We have been out in Spain and read about this regional style of flamenco from rural Malaga in the local paper. With a more elaborate rhythm section of hand claps, castanets, finger cymbals and tambourine, it gives a subtle Arabic feel to the music. I have heard this started as a very old style of folk song, that has over the years been adopted into the flamenco tradition. Verdailes is the name for the olive grown in this area of Andalucia – more info.
Another interesting podcast (thanks Kathryn O’Neil) from the World Service about flamenco music being revived as a form of protest during the economic crisis in Spain.