Botany Buddy

Having grown up in Northwest Missouri, where the winter winds of the plains from Iowa, Nebraska and Kansas converge on the bluffs of the Missouri River like three tornadoes of ice converging into one, I learned to appreciate anything in the vegetation that glowed with warmth.  In the surrounding landscape it was the golden tones of the fields laying fallow, especially when they sparkled from the frost glistening in the sun.  In the sky it was the amazing sunsets as far as the eye can see even after a long day of nothing but cold blue skies that seemed as if you were peering into ice.  On the highways it was the oasis that always formed about a half mile ahead of you on the road and what appeared to be steam rising from the asphalt that was the only thing absorbing the sun since there wasn’t a tree in sight.  The warmest memories of all were of course inside, with the smell of what some would call “farm food”.  The pot roast on Sundays, fried chicken on Saturdays, and of course spaghetti on Wednesdays.

However, when you arrived at someone’s home, it was usually one of the coldest sites of all.  In the midst of the pastures would be the perfectly green lawn.  The houses would always be white, to not show the dirt blowing off the fields and gravel roads, and they would be perfectly adorned with a straight row of yews, or junipers tortuously pruned into a shape they were obviously not supposed to be.  Green it would be, even in the evergreens with hedgerows of White Pine, Junipers, or Arborvitae perfectly marking the borders of the lawn.  Someone might occasionally get crazy and throw in a prized Blue Spruce (assured to have lights at Christmas), but when you needed that blue the most, it always seemed to look green if not brown from the burn of the winter winds. 

Quickly in my career as a designer I had to overcome this hurdle.  Being a plantsman first this wasn’t hard.  I grew up in nurseries, so my challenge as a designer wasn’t finding plants to use, it was learning how to restrain my pallet.  One thing I learned early on was that it was hardest to make a landscape look great in winter.  However, if you could accomplish that, making it interesting the rest of the year was a piece of cake.  I am not talking about using all kinds of colorful evergreens that look like they came out of a crayon box.  I love interesting conifers, but not when the color overpowers the essence of the plant.  So in this post I thought I would focus on plants with interesting barks.  Conifers are too easy.  The following plants are some of my favorites, but by no means all that I use.  They are also a mix of native and non-native varieties, but none should be invasive.  What they do have in common is a sense of warmth and life they can invoke in the dead of winter.

Betula (Birch):  Betula nigra (River Birch) is probably the most common.  There are several varieties of the species including ‘heritage’.  All have the indicative papery tan exfoliating bark.  They also are usually multi-trunked with a few large leaders reaching for the warmth of the sun and small horizontal branches wisping out from the sides . The vertical structure of the trunk makes it move in the wind and provides a nice contrast to the broad, heavy and  horizontal branching of  Spruce and Pine.  My favorite Birch is actually Betula populfolia ‘Whitespire” (Japanese Whitespire Birch).  It is a white or “paper” barked variety that has proven to be borer resistant.  The parent plant is now almost seventy-years old and remains borer free.

Cornus sericea (Red Twig Dogwood):  This is one of the few shrubs with colorful bark in the winter.  It is also native to much of the United States.  This plant has a bright red twig in winter that can be seen from a distance but isn’t overpowering.  The vertical branching habit makes it feel more like a grass or thicket plant than a shrub, but the fullness makes it work well for a border or foundation plant.  The plants are a lush green in summer with a nice white flower and prolific white berries birds love.  Along with this you must include Cornus alba (Variegated Red Twig Dogwood).  It is very similar to Conus sericea, except it has a variegated leaf.  This species can be prone to anthracnose but the variety Cornus alba “Ivory Halo” seems to be disease resistant, and keeps a more compact form than other varieties.

Hydrangea quercifolia (Oakleaf Hydrangea), and Hydrangea anomala var. petiolaris (Climbing Hydrangea):  Both of these plants have a birch like bark that is exquisite in winter.  The Oakleaf Hydrangea looks great against evergreens or lawns, and another interesting feature is that if you leave the flowers on they will dry in place all winter.  This almost makes it look like it is in bloom.  Climbing Hydrangea is wonderful on a fence, and especially brick walls.  The bark really pops out against brick.  It also has a very fibrous attaching root that give it an almost Gothic feel compared to other vines.  It is also a self attaching vine with makes it even nicer.

