Hopefully a link from the Missouri Botanical Gardens will suffice. I'm a construction inspector who has done inspections on several million dollars worth of landscaping elements during subdivision development. A plane tree is literally a tree of genus Platanus. There are many different hybrids in the US.

Bonus link to Britannica reference.

Plane trees are a species of what in the US is called a sycamore. One reference states that it is a cross between the American sycamore , platanus occidentalis, and the Oriental sycamore, platanus orientalis. They grow quickly , take abuse, provide good shade, and are quite common in some places in England and Europe, southern France. In the eastern US, the common American sycamore is often found in damp lowland areas, where it often is found leaning over a river, gradually becoming more and more horizontal until finally toppling.

In England, sycamore is a common name for the related acer genus, which in the US and Canada is called maple. As picea is also often called pine, there, instead of spruce, novice stringed instrument makers in the US often have to double check their references, when they learn Stradivari made violins of pine and sycamore.