Vigna caracalla.
Caroline Harbouri mentions this plant in her article POT-GROWN CLIMBERS FROM SEED, THE MEDITERRANEAN GARDEN number 65 July, 2011
The first time I saw this climber was in October 2003, just before we invested in a digital camera. However, I was very excited to see this unknown plant hanging from a balcony in Pyrgi, Chios, hence the very poor photo
Some years later, 2012 to be exact, I was pushing my granddaughter's pram in Sparta and was even more thrilled to see this vine entwined around some garden railings, and the flowers at eye level
Pyrgi is the village on Chios famous for the houses decorated with black and white motifs. We had holidayed on Chios in 1998 and visited the village but mostly relied on Postcards of the houses rather than photos, again pre digital times