I didn't really know that I've lot of B's here - so there are more than just one or two pictures to show:
Baby Bear - miniature
Beautiful Edgings - seems to grow in every garden
Before - really quite early here, still potted
Belle Isle Eye - distinctive miniature, needs no name tag
Bengal Fire - a good late one, reblooms
Bertie Ferris - still a very good miniature cultivar
Best For Last - perfect name for a perfect plant
Best Offer - small, prolific bloomer, reblooms sometimes
Betka - really tiny, reblooms
Betty Benz - beautiful, but up to now very slow growing
Big Navy - very prolific, lots of big flowers, good color
Black Arrowhead - reliable rebloomer
Black Cherry Type VT - a late flowering and prolific plant, not registered (from Olallie)
Black Hops - very impressive color
Black Ice - color between black and red, depending on temperature
Black Pearl - miniature, needs warm nights to show its deep dark color
Black Velvet Baby - beautiful but not black, many buds
Blown Away - dormant, norther hardy, very ruffled
Blue Pink Beauty - true pink, very fragrant, many many buds
Bluebird Butterfly - if you are looking for a easy to care blue eyed one, this is a good choice
Blues Avenue - very early, patterned eye
and there are about 15 more - shall I post them all?