|Northern marsh orchid
Roadside verges in the lowlands tend to be dominated by vigorously growing grasses and cow parsley. these things respond to the fertilisers that drift out of the fields and can outcompete less vigorous species. High fertility results in low diversity as a rule.
I felt a bout of "cabin fever" coming on at lunchtime so set off up the hill in the rain, head down and walking slowly in plant hunting mode. Probably most exotic are the northern marsh orchids only inches from your wheels when you drive up the hill. Then there are all of those species that were common in the lowlands fifty years ago; vetch, wild pea, harebell,thyme, bell heather, bugle, the list goes on.