A genus with 5 species distributed in tropical South Africa, Madagas¬car, upper Egypt, Iraq, W. Pakistan and N. W. India. Only 1 species has been reported from W. Pakistan.

Lower Taxon

• Bistella digyna (Retz.) Bullock

Related Synonym(s):

• Oldenlandia digyna Retz. = Bistella digyna (Retz.) Bullock
• Vahlia digyna (Retz.) O. Kuntze = Bistella digyna (Retz.) Bullock
• Vahlia sessiliflora DC. = Bistella digyna (Retz.) Bullock
• Vahlia viscosa Roxb. = Bistella digyna (Retz.) Bullock