Physocarpus opulifolius (Ninebark):  There are two predominate varieties of this plant ‘Diablo’, a purple leaved variety, and ‘Dart’s Gold’a yellowish leaved variety.  Both have a Birch like texture in winter.  If left alone they grow very vertical and develop a thick trunk like structure.  They seem to max out around six feet in height and four feet in width.  This makes them great to tuck behind low growing evergreens and if left natural will look almost like a very small Birch.  Ninebarks are extremely hardy, fairly fast growing, and drought tolerant.

Acer palmatum ‘Sangu Kaku’ (Coral Bark Maple):  This plant his a vivid pinkish coral bark in winter.  It can almost take on an orangish tone.  The tree itself is very delicate and rarely exceeds twelve feet in height.  It has a ferny maple leaf and wispy texture.  It does not develop the distinguished branching habit that other Japanese Maples do, so it does look good as a stand alone specimen.  However, it is fantastic tucked into evergreens or against a foundation.  The only downfall to this plant is that it is prone to winter kill.  Winter watering will cut down on this, but expect it to develop some dead wood in winter that will need to be removed in the spring.

Lagerstoemia indica (Crepe Myrtle):  There are dozens of varieties of this plant in production.  It comes in all sorts of colors and sizes.  The trunks are usually clumped and have a blotchy exfoliating bark, rather than papery bark like a birch.  Many people think of them as trashy because they drop flowers and seed pods constantly and sucker which makes them require pruning to keep nice trunks.  Regardless, with all of that, it sure looks good most of the time and especially with its late summer bloom and winter bark.  Both features shine at times when other plants are lackluster.  On top of that it can survive the abuse of just about any parking lot in the south.

Acer griseum (Paper Bark Maple):  This is a very underused and overlooked tree.  It averages about 25-30 feet in height, so it can be used for shade on a patio, a specimen in the lawn without killing out the grass, or as an ornamental in a foundation planting.  It is not overly showy.  It doesn’t have an amazing flower or incredible fall color, but it is classy.  The fall color is nice, and the foliage is very clean and green in the summer, but this plant is sought for the bark.  It is a favorite of collectors.  Sometimes I compare plant collectors to book collectors.  If I were to compare it to a book you just had to have on your shelf it would be Catcher in The Rye.  It is not a huge tree, but does she rextremely well written, reliable as a recommendation, full of inspiration and bound to create memories.

Platanus x acerifolia (London Plane Tree) and Platanus occidentalis (American Sycamore):  These are two of the great majestic trees of urban parks everywhere.  They are messy, and drop limbs, leaves, and seeds all of the time, but the mess is worth it.  They are extremely hardy, pollution and drought tolerant, and capable of living in swamps.  There is not much this plant can’t take, but what it gives is irreplaceable.  The bark of the London Planetree exfoliates on the lower portions of the trunk.  The American Sycamore is reversed and exfoliates on the upper trunk and branches.  Both create very tall and open canopies making them ideal for street trees.  As their branches cross the road they create the feeling of a nave.  Given the space of a park, where they can be 100 feet from the next tree, they can form a cathedral unto themselves with branches hanging all the way to the ground 60-80′ wide.  When it comes to habit, they can rival the grandest of any Oak, but what makes them stand our is that glorious white of the bark exploding in winter.

I am sure I have left out plenty of others, like some of the Poplars, Tree Lilac, Ironwood, and countless others.  After all, I need to leave something for later.  I am already craving the cold walks amongst the Sycamores in the valley through the thick fog of winter, and winter isn’t even here yet.  I need to leave something for January when we are really sick of winter and dreaming of spring.  Hopefully these will just give you some motivation and help you think outside of the box of the evergreen hedge.  There are lots of options for winter interest when it comes to evergreens and even grasses, but when it comes to design, working with bark requires a subtlety the invokes class.  Most importantly since barks encase the heart of the tree they also exude the warmth of their essence, something we are all about to need.

Of course, all of the trees and shrubs profiled in this post may be found in Botany Buddy’s Tree and Shrub Finder for the iPhone and iPod Touch.