B. alba may refer to:
Baptisia alba, the white wild indigo or white false indigo, a herbaceous plant species native from central and eastern North America Basella alba, the Malabar spinach, a perennial vine species found in the tropics Bidens alba, an Asteraceae plant species. Bryonia alba, the white bryony, a vigorous Eurasian vine species introduced into Western North America
See also Alba (disambiguation)