look.  I have been lucky enough to see high quality virgin coastal prairies, some of the finest Blackland Prairie in the state, and the wildflower laden meadows of the Grand Prairie in spring.  Yet despite all of this, I had not spent time in the mid and shortgrass prairies of the panhandle since 2008, when I worked on a project researching Snowy Plovers in the playas and salt lakes around Lubbock.  This year I sought to change that, and Carolina and I spent a few days here on our big summer roadtrip.

Our first stop was the far northeastern corner of the Panhandle, where we went looking for milkweeds in Hemphill and Lipscomb Counties.  After a long drive from our Pineywoods home, we finally arrived to find the Butterfly Weed (Asclepias tuberosa) in full bloom.  This species is common around our home, but it was a different experience altogether seeing them growing in large clumps among the prairie grasses.

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Butterfly Weed in a midgrass prairie of the eastern Panhandle.

The Butterfly Weed was certainly exciting to see, but I had my heart set on a real Panhandle specialty – the Showy Milkweed (Asclepias speciosa).  It is a wide ranging species, occurring from the Great Plains west.  It barely enters Texas, where it can be found at a few sites in the Panhandle.  We were fortunate enough to find it growing among a variety of grasses and sedges in the narrow floodplain of a small stream feeding the Canadian River.

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Showy Milkweeds blooming along a small stream in the Canadian River drainage.

I don’t think I’m going out on a limb by saying this may be our most beautiful milkweed.  The plants may reach a meter or more in height and are adorned by huge clusters of bright pink flowers with elongated hoods.  They are very fragrant, and we observed a wide variety of pollinators seeking nourishment from their blooms.

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Asclepias speciosa flower detail

After spending time among the milkweeds, we trekked west across the Panhandle.  We chose to take the lesser-traveled county roads and were rewarded with scenes of blooming wildflowers and rugged topography.

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CoreopsisGaillardia, and Monarda bloom in a Panhandle prairie.

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Carolina Larkspur (Delphinium carolinianum) against a background of dried prairie grass.

While traversing the rugged Canadian River breaks, we spotted the unmistakable form of an Ornate Box Turtle (Terrapene ornata) in the road.  It’s hard to find a reptile with more personality than a good box turtle, and Carolina affectionately named this one “Manuelita”.  In my experience, there are two types of box turtles, those that seal themselves in with their hinged plastrons, and those that make a break for it. Manuelita was definitely the second type, and as soon as we put her on the ground she took off like a bullet, or at least a turtle’s version of a bullet.  I would not have been able to capture a singe photo of her if it were not for Carolina, who was able to read her body language, and gently calm her down enough that she would sit still for a brief time.  After a brief photo session, we watched as she vanished into the prairie, moving quickly away from the road.

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Ornate Box Turtle

From there we made our way to the Rita Blanca National Grasslands near the borders with Oklahoma and New Mexico. Our first evening camping here brought with it rapidly darkening skies of a blue norther that foreshadowed the violent storm to come. The wind hit first, creating turbulent waves in the sea of prairie grass. When the rain and lightning arrived, we retreated to the tent and huddled in our sleeping bags. The temperature dropped into the lower fifties, and through the rain fly of the tent we could see champagne pink flashes illuminating the darkness, and hear, or rather feel, the bone jarring thunder that followed. The wind was so strong that the tent walls flexed and the ceiling dropped several feet. I wondered if it would hold up, but when the storm passed the old sturdy ‘gal who had seen us through many adventures remained standing.

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Blue Norther approaching the Rita Blanca Grasslands

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Blue Norther approaching the Rita Blanca Grasslands

As the rain calmed to a gentle drizzle we decided to take to the roads to see if we might turn up some amphibians en route to their breeding wetlands. It turned out to be a productive evening, and we found several Bufo cognatus, Bufo woodhousii, and Spea bombifrons. I only photographed a single B. cognatus that appeared to be heavily gravid. It is amazing that organisms that rely so heavily on water can be so abundant in a place where it seems so scarce.

It was a humbling experience to be at the mercy of such a force of nature so powerful and destructive as that blue norther, and to see the vital role it played in ensuring the survival of so many species.

