Interestingly, this is considered an invasive species in the United States and some states even prohibit planting or selling trees. A species is considered invasive when it is non-native to the local ecosystem and disrupts the ecology.

In 1856, the amur cork was introduced to the United States from China. It grew in popularity quickly, shading streets and landscapes. However, the tree got comfortable in its new habitat and quickly seeded into forests. Because of its ability to grow quickly and out compete local vegetation, the spread of the amur cork posed a problem.

Why is it a fantastic tree?

Even though it’s considered invasive, this tree is fantastic. The branch spread and bough length was what really attracted us to the tree. From a distance, the branching, especially the ones that touch the ground and still stretch upward make this tree look like a cluster of separate trees. Similar to a banyan, this tree has amazing shade ability.

It’s easy to see why this tree was introduced to the United States in the first place. I am not sure when this particular tree was planted, but the Missouri Botanical Gardens was established in 1859, around the same time the tree was introduced.

Quick facts about Amur Cork Trees:

1. Deciduous
2. Native to eastern Asia, particularly China, Japan and Korea
3. It has been used in various medicines and treated ailments such as meningitis, bacillary dysentery, pneumonia and tuberculosis
4. it is a dioecious species, meaning there are female and male plants. The female plants produce seed.
5. Height and shade spread range between 30-50 feet.

Want more facts about Amur Cork Trees? Here are some great resources:

UMN’s Info Page

Wisconsin’s Department of Natural Resources info page