Bromus racemosus (bald brome)

Boltonia diffusa (smallhead doll's daisy)
Borago officinalis
Bosnia and Herzegovina
Botrychium dissectum (cutleaf grapefern)
Botrychium lanceolatum (lanceleaf grapefern)
Botrychium lunaria (common moonwort)
Botrychium matricariifolium (matricary grapefern)
Botrychium multifidum (leathery grapefern)
Botrychium simplex (little grapefern)
Botswana
Bouteloua curtipendula var. curtipendula (sideoats grama)
Bouteloua dactyloides (buffalograss)
Bouteloua gracilis (blue grama)
Bouteloua hirsuta (hairy grama)
Bouvet Island
Brachyelytrum erectum (bearded shorthusk)
Brachypodium pinnatum
Brassica napus
Brassica nigra
Brassica nigra (black mustard)
Brassica oleracea var. botrytis
Brassica rapa var. rapa (field mustard)
Brazil
British Indian Ocean Territory
British Virgin Islands
Briza media (perennial quakinggrass)
Briza minor (little quakinggrass)
Bromopsis erecta
Bromus arvensis (field brome)

Image of Bromus racemosus (bald brome) 1
USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. Vol. 1: 278.