Showing posts with label Liatris aspera. Show all posts
Showing posts with label Liatris aspera. Show all posts

Thursday, September 15, 2011

Adams County's Prairies Revisited

I'm quite excited to move on with my series on Ohio's native prairies!  For part two I will focus on the tall grass prairies of north and west central Ohio known as the Sundusky and Darby Plains.  These once immense prairie systems were some of Ohio's most diverse and ecologically important habitats prior to European settlement until they were almost entirely erased forever.  However I can't help but first share a few examples of the amazing flora seen during my most recent time spent down in Adams county!  Just consider this a happy extension and continuation of previous post on the bluegrass prairies of Ohio.

Big Bluestem looking over the rolling hills and valleys of southern Ohio

There is nothing better than spending a few days in the rolling foothills of the Appalachian's in southern Ohio.  With the forecast predicting clear blue skies and sunny warm weather ahead, my father and I made the two hour drive down to our property in Adams county.  We'd been meaning to give the cabin and surrounding deck a fresh coat of paint for a while and decided to take advantage of nature's temporary compromise.  As promised, the sun shined brightly through the yellowing canopy of leaves that rippled in the refreshing breeze.  Painting has never been known to put a smile on my face but I couldn't complain spending all day outside in the fresh forest air with nothing but the sounds of late summer tickling my eardrums.  Despite the days filled with a cramped hand and paintbrush, I was able to slip out in the early morning or evening hours for some botanizing!  Lucky I did as I was in for a treat with an array of tantalizingly rare and gorgeous wildflowers!

Rough Rattlesnake-root - Prenanthes aspera

When it comes down to it I really am a fan of just about any plant species and/or family.  It's easy to play favorites, as I frequently do, when so many share the characteristics and qualities I look for in a plant.  Having said that, I can say without any doubt come fall one of the best genera to go looking for are the Rattlesnake-roots (Prenanthes spp.).  Rough Rattlesnake-root (P. aspera) is one of the rarest and is listed as an endangered species in Ohio.  The open and rocky situations in the county's more acidic barrens are home to the few state populations still extant.  Some point in the near or far future I'd love to do a post dedicated solely to our state's seven Prenanthes species.

Yellowish Gentian - Gentiana alba

Ah, Gentian season is here!  Nothing says fall like the white and blue colored, tubular blooms from the Gentians.  The first up to bat is the Yellowish Gentian (Gentiana alba), which also goes by the common names of Cream or Prairie Gentian.  Listed as threatened in Ohio, I've never seen it anywhere else than a couple separate populations along Adams county's most secluded forested roads.  Their ghostly cream flowers glowed through the morning mists as I walked up to the first patch just starting to open at the top of the corolla.  I did a more detailed post on these wonderful plants last fall that can be found HERE.

Blue Curls - Trichostema dichotomum

After a few seasons of eluding me I finally found the dainty and cute Blue Curls (Trichostema dichotomum) blooming in one of the areas numerous prairie openings!  I'd waited a long time to capture these sophisticated little flowers with my camera lens and jumped at the chance to final mark these off the list.  There's no mistaking Blue Curls with their dark blue spotted lip and curving stamens and styles.  Each flower is only the size of a pinkie nail so the macro lens was a must!  Ohio is home to the state endangered Narrow-leaved Blue Curls (T. setaceum) which only differ in very narrow, linear leaves and slightly larger flowers.

Elephant's-foot - Elephantopus carolinianus

Easily one of my favorite wildflowers come fall in the southern Ohio counties is the easily ignored Elephant's-foot (Elephantopus carolinianus).  An inconspicuous member of the Asteraceae family, it's small white flowers actually only have four petals, each comprised of five rays; all making the flower seem to have numerous individual petals.  Elephant's-foot typically grows in openings and borders of rich, mesic woods with a rosette of large, basal leaves.

Rough Blazing Star - Liatris aspera

Generally the last of the Liatris' to bloom and my personal favorite is the Rough Blazing Star (L. aspera).  Sometimes reaching four to five feet tall and covered with over 100 flower heads, it just doesn't get much more breath-taking than seeing a prairie filled with these tall, thick wands of pink!  This particular specimen was over four feet tall and branched towards the top.  I love these plants!

Smooth Yellow False Foxglove - Aureolaria flava

A drive down almost any back road during September on the upper slopes and ridge tops of southern Ohio's oak/hickory forests should reward the careful observer with one of the late summer's most delightful wildflowers.  These large, bright yellow and trumpet-like flowers belong to the Smooth Yellow False Foxglove (Aureolaria flava).  These plants are known to be semi-parasitic on the roots of oak trees, tapping into the much larger plant's resources for its own use.

Slender False Foxglove - Agalinis tenuifolia

A common sight in prairies, woodland borders, thickets and openings is the Slender False Foxglove (Agalins tenuifolia).  Found throughout nearly the entire state, it seems to be most frequent down in the southern reaches, as I've seen it with increasing frequency the more south I travel.  The deep pink corollas have a light, polka-dotted throat lined with fuzzy, cotton-like stamens/anthers.

