1 adjectives to describe fioriture

The other, who played the piffero, was a man of middle age, stout, vigorous, with a forest of tangled black hair, and dark quick eyes that were fixed steadily on the Virgin, while he blew and vexed the little brown pipe with rapid runs and nervous fioriture, until great drops of sweat dripped from its round open mouth.

1 adjectives to describe  fioriture