Do You See What I See?

My good friend and horticultural demigod, John Stella, inspired the title of this article. Several months ago we were talking about characteristics of plants and how a trained eye can see them so clearly. Just as a doctor can look at an X-ray, a mechanic can listen to engine or a chef can taste the individual ingredients of a dish, so too can a plant person look into the depths of a landscape and pull apart all of it’s inner beauty with ease. Asked years ago to list all of my favorite plants, I believe I gave up somewhere around 400 or 500. There are simply too many plants that do too many wonderful things to have a list any smaller. While most are happy just being enamored with the leaves and flowers of plants, there are those of us who appreciate the bark and twigs as well. Many trees and shrubs devoid of their foliage offer outstanding characteristics, in the dead of winter, and in many cases builds the argument for their main appeal in the first place.

Coral Bark Maple, Acer palmatum ‘Sango Kaku’ has to be the grand champion for winter interest. An upright, deciduous tree that many, when they first learn it, deem to be the most shocking because of its electric red bark in the coldest months of the year. Here’s another though, Pacific Fire Vine Maple, Acer circinatum ‘Pacific Fire’ also has similar markings. This one, however, has more of an orange-red hue on its bark with a waxy sheen that leaps out at you in the winter. Paperbark Maple, Acer griseum has classic cinnamon or red-brown exfoliating bark. “Snow acts as a perfect foil for the bark and accentuates its qualities” Michael Dirr. Persian Parrotia, Parrotia persica, a tree native to Iran has exfoliating gray, green, white and brown patches on older specimens and is a personal favorite. Quaking Aspen, Populus tremuloides is the most widely distributed tree of North America! Younger trees express smooth, greenish-white to cream colored bark and landscape designers like the strong vertical white lines they offer as they come through mass plantings beneath them. Japanese Zelkova, Zelkova serrata is heavily lenticelled and usually depicted with a strong central trunk supporting a huge vase-like head. The bark, on older specimens, has gray-brown markings, often exfoliating, reminiscent of Chinese Elm, Ulmus parvifolia.

Perhaps my favorite, smaller deciduous shrub, for winter interest, is Japanese Kerria, Kerria japonica. Distinct yellowish green, and in many cases, bright neon- green stems in the winter are a beacon for many. Kerria, incidentally, looks infinitely better when mass planted. Common Winterberry, Ilex verticillata has bright red, sticky fruit, often in pairs, looking as though they are holding on for dear life through February. Tatarian Dogwood, Cornus alba is a deciduous dogwood shrub of medium stature, reaching heights of 6-10 feet. And while there are many with interesting foliage, the winter months punctuate the bark, often showing crimson reds or bright yellows. And who could forget Highbush Blueberries, Vaccinium corymbosum; whose stem color in the winter is yellowish-green to red. Another superb deciduous plant for mass plantings!

Finally to the conifers! Albeit, the following plants are not deprived of their foliage in the winter, on the contrary, they maintain their winter coats and also have distinguishable marking that amplify their external jackets. A Lodgepole Pine drawing considerable attention is Pinus contorta ‘Chief Joseph’. A deep, rich, golden-yellow pine pulls itself away from the drab colors of winter and beckons to be touched to see if it’s real. Found in the Wallowa Mountains of northeastern Oregon by Doug Will, this tree transforms itself from green in the warmer months to extreme yellow in the colder months. A Canadian hemlock to note is Tsuga Canadensis ‘Albospica’. Cultivated since 1866, this hemlock has snowy-white tips that contrast dramatically against its interior dark-green needles. A dusting of fresh snow held over this shade garden plant will make you a believer that there is a God. Finally, a Himalayan Pine with incredible winter interest is Pinus wallichiana ‘Zebrina’. A variegated selection that has long, thin needles and bands of yellow held in and around powder blues. Formerly listed as Pinus griffithi, Himalayan pines are native to the high mountains of Afghanistan to Nepal.

Many plants devoid of their foliage offer outstanding attributes. My hope is that this article has you looking at landscapes this winter in a new light. While flowers, leaves and needles are nice to look at; it’s not the whole picture. Great gardens inspire us throughout the seasons and winter is where it all begins.