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Great Plains Toad (Bufo cognatus)

The next morning I had ambitions of rising early and photographing the sun rising over the prairie. When my alarm went off at some painful hour, however, I woke to the sound of gentle raindrops bouncing off the tent’s rain fly. It was the perfect sound for sleeping, so I drifted back asleep and woke again some hours later.

We went out into the damp morning to see if the rains may have spurred some animal movement. After a few miles, Caro spotted a nice Pronghorn (Antilocapra americana) buck on a yucca-laden hillside. It looked at us for a moment, and took off running to the crest of the hill. A pronghorn in motion is a beautiful thing. Their movements are so fluid-like and effortless. There is nothing on this continent’s land that can match their speed, and their aloof attitude makes one think that they know it.

We moved forward along a curve in the road to try to get a closer look at the buck where the ridge intersected our path. There he stopped for a moment to mark his territory and again took to running. It became evident that he was stopping every hundred yards or so and scent marking. Caro postulated that perhaps he was concerned that the rains had washed his scent from his territory.

We watched him cross the road and find a small gap in the fence. From there he disappeared over the distant horizon. In all we probably spent 10 minutes or more watching him, and I managed an image of him mid-gallop.

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Pronghorn Buck

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Pronghorn Buck

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Pronghorn Buck Running

The wildflowers were looking rejuvenated after the rain.  In fact, the cool, wet spring and the region had experienced resulted in a verdant paradise of grasses and forbs.  I delighted in photographing a single Prairie Snowball (Abronia fragrans) plant.  The specific epithet fragrans is appropriate, as the flowers emit a wonderful aroma into the early morning air.  Like many species of Abronia, it is often pollinated by nocturnal moths, and the flowers open in the evening and generally close by mid-morning.

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Prairie Snowball

The Plains Penstemon (Penstemon ambiguus) was at peak bloom, decorating the prairie with patches of pink and white.

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Plains Penstemon

We also found a few late flowering patches of White Penstemon (Penstemon albidus).  Some had a slight hint of purple to the blooms.

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White Penstemon

With such an abundance of wildflowers, the pollinators were out in force as well.  The most striking were the striped-sweat bees (Agapostemon sp.) that were feeding on the abundant thistles.

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Striped-Sweat Bee

The Rita Blanca National Grassland is a haven for grassland birds. Many of the species that occur here are declining at an alarming rate as the prairie habitat they depend on vanishes or changes to a degree that it can no longer support them.

We drove slowly with the windows down so that we may hear them. Western Meadowlarks, Cassin’s Sparrows, and Horned Larks sang from the fence posts. We saw Burrowing Owls taking advantage of the numerous Black-tailed Prairie Dog towns scattered throughout the plains. We watched Greater Roadrunners dart along the primitive grassland roads as we listened to the distant whistling of Northern Bobwhites.  Small, isolated woodlots provided a haven for birds like Bullock’s Orioles, Western Kingbirds, and Red-headed Woodpeckers. 

At one point we were dive-bombed by aggressive Long-billed Curlew’s, a sure sign that they had a nest nearby. In Texas, these remarkable shorebirds only nest in the extreme northwest corner of the panhandle, which is close to the southern extent of their breeding range. Their nest was on the opposite side of a fence that we didn’t cross. Though the land was still public, I didn’t want to risk damaging the superbly camouflaged eggs which are laid in little more than a depression in the dried grass.

I photographed at Lark Sparrow (Chondestes grammacus) as it foraged in the short grass, and was fortunate enough to photograph an iconic prairie bird, the Grasshopper Sparrow (Ammodramus savannarum), as it sang its hissing song from atop the fading blooms of a yucca. The birds alone would be worth the trip, but they were only one part in an incredible community of plants and animals that captivated my every moment in this special place.

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Lark Sparrow

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Grasshopper Sparrow

Among the numerous grassland birds is an elite killer, and a “respectable prairie raptor”, as my friend and U.S. Fish and Wildlife Service biologist Matt Whitbeck would say: The Swainson’s Hawk (Buteo swainsonii).  These open country specialists undertake one of the most impressive migrations of all raptors, breeding in western North America, as far north as Alaska, and wintering in Argentina.  During migration they may form large “kettles”, delighting bird watchers as they pass overhead en masse.  They take a variety of prey on their summer hunting grounds, including prairie dogs, ground squirrels, rabbits, and even Burrowing Owls.