Stiff Goldenrod - Oligoneuron rigidum

Even the greenest of any plant appreciator is familiar with the fall blooming Goldenrods (previously all Solidago's).  Fields, meadows, roadsides and prairies are painted bright shades of gold and yellow from the numerous different species; some as common as weeds, others much more rare.  An uncommon goldenrod and arguably my favorite is the Stiff Goldenrod (Oligoneuron rigidum).  It's unbranched stems contain alternately-attaching, entire leaves that are thick and clasp the stem.  This with the aid of large, less numerous flower heads add up to a pretty easy I.D.  All the goldenrods were once under the Solidago banner but many, such as this guy, have been separated out into new genera.

Tune back in soon to catch the continuation on Ohio's native prairies but I think one more post dedicated to a very rare and very beautiful wildflower is due before getting back on track....

Tuesday, October 12, 2010

Liatris, the "Star" of the Prairies

As spring starts to fade and gets swallowed by the hot, steamy months of summer, wildflowers begin their move from woodland sanctuaries to the open, sunny fields and prairies.  While a number of species continue to thrive and bloom on the forest floor and woodland borders/openings throughout the year, many more need larger amounts of sunlight the closed forest canopy cannot provide.

Lynx Prairie in Adams County

Hailing from the largest family of vascular plants, Asteraceae or Compositae, the genus of Liatris has to rank near the top of my favorite summer wildflowers.  Seven species are indigenous to Ohio's soils and all are beautiful and unique in their own ways.  The many small prairie openings in Adams County, OH are home to five species of Liatris and provided me many opportunities to see these plants in their natural habitat.  Some species are grown in nurseries and wildflower gardens so a few of you may recognize these plants from those experiences.  Let's take an inside look at some of the charming members of this intricate genus.

Liatris squarrosa
Liatris squarrosa



Scaly Blazing Star (Liatris squarrosa) is one of two species of Liatris that are state listed with this particular one falling under the potentially threatened status.  While only found in a handful of Ohio counties, this species shows no geographical distribution preference, being found in all quarters of the state except the far southeast.  Blooming and fruiting from July - October, this plant is found growing in xeric prairies, rocky open woodlands and barren Oak savannas; all having poor soil conditions in common.  The inflorescence (whole flower cluster) of this species lies at the top of the stem as well as singly in the leaf axils and is made up of 15-60 disk flowers (single, pink flower).  The single disk flowers remind me of a tiny, pink snake 'tasting' the air with its tongue-like stamens.  One of the best means of keying these plants down to the species level is taking a close look at the involucre (the rosette of bracts the inflorescence emerges from; essentially the area between the inflorescence and where it attaches to the stem).  The shape, color and glabrous (smooth) or pubescent (hairy) nature of the bract helps tremendously.  With L. squarrosa the bracts have a telltale appearance of coming to a sharp point, scaled structure (hence the common name) and being covered in hairs.  While the pubescence can vary greatly in this species, all the plants I came across showed a heavy amount.

Liatris squarrosa white variation

The above picture is of a lone white flowered variation of L. squarrosa.  In the multiple prairie openings, out of the hundreds and hundreds of plants in bloom this was the only white one I saw.  How rare and unique it is I'd love to know.

The other state listed species is the threatened Cylindrical Blazing Star (Liatris cylindracea) which I was fortunate to come across but did not have my camera equipment with me.  It can be found blooming around the same time and in the same habitat as L. squarrosa and has a similar plant/flower structureThe best means of I.D.'ing this species in the field is once again looking at the involucre.  The smooth cylindrical surface constructed from the green bracts along with the long and narrow nature of the involucre make for positive identification.

Liatris aspera
Liatris aspera



Next up is my favorite of the group, Rough Blazing Star (Liatris aspera).  Much more common in the state than the previous species, this guy is still mostly restricted to the southern third of Ohio and some populations up along Lake Erie in the sand dune areas.  Why it is largely absent from the northern two thirds of Ohio is unknown despite suitable habitat being available.  This beauty blooms later in the season (August-September) in the same habitat and environments as just about all Liatris'.  With such robust and full blooms as shown in the photograph on the left, this plant will commonly droop over from the weight.  Similar to the species above the involucres are key to identifying this species along with the much shorter and less emergent disk flowers.  Taking a look at the bracts (seen in the photograph on the right), they are circular in fashion and around the edges, especially at the apex, are a pinkish/white color.

Liatris spicata
Liatris spicata with Tiger Swallowtail



The last species I would like to discuss is the Spiked Blazing Star (Liatris spicata).  Our most common and widely distributed Blazing Star it differs from the all the previously mentioned species in a couple different ways.  Instead of growing in xeric conditions this species prefers moist soils of all types of habitats.  I've seen in it prairies, marshes, fens and wet meadows/fields.  Also different is the appearance of the plant itself.  A tall, straight stem is covered with much smaller inflorescence's that contain fewer disk flowers per bundle.  Something interesting within the Liatris genus is the fact that it flowers from the top down (as shown in the photograph on the left.  The top most flowers have wilted while the bottom is still healthily in bloom), while many, many other plants bloom the traditional bottom up.  Blazing Stars are a huge hit with the butterfly crowd as well as the human.  As seen above an Eastern Tiger Swallowtail is making good use of the nectar from L. spicata.  Watching these guys start at the bottom of the stalk and work their way up, taking the time to sample each disk flower with their long proboscis is something I could watch all day.  The insect-plant interactions I witness on an almost daily basis never get old.  Such an amazing world that goes on right under our noses with a very large majority never taking the time to care or notice.