Franklinia alatamaha – Bartram’s Garden

Franklinia-Flower

Can you visualize a time in our brief history where a squirrel could romp from tree to tree without ever touching the ground? Where native trees spanned mile after mile?

Our distant past provided us with shelter, shade, food and warmth, as it does today. It is hardly a surprise that web and newscast stories of climate change, mass clear-cutting of trees and devastating tree disease continue to make front-page news. We mourn tree loss daily.

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Trees aide in carbon sequestration and provide ecosystems for other creatures. Selfishly, we will miss the health and psychological benefit they provide to us and our families. Trees have been falling as a result of fewer diverse species occupying a habitat which increases the risk of disease.

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Here is a case in point.

While I was at the Bartram Gardens in Philadelphia, our group “met” the Franklinia tree. Not many were familiar with it, being a species that has not been seen in the wild since 1803. It was originally found in one locale near Fort Barrington along the Altamaha River in Georgia in a “climate refuge habitat”.

The exact reason for the species disappearance is not known. Burning and clearing of land for early settlement, as well as subsequent flooding may have been contributing factors. They just don’t grow wild in Georgia any longer.

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To meet the growing fascination and horticultural demands in Europe during the late 1700s probably contributed to their disappearance. To grow one now means you are growing a part of our history.

All Franklinia grown are descendants of the original trees found in 1765 and propagated by John and William Bartram. The oldest documented specimen of Franklinia is 104 years old and lives at the Arnold Arboretum in Boston. Franklinia actually appears to be better adapted to northern climates now than to the location where it was found by the Bartrams in Georgia.

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So Why No Franklinia Elsewhere?

One theory proposes the tree declined due to climate change, possibly after migrating southward along southern river valleys during a previous ice age. It suffered from a hotter climate as the ice sheet receded. Some trees found refuge in an isolated protected habitat or “climate refuge”.

A second theory is that man destroyed the trees and habitat. It is possible that the grove the Bartrams discovered was no longer genetically diverse enough to withstand pathogens or changing conditions. Lastly, it could have happened from forests becoming monocultures. None of these theories really accounts for why in the Bartrams’ extensive travels that they never saw another Franklinia tree anywhere else.

Franklinia-Sinage

But what do they believe now?

We were told the trees habitat and distribution are shifting as more northern areas become increasingly warmer and more conducive to this tree’s horticultural, soil and weather preferences. CLIMATE CHANGE. Another consideration is how temperature change affects the forest floor and the soil organisms that aid in tree health.

The story of this “climate refugee tree” raises important questions about what will happen to other well-established tree species as human-induced climate change (also naturally occurring climate change) continues on a spiraling path.

Should we assist trees in tree migration to ensure their genetic material is safe for the future? Some would say no, arguing that getting a tree to survive when we’re not in an ice age now would be ludicrous.

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Trees migrate on their own, but conservationists argue with this approach. They prefer to plant “native” tree species almost to the detriment of the tree and its ability to thrive. When native habitat disappears it seems nature decides if trees can become “native” elsewhere providing their conditions are met. It kinda makes the native argument pointless. Its nature’s ultimate decision, not ours.

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About Garden Walk Garden Talk

I love to photograph, paint, draw, design, garden, travel the world, and pass on a few tips and ideas that I learned through experience as a Master Gardener and architect. I am highly trained in my field and enjoy my work each and every day. I garden in Niagara Falls, NY in zone 6-B. Find me at: http://gardenwalkgardentalk.com
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16 Responses to Franklinia alatamaha – Bartram’s Garden

  1. arlene says:

    First time I’ve seen such kind of tree. Look at how it spreads its branches close to the ground.

  2. Jennifer says:

    We tend to focus on animals that are endangered. People seem much more dismissive of endangered trees and plants. Thanks for highlighting and drawing attention to this unique tree Donna.

  3. The sequoias popularized in California are destined to disappear from that state as the climate shifts. Washington state is moving towards an environment that will have an ecosystem much more like California’s. The city of Phoenix has developed disaster plans for it’s citizens to deal with extended periods where the daytime temperature will be over 120 degrees. Alaska is now moving whole villages to deal with higher water levels…Global warming and climate change are hear now.

  4. That’s interesting. We talk about native plants that have adapted to North America’s climate, but our climate isn’t what it was hundreds of years ago. And that tree seems to have been struggling even a couple hundred years ago because the climate was no longer what it had been centuries before that.

  5. Denise says:

    Have they tried to re-introduce this tree to the wild?

  6. Such an interesting tree, but perhaps something of a curiosity. I am more concerned about the disappearance of once common trees such as the American Chestnut and Elm. On the other hand, it doesn’t seem wrong to “help” a plant species with its migration, especially if it is a slow-growing species. This would allow for experimentation in determining which species would be successful moving to more northern climates. But as you say, the ultimate decision belongs to the natural environment.

    • As are we all, like the ash trees right now. This tree is a very pretty native though. Why look at it as a curiosity? It is quite beautiful. As for helping species, I think we do that quite a bit, maybe too much. Our help is not always helpful.

  7. A fascinating posting, Donna. I think your last sentence ‘says it all.’ P. x

    • I do believe it is nature and not us that “finds” the right places and uses for plants and wildlife in the greater scheme of things. So many times we interfere and later find out why we should not have.

  8. bittster says:

    Good points. I wonder what else was lost during the colonization by Europeans…
    I like the idea of planting natives, but can’t stand all those red maples being planted nearly everywhere, and all nearly the same clone. How can this kind of boredom be good for diversity?

  9. A.M.B. says:

    “To grow one now means you are growing a part of our history.”

    That’s a lovely concept. This post is fascinating!

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