Ballota

Banksia

Baptisia

Begonia

Belamcanda

Berberidopsis

Berberis

Berchemia

Bergenia

Bessera

Betonica

Betula

Bidens

Billardiera

Bischofia

Blechnum

Blepharocalyx

Blephilia

Bletilla

Boehmeria

Bolboschoenus

Brachyelytrum

Brachyglottis

Brachypodium

Brassaiopsis

Briza

Broussonetia

Brunnera

Buddleja

Buglossoides

Buphthalmum

Buxus