|Wilma - a work in progress|
Wisteria sinensis winds counter clockwise and Wisteria floribunda winds clockwise. This is great for us, as it helps to tell them apart, but it's a very odd phenomenon. Some people originally thought that this was a result of the fact that plants that are from the northern hemisphere always twist anti-clockwise, and those from the southern hemisphere twist clockwise. Of course, Japan is in the northern hemisphere, so this doesn't correlate. The theory was then further expanded upon to include the tectonic plate movements of Japan, as it was originally in the Southern hemisphere millions of years ago.