The Kentucky coffeetree is believed to be an example of evolutionary anachronism .   The tough, leathery seed pods are too difficult for many animals to chew through (in addition to being poisonous) and they are too heavy for either wind or water dispersal. It is thus believed that the tree would have been browsed upon by now-extinct mammoths and mastodons which ate the pods and nicked the seeds with their large teeth, aiding in germination. This behavior is seen among African elephants eating Fabaceae relatives in Africa. Because of this, its prehistoric range may have been much larger than it has been in historical times. Today, in the wild, it only grows well in wetlands, and it is thought that only in such wet conditions can the seed pods rot away to allow germination in the absence of large herbivores. 
The executive branch is headed by the governor who serves as both head of state and head of government . The lieutenant governor may or may not have executive authority depending on whether the person is a member of the Governor's cabinet . Under the current Kentucky Constitution , the lieutenant governor assumes the duties of the governor only if the governor is incapacitated. (Before 1992 the lieutenant governor assumed power any time the governor was out of the state.) The governor and lieutenant governor usually run on a single ticket (also per a 1992 constitutional amendment), and are elected to four-year terms. The current governor is Republican Matt Bevin , and the lieutenant governor is Jenean Hampton .