The Catch-All Botany Thread

[thesummerqueen]

In the spirit of old plants... (It's also one of the trees we learned about)

Currently, Ginkgo biloba is the only known existing species of Ginkgoaceae. The term living fossil is often used to describe Ginkgo biloba since it appears the same today as it did in the past, as seen in the fossil record. This species dates back to about 190 million years ago, but the order to which it belongs, Ginkgoales, can be traced back earlier, to the Permian period. In the mountains of China, the species survived in Buddhist monasteries and were introduced throughout Asia around 1100 AD. It did not reach Europe or America until the 1700s. During the Cretaceous, at least five or six other Ginkgo species existed. Our knowledge of these now-extinct species is based mainly on leaf remains, since the stems and fruits rarely survive the fossilization process (Tidwell's Common Fossil Plants of Western North America (1975)). Leaf shape also helps to distinguish different species from one another. For example, the leaf of Ginkgo dissecta has a deeply dissected blade, as the species name implies, creating several lobes.

Base of one tree:



My teacher had a magazine photo of a man in the branches of one - the tree gets so big that a full grown man looks like a child climbing up it.