Wood vetch (Vicia sylvatica)

 

Collins, 130; Readers Digest, 127

This is a climbing hairless perennial with flowers in one-sided spikes of white or pale lilac.  It flowers from June to August but in our verges is most common in August.  The plant is common throughout the British Isles and ideally prefers rocky woods and thickets, often near to the sea.  Although on occasion it may be a small plant, it can climb to 2.5 metres in woods