Beta-D-xylosidase showing an optimal efficiency with the natural substrate xylobiose. Hydrolysis of (1->4)-beta-D-xylans, to remove successive D-xylose residues from the non-reducing termini. Optimum pH is 4.7. Optimum temperature is 60 degrees Celsius. Expressed in flowers, siliques and the apical part of the stems. Might be processed at the C-terminus. Belongs to the glycosyl hydrolase 3 family.