Mercurialis perennis
"Mercurialis perennis" extends from sea level to the mountain range. The ultimate height attained in different mountainous regions, e.g. in Scotland, England, Germany, and Switzerland, naturally varies with the latitude and other geographical factors. Existing colonies in some parts of Britain (including some in woods on boulder clay in East Anglia), are expanding and showing increased vigor, perhaps as a result of deeper shade in woodlands where coppicing has ceased.