Monthly Archives: November 2011

Class of 1849 Twins and a Witchhazel

Let’s play connect the dots.  This game will take us from the early days of Haverford College…..New Paltz, NY……botanical gardens and backyards around the world.  Albert and Alfred Smiley Class of 1849 built the now National Historic Landmark, Mohonk Mountain House in 1869.  Built in the Victorian style, just 90 minutes north of New York City, it has remained under the guidance of the Smiley family.  It is one of America’s oldest family-owned resorts.

The eastern witchhazel, Hamamelis virginiana is abundant in the woods of the northeast extending south to Missouri.  A number of years ago a red form of this native fall blooming witchhazel was found growing on the Mohonk Nature Preserve.  What sets this apart from the norm (yellow petals) is that the petals are burgundy/red at the base and diffuse to yellow at the tips and it is lightly scented.  They begin blooming in late October and continue today.  I have planted Hamamelis virginiana and Hamamelis virginiana ‘Mohonk Red’ side by side at the northeast corner of the Gardener Athletic Center for easy inspection.  ‘Mohonk Red’ was introduced to commerce by the Arnold Arboretum and has become a nice addition to the autumnal palette of blooming shrubs.

There is still a lot to see in the garden as the last of the blooming shrubs, perennials and bulbs close out the 2011 growing season.

Autumn Leaves

The life of a leaf is never easy.  Our autumnal glory had its origin in the latent buds formed on the branches two summers ago.  They sat waiting out the cold winter exposed to the ice, snow and frigid temperatures.  As spring 2011 warmed the air and the sun’s rays shown on the naked branches our leaves began to wake.  Slowly they swelled and woke up the physiological processes of the tree.  Unfurling at a rate not too slow for us to enjoy, their life-giving duty to the tree began.  I believe photosynthesis is the most important chemical process on Earth.  Our leaves now are tasked with carrying out the exchange of CO2 and O2, providing complex sugars to the tree and driving the water uptake from the roots.  This is no small assignment for such a delicate piece of Mother Nature’s beauty.  Last summer’s prolonged dry spell and record setting consecutive days of at or near triple digit temperatures was more than some could handle.  Those that the tree did not shed finally arrived to the welcoming rains of a very wet August.  Before the tree can relinquish the army of leaves in the fall, they are asked for one more act.  They must replenish the tree with all their stored up food supplies to get the tree through winter.  While green chlorophyll exits the leaves it exposes the pigments that provide the stunning display of foliage.  The anthocyanin and carotenoid pigments are presented to our amazement.

There is nothing better than watching the silver maple’s yellow leaves float playfully to the ground.  It is a shame to disturb this elegant descent with the roar of the 100 dB (decibel) leaf vac truck.  You’ll see and HEAR the Grounds and Arboretum crews clearing the leaves of the turf then sucking and shredding them as are taken to the composting site on campus.

The life of our leaf is long and arduous and has kept the majestic trees on campus healthy for another season.