Trachycarpus Family of Palms
The most common of the cold and wet hardy palms is the Chinese Windmill Palm. It is part of the Trachycarpus family of palms. There is a lot of variation with the species and most are cross fertile. Trachycarpus Palms are male and female and both are required to pollinate and produce seed.
Trachycarpus Fortunei (Chinese windmill)