History of the Chestnut Tree in America

The American chestnut is a large deciduous tree of the beech family native to eastern North America. The American chestnut was one of the most important forest trees throughout its range and was considered the finest chestnut tree in the world.

However, the species was devastated by chestnut blight, a fungal disease that came from chestnut trees introduced from East Asia. It is estimated that between 3 and 4 billion American chestnut trees were destroyed in the first half of the 20th century by blight after its initial discovery in 1904. Very few mature specimens of the tree exist within its historical range, although many small shoots of the former live trees remain. There are hundreds of large American chestnuts outside its historical range, some in areas where less virulent strains of the pathogen are more common, such as the 600 to 800 large trees in Northern Michigan. The species is listed as endangered in the United States and Canada.

Chinese chestnut trees have been found to have the highest resistance/immunity to chestnut blight, therefore there are currently programs to revive the American chestnut tree population by cross-breeding the blight-resistant Chinese chestnut with the American chestnut tree, so that the blight-resistant genes from Chinese chestnut may protect and restore the American chestnut population back to its original status as a dominant species in American forests.

The American Chestnut is one of the main trees used in the lumber trade both in the US and around the world. It is naturally rot-resistant, straight-grained, and formerly plentiful, American chestnut is used for a wide variety of purposes, including home construction, cabinetry, furniture, utility poles, railroad ties, and musical instruments. Not to mention the fruit the tree produces which can be cooked and eaten. Many argue over whether or not eating chestnuts is actually worth one’s time, but from personal experience I’d say it’s more than worth the time to cook!

-Jake King

The American Chestnut Returns to Charlotte’s Quest

Charlotte’s Quest recently became home to 25 American chestnut seedlings (Castanea dentata) as part of an effort to restore the nearly extinct tree to its native range.

The American chestnut was once a defining feature of the eastern North America forest. The tree, which could reach 100 feet high, made up roughly 25% of the hardwood forest from Maine to Florida. The chestnuts the trees produced were an important source of food for wildlife, livestock, and people. Its wood was rot-resistant, making it an important building material. However, in 1904 a fungus (Cryphonectria parasitica) was discovered on a chestnut tree in the New York Botanical Garden. The fungus was native to Asia, and it had little effect on the Asian chestnuts, but it decimated the American chestnut population. Within just 40 years, it virtually eradicated all mature American chestnut trees, altering U.S. forests forever.

Restoring the American Chestnut

Still, the American chestnut has not gone extinct. The blight caused by the fungus does not kill the tree’s root system, so trees will continue to send up new sprouts from their stumps, although the sprouts will eventually succumb to the blight.

Moreover, the American Chestnut Foundation (ACF) and other groups are working to restore the tree to its native range by breeding blight-resistant trees. ACF does this by crossing the American chestnut with the blight-resistant Chinese chestnut. Through many generations of careful breeding, the ACF strives to remove the Chinese chestnut genes except those that provide blight resistance. ACF is currently testing these promising new chestnuts.

Work at Charlotte’s Quest

In support of this work, Girl Scout Troop 1437 and Troop 939 and other volunteers recently helped plant 25 chestnut seedlings from ACF in the park. The Stewardship Committee and Weed Warriors helped plan and prepare the locations for the seedlings, which included the laborious task of removing large invasive vines, bushes, and some dead Chestnut trees from a previous planting from 2009.

The troops will monitor the trees throughout the year and take yearly measurements for the next five years to record growth and survivorship. The seedlings are currently wrapped in tree shelters and netting to protect them from the deer and cicadas, but there is no way to protect them from their biggest threat, the chestnut blight.

This effort will offer important real-world data to help determine whether the trees are truly blight-resistant and capable of surviving in their native range. ACF uses the data to improve its breeding project and develop a stronger and more consistent blight-resistant population.

Visit the Orchard

View the Chestnut orchard on the edge of the open field area nearing the stream, alongside the Green Trail. The new seedlings are planted amongst the trees from the 2009 planting, so the grove has some older trees that you can view the “cankers” on.