How are the veins arranged in a ginkgo leaf?

The leaves of the Ginkgo tree feature a fan-shaped blade with a distinct dichotomous venation pattern.1

In this arrangement, two vascular bundles extend through the leaf stalk (petiole) and branch out into two systems of dichotomously divided veins. This system is generally characterized as an "open" type, meaning it is typically devoid of vein fusions, although research has shown that vein unions can occur with some regularity. This specific venation pattern is a striking morphological characteristic of the ginkgo and was also present in the leaves of extinct members of the Ginkgoales.1