Interestingly, Salix kusanoi has female and male plants. When the plants were removed, they were brought to two separate places. After two or three years, it was discovered that all the males had been brought to one place and all the females to the other. So as that they would set seed, people specially hand pollinated them.
有趣的是，由於水社柳有公、母之分，當時搶救後移往兩個不同區塊種植，兩三年後赫然發現，公、母竟各據一方，分庭抗禮，為了讓它們順利結果，還特地舉辦人工授粉的「交流婚禮」呢。