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Swainson’s Hawk

As the rising sun warmed the prairie, we caught sight of a special creature scampering across an open patch of prairie soil.  It was a Texas Horned Lizard (Phrynosoma cornutum), our state reptile, and one of the most famous icons of the Texas prairies.

Texas Horned Lizards have declined or disappeared throughout most of the state, however they continue to thrive in parts of the Panhandle and Trans Pecos. We saw several scurrying about in the late afternoon. These tiny dragons feed primarily on ants, and will often sit near a harvester ant mound picking off foragers as they move to and from the colony entrance.

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Texas Horned Lizard

Viewing a Texas Horned Lizard from above reveals its incredible and intricate patterns and textures.

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Texas Horned Lizard

It was a bittersweet feeling when our time at the Rita Blanca National Grassland came to an end.  It meant saying good bye to the prairies of the Panhandle, but it also meant we would be continuing our journey westward into the Land of Enchantment.  My time in the Panhandle Plains left me enamored with the landscapes and specialized flora and fauna of the area.  It is a long drive from the Pineywoods, but one I will gladly make again.  Until then, I will dream of incoming blue northers, running pronghorn, and the dawn chorus of grassland songbirds.

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Rock Outcrop in Potter County

 

 

May Recap

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Gulf Crayfish Snake

May saw four more species crossed of my 2017 list of biodiversity goals, including my first animal.  While I am lagging behind on my list, I was able to capture images of some interesting species not on my list, as well as some beautiful landscapes.  The following are the target species I was able to photograph in May:

Smooth Jewelflower (Streptanthus hyacinthoides)

Centerville Brazos Mint (Brazoria truncata var. pulcherrima)

Purple Bladderwort (Utricularia purpurea)

River Otter (Lontra canadensis)

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I explored a variety of habitats in May, however it was largely dominated by forays into a number of xeric sandhills.  Both the Smooth Jewelflower and Centerville Brazos Mint make their home in these unique communities, and more information can be found in their blog entries linked above.  The following images are of a pair interesting West Gulf Coastal Plain near endemics.

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Prairie Milkvine (Matelea cynanchoides)

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Scarlet Penstemon (Penstemon murrayanus)

Each year in May I look forward to visiting the wetland pine savannahs and hillside seeps of the Big Thicket.  This is the peak bloom time for the spectacular Grass Pink Orchid (Calopogon tuberosus).  In East Texas, they typically grow in the company of the carnivorous Pale Pitcher Plant (Sarracenia alata) which captures insects in its tubular leaves.  Here they are trapped and slowly digested to provide nutrients to the plant so that it may thrive in otherwise nutrient-poor soil.

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Grass Pink Orchids and Pale Pitcher Plants

While I was photographing the orchids, Carolina found this blooming Sweetbay Magnolia (Magnolia virginiana) at the margins of a baygall nearby.  The sweet aroma of these large flowers fills the air for much of May.

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Sweetbay Magnolia blooms at the margin of a baygall.

While exploring a wetland near my house I found a large patch of blooming Lizard’s Tail (Saururus cernuus).  Though I didn’t have my camera with me at the time, I couldn’t pass up the opportunity to photograph this scene, and returned later.  Lizard’s Tail grows in a variety of shallow wetlands.

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Lizard’s Tail blooms in a forested wetland.

We spent our fair share of time among the Longleaf Pines as well.  My friend James spotted this Slender Glass Lizard (Ophisaurus attenuatus).  The common name glass lizard comes from this genus’s propensity for caudal autonomy.  This is the familiar action of a lizard dropping its tail in response to a predator threat.  In the glass lizard, however, the tail makes up over half of its body, and contains several fracture points.  This can result in an individual seeming to break into pieces when being captured by a potential predator.  Though they may seem fragile, careful, gentle handling helps ensure that they remain in tact.  Though they are typically associated with sandy habitats, they are not proficient burrowers, but rather “swim” through dense grasses.

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Slender Glass Lizard

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Slender Glass Lizard

While on a gem/mineral hunting expedition Carolina and I spotted this Spicebush Swallowtail (Papilio troilus) nectaring on Butterfly Weed (Asclepias tuberosa).

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Spicebush Swallowtail nectaring on Butterfly Weed

The impressive blooms of the Giant Coneflower (Rudbeckia maxima) can sit atop stalks that might reach 8 feet tall.  R. maxima is endemic to the West Gulf Coastal Plain.  In East Texas it occurs in scattered populations in open woodlands and prairie pockets.

