Borago officinalis
Borage is also known as star flower because of it’s 5 petaled blue flower (also white) and it an extremely vigorous plant once it takes off. The insects and bees are drawn to it like no other flower in the garden steadily increasing biodiversity.
Both the leafs and flower are of medicinal benefit when dealing with congested lungs when prepared as a tea. The leafs contain a very small percentage of alkaloids, but harmless once consumed in reasonable amounts. The flowers are also great in salads. They taste like cucumber.
Reference:
https://en.wikipedia.org/wiki/Borage
https://pfaf.org/user/Plant.aspx?LatinName=Borago+officinalis