Ballota

Baptisia

Begonia

Belamcanda

Berberidopsis

Berberis

Berchemia

Bergenia

Betonica

Betula

Bignonia

Bischofia

Blechnum

Blepharocalyx

Blephilia

Bletilla

Boehmeria

Bolboschoenus

Borago

Bouteloua

Brachyelytrum

Brachyglottis

Briza

Broussonetia

Brunnera

Buddleja

Buglossoides

Bunium

Buphthalmum

Buxus