Here is one example of the maiko kanzashi calendar. These photos are all of maiko, or photos of maiko kanzashi (that I've been able to find. Some are comercially available from rakuten etc). None of these photos are mine. I put together this list to show examples of each flower for each month.
The survey is here: https://goo.gl/forms/dxFPcbdPdr6mePSA3
February Plum blossom (ume 梅) kanzashi for senior maiko. Elegant in ivory habutae, this traditional hair pin is sold in Ikuokaya, a traditional hair ornament shop in Kyoto which maiko (and others!) may purchase this work of art.