Sources:
http://mywalkaboutplants.com/salix-babylonica/
http://dendro.cnre.vt.edu/dendrology/syllabus/factsheet.cfm?ID=131
https://www.mortonarb.org/trees-plants/tree-plant-descriptions/white-willow
https://academic.oup.com/qjmed/article/94/8/445/1506881
https://www.biodiversitylibrary.org/page/30156050#page/57/mode/1up
http://www.pbs.org/circleofstories/storytellers/tchin.html#transcript
http://www.csstoday.com/Item/5337.aspx
https://www.fengshuied.com/willow-trees
http://www.ecoenchantments.co.uk/myogham_willowpage.html
https://ceylontoday.lk/news/willow-wife-a-japanese-legend