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Giant Coneflower

Carolina spotted this Black Swallowtail (Papilio polyxenes) while we were photographing Giant Coneflowers along the roadside.  To me this is one of our most beautiful larval insects.

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Black Swallowtail Caterpillar

Pointed Phlox (Phlox cuspidata) is primarily a species of Central Texas, however it enters Deep East Texas in the understory of Longleaf Pine Savannahs, where it is much less common.

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Pointed Phlox

Fire is an integral part of maintaining Longleaf Pine Savannahs.  In the image below Butterfly Weed can be seen blooming following a prescribed burn.

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Butterfly Weed blooms following a prescribed burn

I found this flowering Groundnut (Apios americana) in a park near my house.

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Grountnut

Growing near the Groundnut was this Anglepod (Gonolobus superosus).  This member of the milkweed family (Asclepiaceae) forms vines in open woods and forest edges.

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Anglepod

Our close friends James and Erin recently built a cabin on their 200+ acres in Angelina County.  The property contains pasture, fallow fields, mixed pine-hardwood forest, a forested stream, and several ponds.  It makes for excellent herping opportunities.  During our visit we went out to see what we might turn up.

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Eastern Mud Turtle (Kinosternon subrubrum)

I caught this large, attractive Yellow-bellied Water Snake (Nerodia erythrogaster flavigaster) at one of the ponds at night.  For those who have never caught a water snake, they are notoriously foul-tempered and have an extremely offensive musk, which they promptly rub all over their captor.  It makes handling them an unpleasant experience, but I’m glad we hung on to this one for photos the next day.

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Yellow-bellied Water Snake

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Yellow-bellied Water Snake

After catching we continued to walk along the pond.  It wasn’t long before Carolina called out that she had seen another snake.  I rushed to her spot and saw the head of a Gulf Crayfish Snake (Regina rigida sinicola) poking through the aquatic vegetation.  I quickly grabbed it.  We held onto it as well, and the next day we had a photo session with both snakes nearby.  When we were done, we released the snakes where we caught them.

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Gulf Crayfish Snake

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Gulf Crayfish Snake

May provided several excellent opportunities for nature observation and photography.  I look forward to what June will bring.

An Ode to Longleaf

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Longleaf Pine Savannah

Before I post a May recap, I wanted to pay tribute to one of our countries most unique and biodiverse communities, the Longleaf Pine savannah.  Over the past few years I have been slowly working on a manuscript for a book about East Texas.  This post contains an excerpt of that manuscript and some photos that I intend to include in the book.

Perhaps no tree better represents the Pineywoods than the longleaf pine (Pinus palustris), both in its historic influence over the landscape and its eventual plight.  It most often made its presence known in extensive savannahs, where widely scattered individuals might have lived to be 500 years old, reaching diameters pushing four feet, and stretching well over a hundred feet toward the sky.  Once ranging across the southeast, from Virginia to East Texas, the king of the southern pines has been reduced to less than 5% of its native range, and has disappeared across the vast majority of its range in Texas.

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Longleaf Pine Savannah with Little Bluestem

Remnants of the fire-loving conifer and the habitats it defines can still be found, however.  In the northern part of its range in Texas, which includes Sabine, San Augustine, Angelina, and northern Jasper and Newton Counties, it primarily occurs in rolling uplands.  In areas that are managed with regular prescribed fires, one catch a glimpse of the great longleaf pine savannahs of the past.  These were perhaps the most biodiverse communities in the southeast; a unique area where prairie and forest mingled.

Occurring on sands of moderate depth, these sprawling forests are kept free of woody understory encroachment by regular fires.  The fire-tolerant longleaf pine thrives in the face of the flames, while most other species die out.  However, on occasion hardwoods such as blackjack oak (Quercus marilandica), Southern red oak (Quercus falcata), Post oak (Quercus stellata), sassafras (Sassafras albidum), farkleberry (Vaccineum arboreum), and sweetgum (Liquidambar styraciflua).  In the absence of fire American beautyberry (Callicarpa americana) and yaupon (Ilex vomitoria) may become invasive.

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An ancient Post Oak has survived decades of regular fires in this Longleaf Pine Savannah.