“Resinous Exudations”

Longing to write about this tree for some time, I find it timely to discuss the possibilities of a unique dwarf conifer. Now that the holidays are behind us what could be planted into our outdoor containers other than using the proverbial dwarf Alberta spruce (Picea glauca ‘Conica’)? As a garden center owner I am always astounded as to the number of DAS (dwarf Alberta spruce) we sell as an industry. Known to be problematic, a condominium for spider mites, water hogs and eager for full sun, most seem to be planted in containers far too small for their root systems and forced into cramped, unlit surroundings. Allow me to introduce a substitute… Bristlecone Pine (Pinus aristata).

Years ago, studying at Rutgers University, I had a plant identification class where I learned this tree for the first time. Pinus aristata is a five-needle type conifer (leaves borne 5 together) with an extremely slow growing habit. Bluish-green needles adorn a most picturesque character both in its adolescence and more mature years. The bark of a Bristlecone morphs from a smooth grey-green when it’s young to a more fissured, rust color as it matures. The needles are aromatic, but it’s the white dots commonly found along the needles that have always intrigued me. Resinous exudations (secreting a viscous marking through its pores) are markings that look like tiny sugar crystals sitting along the needles that many confuse as insect or fungal issues. These, in fact, are natural occurrences that quickly help to identify what type of tree you are looking at. Tolerant to dry soils, they make a great container plant for those who are remiss in their watering habits. While Bristlecone can obtain heights of 20-40 feet and are documented as one of the oldest living plants on earth, this dwarf conifer could survive in a planter almost indefinitely. Three to five foot plants can take the better part of 20 years to achieve. Native to the Southwestern United States, Pinus aristata has often been referred to as a Foxtail pine because of the bushy effect of its foliage.

As with any great plant this also has a few cultivars to be on the lookout for. ‘Sherwood Compacta’ is a plant I have, as a pair, welcoming guests as they approach our walkway. Even slower growing than the species, ‘Sherwood Compacta’ is a handsome, perfect little pyramid. Complete with small purple cones in the spring, it has “tightly packed tufts of medium-long, green needles with white undersides” (Iseli Nursery). Found and named by the late Oregon nurseryman Andy Sherwood, ‘Sherwood Compacta’ is a cultivar that can survive years in a contained area. ‘Formal Form’ is another Great Basin Bristlecone Pine that has a more narrow, uniform shape, which is larger than ‘Sherwood Compacta’ and smaller than ‘Blue Heron’. The needles are 1.5 inches long and radiate, as do the others, around the ascending branches. All are long-lived plants.

Speaking of longevity, as previously mentioned, Bristlecone’s are among the oldest living plants in the world. One such plant, “Methuselah”, is aptly named after Methuselah, the longest-lived person in the Bible. The tree is located in the “Ancient Bristlecone Pine Forest in the White Mountains of eastern California, however, it’s precise location is undisclosed by the U.S. Forest Service to protect the tree from vandalism” ( Methuselah Walk. U.S. Forest Service/ Eastern Sierra Interpretive Association). Core samples were taken in 1957 and estimated the tree to be 4,789 years old then. It is the oldest known individual tree in the world and non-clonal organism still alive. Its estimated germination is 2832 BC! Considering that Bristlecone’s may only obtain an inch or so in diameter in the course of a century, you can appreciate the perseverance of such a tree. To clarify any confusion, the fore mentioned tree is categorized as Pinus longaeva. Pinus aristata, longaeva and balfouriana are all closely related species of Bristlecone pine. Cold temperatures, dry soils, high winds and shorter growing seasons all contribute to the stagnation of a Bristlecone’s development. As a result, the wood is quite dense and resinous creating a natural barrier for insects and fungi to penetrate.

Suitable for rock gardens, bonsai work, an entrance piece to a garden or an outstanding container plant, Pinus aristata can have many uses. Tolerant to dry soils, less likely to be invaded by spider mites and a slow grower are all reasons to consider this over the more pedestrian dwarf Alberta spruce. Not to mention the neat white spots you can stump your friends with when they think an insect is invading your tree. You know better!