Whorled Solomon’s Seal – Polygonatum verticillatum
Probably one of the rarest and most threatened plants in Scotland, though much commoner across Europe. It survives only in a few inaccessible wooded ravines on tributaries of the River Tay in Perthshire. Instead of pairs of broad leaves overhanging the flowers, this species has its flowers and narrower leaves arranged in whorls; early summer flowers in June.