Well what do you know - I was unaware that there was a rose named for St. Nicholas Day although I must say I would have expected it to be a red rose.
St. Nicholas is very widely celebrated here. Many parents organise for St. Nikolaus or Samichlaus, as he is referred to here, and his helper Knecht Ruprecht to come and visit their homes. The children all learn versus to recite and the Samichlaus distributes praise and blame and, supposedly depending on the obedience of the children, gifts in the form of nuts, mandarins, chocolates and first Christmas cookies. Here is a picture from the early 90's of our DD listening to the Samichlaus reading up on her deeds over the last year - from the look on her face, they weren't all good.
Today, we even got a little bag of nuts and chocolates at the office this morning but there was no Samichlaus
There is also a village in Switzerland called St. Niklaus where they put up the biggest 'Samichlaus' ever in 2014. They decorated the church steeple.
I actually have fond memories of the village because we spent a week there during our honeymoon way back when....
Got a little OT - hope you don't mind