Baccharis

Backhousia

Ballota

Baptisia

Begonia

Belamcanda

Berberidopsis

Berberis

Berchemia

Bergenia

Betonica

Betula

Bidens

Bignonia

Bischofia

Blechnum

Blepharocalyx

Blephilia

Boehmeria

Bolboschoenus

Bouteloua

Brachychiton

Brachyelytrum

Brachyglottis

Briza

Broussonetia

Brunfelsia

Brunnera

Buddleja

Buglossoides

Bunium

Buphthalmum

Bupleurum

Buxus