Heather (Calluna vulgaris) grows widely across Scotland. Its purple flowers are mentioned in many Scottish poems and songs. The tips of the bush are eaten by grazing animals and bunches of flowering heather are often gathered for decorations. In the past, heather was also used to bitter Scottish beers.
Hops don’t grow natively in Scotland. In the 1800s and 1900s, Scottish brewers imported their hops. Before that, in the 1700s and earlier, there is some evidence that Scottish brewers used other bittering agents in their beer. (There is a lot of conflicting evidence about this. I’m not a historian, but it seems there is at least some evidence to support this.)
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