The real show, however occurs on the savannah floor, where hundreds of species of grasses and forbs complete these spectacular ecosystems.  Little bluestem (Schizachyrium scoparium) is an important component in East Texas, and often occurs in the company of other grasses such as Eastern gamagrass (Tripsacum dactyloides), Pineywoods dropssed (Sprobolus junceus), and wiregrass (Aristida palustris).  Brackenfern (Pteridium aquilinum) often carpets the ground and xeric (drought loving) species like Louisiana yucca (Yucca louisianensis) and Eastern prickly pear (Opuntia humifusa) take advantage of the droughty conditions created by pockets of deeper sand.  Forbs typical of this community include goat’s rue (Tephrosia virginiana and Tephrosia onobrynchoides), Carolina false vervain (Verbena carnea), Pickering’s dawnflower (Stylisma pickeringii), Carolina Larkspur (Delphinium caroliniana), Sanguine’s purple coneflower (Echinacea sanguinea), soft green eyes (Berlandiera pumila), racemed milkwort (Polygala polygama), propeller flower (Alophia drummondii), butterfly weed (Asclepias tuberosa), clasping milkweed (Asclepias amplexicaulis), pineland milkweed (Asclepias obovata), birdfoot violet (Viola pedata), and false dragonhead (Physostegia digitalis).  A number of species that are rare and declining in East Texas occur here as well, including leadplant (Amorpha canescens) and incised groovebar.  The range-restricted scarlet catchfly (Silene subciliata) is endemic to the Pineywoods of eastern Texas and western Louisiana.

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Scarlet Catchfly blooming in a Longleaf Pine Savannah

These savannahs also harbor a unique, and declining fauna.  In fact, some species are so closely tied to this community that they are unable to adapt in its absence.  Red-cockaded Woodpecker (Picoides borealis) and Louisiana Pine Snake are in such peril that they have been afforded protection under the Endangered Species Act.  Eastern Wild Turkey (Meleagris gallopavo) and Northern Bobwhite (Colinus virginiana) favor the dense, rich herbaceous layer beneath the longleafs, where bunch grasses provide ideal cover and high species diversity of grasses and forbs results in a bounty of insects.  Both species have become rare in East Texas, however efforts to reintroduce the wild turkey have been met with some success.

Other species such as the Bachman’s Sparrow (Peucaea aestivalis), Brown-headed Nuthatch (Sitta pusilla), Northern Scarlet Snake (Cemophora coccinea), and Southern Coal Skink (Plestiodon anthracinus) are on the decline.  Species such as the Eastern Coachwhip (Masticophis flagellum) and Eastern Fence Lizard (Sceloporus undulatus) remain common, perhaps due to their adaptability.  The Tan Racer (Coluber constrictor etheridgei) is a race of racer that is also confined primarily to this community.  Surprisingly, even amphibians can eek out a living in these sandy environments.  Explosive breeders like the Hurter’s Spadefoot (Scaphiopus hurteri) and Mole Salamander (Ambystoma talpoideum) live the majority of their live deep underground, emerging during significant rains to breed in areas that can hold water long enough for their larvae to develop.

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Northern Scarlet Snake

The downfall of the longleaf pine savannah began with the arrival of European settlers to the region.  Longleaf lumber was of a superior quality.  Rot resistant, and straight as an arrow, it was utilized heavily for the masts of ships.  As it began to rapidly disappear, those tending to the forest’s regeneration noted that due to its unique ecology longleaf took a very long time to grow to a size suitable for harvest.  So instead of replanting them, they opted for species like loblolly (Pinus taeda) and the non-native slash pine (Pinus elliottii), that, though the quality of their wood was inferior, grew much faster and could yield a marketable stand in less time.  At the same time a culture of fire suppression was arising.  The Europeans did not see fire as a useful tool, as did the Native Americans before them, but rather as a threat to their livelihood.  As a result they took steps to eliminate fire from the landscape, and in doing so woody shrubs eventually filled in the open grass-dominated savannahs.

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Sun sets in a Longleaf Pine Savannah

 

The following are a variety of photos of the longleaf pine savannah and its flora and fauna.

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Longleaf Pine Savannah

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Longleaf Pine seedling

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Louisiana Yucca blooms in a Longleaf Pine Savannah.

