Bigelow Sagebrush 
Bigelow's sneezeweed 
Billy buttons 
Billygoat-weed 
Birdcage Thistle 
Bitter Fleabane 
Black-eyed Susan 
Black-eyed Susan 
Blackjack 
Blacks goodenia 
Blochman's Ragwort 
Blue Dampiera 
Blue Globe Thistle 
Blue Grassy Bells 
Blue leschenaultia 
Blue Mistflower 
Blue Pincushion 
Blue thistle 
Blue-and-white Daisybush 
Blue-eyed African daisy 
Bluestem Goldenrod 
Bog Goldenrod 
Bold-leaf Launaea 
Bonebract