20 March 2012

Spring Already??

Lindsay and I have been so consumed lately that even with reports from across the state of blooming spring wildflowers, we hadn't had time to just get into the woods across the street to see what others have been raving about.  In fact, without the blogs and list-servs to which I subscribe, I might have lost my mind... at least I was able to live vicariously through the field outings of others for the past couple of weeks.  With a string of 80 degree days over the past week, however, Lindsay and I could not help but to put everything else aside and fall farther behind with our other responsibilities to ensure that we had a chance to get to Potato Creek State Park in St. Joseph County, Indiana on 18 March 2012.

It isn't unheard of to see a few forest species flowering in mid-March.  For example, Skunk Cabbage (Symplocarpus foetidus, above) is usually the first native species to flower in the pre-spring, often sending up its flowering spathe and spadix structure in wet mucky forested areas while there is still snow on the ground, sometimes even as early as mid-February.  Although Skunk Cabbage was still flowering, some plants had already put up their leaves, a sign that the flowering structures will soon shrivel, leaving a dark brown fist-sized fruiting structure into the summer.

As its common name suggests, Harbinger-of-Spring (Erigenia bulbosa, above) is often one of the first native wildflowers to begin blooming in mesic forests, but mid- to late-March is usually the earliest that you begin to see the tiny carrot-family flowers of these plants peppering the forest floor.

Another early bloomer, Spring Beauty (Claytonia virginica, above) often starts flowering at about the same time as the preceding species.  This is one of our commonest forest wildflowers.  In addition, it can withstand more disturbance than many of its forest associates, and it sometimes can be found in mowed lawns that once supported trees and a rich understory but that sadly have been reduced to a near monoculture of non-native grass.

Limestone Bittercress (Cardamine douglassii, above) is another of the ephemerals that begins flowering in mid- to late-March during normal years.  This mustard is very similar to and often confused with Bulbous Bittercress (Cardamine bulbosa), which often grows in areas that are more damp.  The flowers of Limestone Bittercress are often tinged with lavender, but they can be white like those of Bulbous Bittercress.  One way to tell the two species apart is to look at the upper stems and determine if they are hairy or not... Limestone Bittercress has pubescent upper stems, whereas the upper stems of Bulbous Bittercress are hairless.

One of our most overlooked and underappreciated early-blooming plants is the native shrub American Hazelnut (Corylus americana, above), which can often be found flowering in early March.  As seen above, this shrub has female and male flowers in separate inflorescenses on the same plant.  In the foreground, you can see the fuschia-colored stigmas of female flowers, while the male flowers in drooping catkins can be seen in the background.

A shrub that is much more conspicuous when in flower in spring in mesic to damp forests is Spicebush (Lindera benzoin), shown above.  The yellow clusters of tiny flowers on this species are usually not evident in northern Indiana until early April.  Later in the season, these flowers are replaced by bright red berries.

Yet another species that can usually be found flowering in moist woods beginning in mid-March is Sharplobe Hepatica (Hepatica nobilis var. acuta), pictured above.  The leaves of this species are dark purple and persistent through the winter.

Mid-march in mesic forests also brings forth the blossoms of Cut-leaved Toothwort (Cardamine concatenata, above).  Typical of mustards, the flowers of this species have four petals in a cross-like arrangement.  Like many of the other spring wildflowers featured in this post, the flowers of this species arrive early to take advantage of the sunlight that can reach the forest floor prior to the overstory trees producing leaves.

Two species similar in appearance that are often mistaken for one another are shown above and below.  Above is Rue Anemone (Thalictrum thalictroides), a solitary plant of slightly drier woods and slopes that usually begins flowering towards the end of March.  Below is False Rue Anemone (Enemion biternatum), a colony-forming wildflower that usually begins flowering in moist woods in late March.

The stunning Bloodroot (Sanguinaria canadensis, below) usually starts flowering in late March at the earliest, but we saw several nice colonies of this plant on 18 March this year.  Like many other spring wildflowers, the seeds of Bloodroot bear sugary, fleshy appendages known as elaiasomes; as a result, the seeds are dispersed by ants that are attracted to the elaiasomes.

Lindsay and I were pretty shocked to find some Dutchman's Breeches (Dicentra cucullaria, below) in bloom, since it normally doesn't begin flowering until the very end of March.  Lindsay really liked the photo below, as it shows a tiny ant on the uppermost flower.  Dutchman's Breeches is similar to another moist forest species, Squirrel Corn (Dicentra canadensis), which begins flowering just a tad later.

One of the most striking spring wildflowers has to be Marsh Marigold (Caltha palustris), shown below.  The bright yellow blossoms of this buttercup family species can start to show as early as mid-March in normal years.  You can find this one in wetter, mucky areas and along streams, nearly always associating with Skunk Cabbage.

In addition to these native species, we also saw a couple of sedges (Carex communis and Carex pensylanica) in flower, as well as some willows (likely Salix discolor).  To not discriminate against some of the showy non-native species that are in flower right now, below are three that we noted along the woodland trails.

Common Periwinkle (Vinca minor), pictured above, is often regarded as a highly aggressive species.  I won't go so far as to say that it isn't, but I don't know that I've ever seen this species away from a home site, or away from a planted colony for that matter.  It certainly spreads by rhizomes from its originally planted location, and I wouldn't recommend planting it, but I personally don't put it in the same class as invasives like Garlic Mustard (Alliaria petiolata) or Multiflora Rose (Rosa multiflora).

Similarly, Daffodils (Narcissus pseudonarcissus) will persist for many years after planting, even in at least partly shaded conditions.  I definitely don't consider them invasive, though, as they don't seem to spread and definitely don't outcompete native species, at least in this part of the world.

It is difficult not to have a special place in your heart for the crocus (Crocus spp.), as their opening flowers simply seem to exude spring. 

As you can see, although several plants are flowering prematurely this year, many are within their known flowering periods, albeit at the very beginning of those known flowering periods.  With this extended warm... no... hot stretch, it will be interesting to see how the spring progresses.  I expect that we will still have another snowstorm before we get consistently warm spring weather, but this stretch has sure been pleasant.  If you haven't already, I hope you get a chance to get out there soon to experience the spring flora.


Ron Gamble said...

Very nice! Thanks for the informative info comments too.

Ron Gamble

Scott Namestnik said...

Thanks Ron. Hope to see you soon!