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Longleaf Pine Savannah

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Slender Glass Lizard (Ophisaurus attenuatus)

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Birdfoot Violet

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Ox Beetle (Strategus antaeus)

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Eastern Lubber Grasshopper (Romalea microptera)

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Six-lined Racerunner (Aspidoscelis sexlineata)

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Southern Coal Skink

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Hurter’s Spadefoot Toad

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Soft Green Eyes

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Eastern Coachwhip

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Zebra Swallowtail (Protographium marcellus)

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Clasping Milkweed

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Wrinkled Festive Tiger Beetle (Cicindela scutellaris rugata)

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Racemed Milkwort

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Sanguine’s Purple Coneflower

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Carolina Larkspur

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Eastern Gammagrass

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Leadplant

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Prairie Kingsnake (Lampropeltis calligaster)

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False Dragonhead

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Texas Red-headed Centipede (Scolopendra heros)

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Texas Dutchman’s Pipe (Aristolochia reticulata)

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Pipevine Swallowtail (Battus philenor)

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Butterfly Weed and Bracken Fern

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Pineland Milkweed

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Carolina False Vervain

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Texas Brown Tarantula (Aphonopelma hentzi)

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Slowinski’s Corn Snake (Pantherophis slowinski)

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Eastern Fence Lizard

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Netleaf Leather Flower (Clematis reticulata)

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Propeller Flower

 

 

 

 

 

Another Day, Another Sandhill

Target Species: Centerville Brazos Mint (Brazoria truncata var. pulcherrima)

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Centerville Brazos Mint blooms among other rare plants in a high quality xeric sandhill

My pursuit of the Centerville Brazos Mint (Brazoria truncata var. pulcherrima brought me back to the xeric sandhills, the interesting community where I recently photographed the Smooth Jewelflower.  This time, instead of heading southeast to the Big Thicket, I traveled northeast to the transition zone between the Pineywoods and the Post Oak Savannah.  Here I found a community described by Texas Parks and Wildlife as “East-Central Texas Plains Xeric Sandyland.”

The Centerville Brazos Mint is rare.  The entirety of its range is confined to Texas, and it requires very specific conditions – deep sands with an open overstory.  These communities have declined dramatically since the colonization of Texas, and today very few high quality examples remain.  Fortunately I was able to visit some that likely appear as they did before Texas was settled.  Though they may be rare, where they occur, the Centerville Brazos Mint often thrives, forming carpets of pink over the sand.

Brazoria truncata var. pulcherrima is a member of the mint family (Lamiaceae) that is restricted to a handful of counties in East-Central Texas.  The genus Brazoria is named for the Brazos River, where it was first collected.  There are three species, all of which are endemic to Texas.

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Centerville Brazos Mint

Where the Centerville Brazos Mint grows, other good things are sure to be found.  A suite of rare species occur in these sandhills.  Studies of these communities have found that they contain one of the highest levels of endemism in the Western Gulf Coastal Plain.  The day I visited I found another rare Texas endemic mint blooming in profusion – the Texas Sandmint (Rhododon ciliatus).

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Texas Sandmint

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Texas Sandmint

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Texas Sandmint

I arrived early, and spent most of the day exploring the sandhills.  At around 4:30 pm I began to see flashes of deep pink.  I recognized them as the blooms of the Prairie Fameflower (Phemeranthus rugospermus).  Another rare species, it occurs in the Central U.S. from Minnesota to East-Central Texas.  It has succulent leaves, an adaptation for the drought-like conditions that occur in the deep sands that it prefers.

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Prairie Fameflower

The Prairie Fameflower is so rare that it was once considered for listing under the Endangered Species Act.  It remains endangered on many state lists.  Most of the flowers I saw were a brilliant deep pink.

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Prairie Fameflower

There were a few, however, that were a light, faded pink.  The flowers of Phemeranthus rugospermus open in the late afternoon, and only for a single day.

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Prairie Fameflower

Portions of the sandhill were carpeted by the low, creeping forbs Yellow Stonecrop (Sedum nuttallianum) and Drummond’s Nailwort (Paronychia drummondii).  In some areas the two were growing together.

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Yellow Stonecrop

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Drummond’s Nailwort

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Yellow Stonecrop

I also saw several Smooth Jewelflowers (Streptanthus hyacinthoides) in bloom.

