鈥淚n the woods where the snow is thick, bars of sunlight lay like pale fire.鈥� 

鈥� Katherine Mansfield, The Journal of Katherine Mansfield (1927)

The magnolia, redbud, katsura, birch, maple, and ginkgo have all disrobed鈥攕hedding their beautiful fall canopies as they settle into the quiet season. On bright days, they cast long shadows across the ground as the sun sits low in the sky. At sunset, their elegant silhouettes are often backlit by fiery skies. And when the snow arrives, it cloaks their outstretched limbs in a layer of white that gleams on even the darkest nights.

Unlike during summer, when there are so many things to distract me in the garden鈥攄ragonflies, bluejays, coneflowers, bumblebees, and weeds鈥攚inter is a time to redirect my observations and reflect on nature, especially trees. And, when the snow settles, even better.

鈥淚f you would know strength and patience, welcome the company of trees.鈥� 

鈥� Hal Borland, nature writer

There are the champions, the oaks鈥攔ed, white, swamp, shingle, pin, and bur鈥攁nd when I come across an old one growing in an oak grove or alongside a 19th century farmhouse, I marvel at the wingspan of its big, burly branches. Those limbs have hosted countless birds, squirrels, insects, and more over the decades. A few holes in the trunk have served as nesting sites for generations of woodpeckers, chickadees, and other birds.

Oaks are long-lived native trees with stately stature. The Garden's collection contains more than 60 oak varieties (20 species are native to Illinois) and more than 1,000 individual oaks. One feature that stands out in winter is an oak tree鈥檚 corky bark, which serves to insulate the tree from freezing temperatures and fire.

鈥淚n every walk with nature, one receives far more than he seeks.鈥� 

鈥� John Muir, American naturalist

Then there鈥檚 another group鈥攖he conifers鈥攃one-bearing plants, with their green, blue, silver, or gold-green needles. Drooping, weeping, upright, dwarf, narrow, or pyramidal鈥攖heir shapes, textures, colors, and forms add splendor to the winter landscape. But they offer something more: protection from inclement weather for birds and a hideaway for when they seek to evade predators. A stroll through the Dwarf Conifer Garden is an enchanting experience in winter. Small, sturdy, and colorful, many of the plants there offer a hint of fragrance on a cold, sunny day.

鈥淪tudy nature, love nature, stay close to nature. It will never fail you.鈥�

鈥� Frank Lloyd Wright, American architect 

Trees are often easier to identify in summer than winter. After all, you can see the shape and color of their leaves and how they are arranged. It鈥檚 a bit more challenging in winter, but just as interesting. Some clues include the bark. Shagbark hickory has long peeling strips of bark. American hornbeam, also called muscle wood, displays bark that is incredibly smooth with a few ripples. And there鈥檚 the arrangement of twigs鈥攅ither opposite, like that of the maples, or alternate.

鈥淗e who marvels at the beauty of the world in summer will find equal cause for wonder and admiration in winter.

鈥� John Burroughs, American naturalist

Berries hang on crabapples. Yellow, spidery blossoms adorn witch hazels. The sleek buds remain on beech trees. You need not be an arborist to appreciate all the little details that trees unveil during the winter. Are there dangling fruits? What do the buds look like? Is the tree holding onto its leaves? Is the bark smooth, bumpy, corky, or peeling? A field guide to trees in winter is a lovely companion, but the Garden鈥檚 plant tags offer help if you visit without one.

There are many ways to appreciate winter outdoors. Take a walk to the Elizabeth Hubert Malott Japanese Garden, where the pines are symbols of long life that create living sculpture. Or visit the 100-acre McDonald Woods, filled with oaks and a forest floor laden with acorns. The Garden in Winter is a very special place indeed.

Nina Koziol is a garden writer and horticulturist who lives and gardens in Palos Park, Illinois