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Smooth Jewelflower

Prickly Pears were abundant in the deep sands.  The individuals here key to Opuntia cespitosa per the new treatment of the Opuntia humifusa complex by Majure, et al.

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Prickly Pear

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Prickly Pear

These sandhills occur in isolated pockets within a broader band of Post Oak Savannah uplands.  These savannahs were beautiful and diverse in their own right.  Though I didn’t have time to explore them properly during this visit, it gives me something to look forward to on my next visit.

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Butterfly Weed (Asclepias tuberosa) blooms in a Post Oak Savannah

 

Jewel of the Sandhills

Target Species: Smooth Jewelflower (Streptanthus hyacinthoides)

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Smooth Jewelflower

I have long admired the bizarre blooms of the Smooth Jewelflower, but had not previously sought it out.  Though it may be locally abundant, Streptanthus hyacinthoides is uncommon to rare in Texas.  A species of deep sands, it is most frequently encountered in the northern reaches of the Post Oak Savannah.  Globally it occurs from extreme southern Kansas and central Oklahoma through northeast Texas into northwestern Louisiana.  There are also a couple of disjunct populations in the Pineywoods: in the Big Thicket in Hardin and Newton Counties.

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Smooth Jewelflower

It was here that I sought them out.  In the Pineywoods they occur in xeric sandhills.  In the literature, these unique communities are variably referred to as xeric sandhills, oak-farkleberry sandylands, xeric sandylands, sandhill pine forests, etc.  Here soil conditions inhibit the growth of many species.  The deep, coarse sands here ensure that even in times of high rainfall, the water percolates down through the soil very rapidly.  As a result, xeric sandhills exist with perpetual drought-like conditions, and only drought-adapted species persist.

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Smooth Jewelflower

I was able to locate this population thanks to the help of my botanist friend Eric Keith, and Wendy Ledbetter, the Forest Program Manager of the Nature Conservancy in Texas.  Like so many more of our imperiled species, these rare jewels are protected by the Nature Conservancy.  I found them growing in a series of sandy clearings in a xeric sandhill dominated by Longleaf Pine (Pinus palustris) and Bluejack Oak (Quercus incana).

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Smooth Jewelflower

I found the strange flowers somewhat difficult to capture.  I found them strikingly beautiful in their uniqueness.  Beyond habitat preference, I could find little on the life history of this species while researching my 2017 list.  It seems that there is still much to learn about this peculiar jewel of the sandhills.

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Smooth Jewelflower

Xeric sandhills are also home to a variety of other unique and beautiful flowering plants.  Cacti and yucca, typically considered genera of the southwestern states, thrive here.  Traditionally the cactus species of this region was considered to be Opuntia humifusa, however recent work by Majure, et. al. is challenging that (More on that in a later blog post).  Using their new dichotomous key I keyed this species to Opuntia mesacantha.

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Opuntia cf. humifusa

The beautiful Carolina Larkspur (Delphinium carolinianum) was also blooming in profusion.  I photographed the individual below from different angles, to see how the angle of light changed affected their color.

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Carolina Larkspur

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Carolina Larkspur

We also found the bizarre Large Clammyweed (Polanisia erosa) nearby.  I have heard the blooms described as miniature moose heads.  Large Clammyweed, like many species of xeric sandhills, is endemic to the West Gulf Coastal Plain.

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Large Clammyweed

Butterfly Weed (Asclepias tuberosa) was also blooming in profusion.  This striking milkweed is common in sandy habitats throughout much of the United States.

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Butterfly Weed

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Butterfly Weed

Farkleberry (Vaccinium arboreum) is a conspicuous mid and understory component in xeric sandhills.  This blueberries produce edible fruits.  Though they are much smaller and less flavorful than what you might find in your grocery store, they still make for a refreshing treat while wandering across the parched sand.

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Farkleberry

Growing tangled among some of the numerous Farkleberries we found the twining stems of the Netleaf Leather Flower (Clematis reticulatus).

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Netleaf Leather Flower

Xeric sandhills are certainly one of my favorite places to explore.  This post barely scratched the surface of the diverse flora that occurs here, and I didn’t even mention the many rare and interesting animal species that can be found in these deep sands, and I hope to revisit these special places in future blog posts.

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Cacti bloom in a xeric sandhill